# -*- coding: utf-8 -*-
##############################################################################
#
# OpenERP, Open Source Management Solution
# Copyright (C) 2013-2014 OpenERP (<http://www.openerp.com>).
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################
""" High-level objects for fields. """
from collections import OrderedDict
from datetime import date, datetime
from functools import partial
from operator import attrgetter
from types import NoneType
import logging
import pytz
import xmlrpclib
from openerp.sql_db import LazyCursor
from openerp.tools import float_round, frozendict, html_sanitize, ustr, OrderedSet
from openerp.tools import DEFAULT_SERVER_DATE_FORMAT as DATE_FORMAT
from openerp.tools import DEFAULT_SERVER_DATETIME_FORMAT as DATETIME_FORMAT
DATE_LENGTH = len(date.today().strftime(DATE_FORMAT))
DATETIME_LENGTH = len(datetime.now().strftime(DATETIME_FORMAT))
EMPTY_DICT = frozendict()
_logger = logging.getLogger(__name__)
class SpecialValue(object):
""" Encapsulates a value in the cache in place of a normal value. """
def __init__(self, value):
self.value = value
def get(self):
return self.value
class FailedValue(SpecialValue):
""" Special value that encapsulates an exception instead of a value. """
def __init__(self, exception):
self.exception = exception
def get(self):
raise self.exception
def _check_value(value):
""" Return ``value``, or call its getter if ``value`` is a :class:`SpecialValue`. """
return value.get() if isinstance(value, SpecialValue) else value
def copy_cache(records, env):
""" Recursively copy the cache of ``records`` to the environment ``env``. """
todo, done = set(records), set()
while todo:
record = todo.pop()
if record not in done:
done.add(record)
target = record.with_env(env)
for name, value in record._cache.iteritems():
if isinstance(value, BaseModel):
todo.update(value)
value = value.with_env(env)
target._cache[name] = value
def resolve_all_mro(cls, name, reverse=False):
""" Return the (successively overridden) values of attribute ``name`` in ``cls``
in mro order, or inverse mro order if ``reverse`` is true.
"""
klasses = reversed(cls.__mro__) if reverse else cls.__mro__
for klass in klasses:
if name in klass.__dict__:
yield klass.__dict__[name]
class MetaField(type):
""" Metaclass for field classes. """
by_type = {}
def __new__(meta, name, bases, attrs):
""" Combine the ``_slots`` dict from parent classes, and determine
``__slots__`` for them on the new class.
"""
base_slots = {}
for base in reversed(bases):
base_slots.update(getattr(base, '_slots', ()))
slots = dict(base_slots)
slots.update(attrs.get('_slots', ()))
attrs['__slots__'] = set(slots) - set(base_slots)
attrs['_slots'] = slots
return type.__new__(meta, name, bases, attrs)
def __init__(cls, name, bases, attrs):
super(MetaField, cls).__init__(name, bases, attrs)
if cls.type and cls.type not in MetaField.by_type:
MetaField.by_type[cls.type] = cls
# compute class attributes to avoid calling dir() on fields
cls.column_attrs = []
cls.related_attrs = []
cls.description_attrs = []
for attr in dir(cls):
if attr.startswith('_column_'):
cls.column_attrs.append((attr[8:], attr))
elif attr.startswith('_related_'):
cls.related_attrs.append((attr[9:], attr))
elif attr.startswith('_description_'):
cls.description_attrs.append((attr[13:], attr))
class Field(object):
""" The field descriptor contains the field definition, and manages accesses
and assignments of the corresponding field on records. The following
attributes may be provided when instanciating a field:
:param string: the label of the field seen by users (string); if not
set, the ORM takes the field name in the class (capitalized).
:param help: the tooltip of the field seen by users (string)
:param readonly: whether the field is readonly (boolean, by default ``False``)
:param required: whether the value of the field is required (boolean, by
default ``False``)
:param index: whether the field is indexed in database (boolean, by
default ``False``)
:param default: the default value for the field; this is either a static
value, or a function taking a recordset and returning a value
:param states: a dictionary mapping state values to lists of UI attribute-value
pairs; possible attributes are: 'readonly', 'required', 'invisible'.
Note: Any state-based condition requires the ``state`` field value to be
available on the client-side UI. This is typically done by including it in
the relevant views, possibly made invisible if not relevant for the
end-user.
:param groups: comma-separated list of group xml ids (string); this
restricts the field access to the users of the given groups only
:param bool copy: whether the field value should be copied when the record
is duplicated (default: ``True`` for normal fields, ``False`` for
``one2many`` and computed fields, including property fields and
related fields)
:param string oldname: the previous name of this field, so that ORM can rename
it automatically at migration
.. _field-computed:
.. rubric:: Computed fields
One can define a field whose value is computed instead of simply being
read from the database. The attributes that are specific to computed
fields are given below. To define such a field, simply provide a value
for the attribute ``compute``.
:param compute: name of a method that computes the field
:param inverse: name of a method that inverses the field (optional)
:param search: name of a method that implement search on the field (optional)
:param store: whether the field is stored in database (boolean, by
default ``False`` on computed fields)
:param compute_sudo: whether the field should be recomputed as superuser
to bypass access rights (boolean, by default ``False``)
The methods given for ``compute``, ``inverse`` and ``search`` are model
methods. Their signature is shown in the following example::
upper = fields.Char(compute='_compute_upper',
inverse='_inverse_upper',
search='_search_upper')
@api.depends('name')
def _compute_upper(self):
for rec in self:
rec.upper = rec.name.upper() if rec.name else False
def _inverse_upper(self):
for rec in self:
rec.name = rec.upper.lower() if rec.upper else False
def _search_upper(self, operator, value):
if operator == 'like':
operator = 'ilike'
return [('name', operator, value)]
The compute method has to assign the field on all records of the invoked
recordset. The decorator :meth:`openerp.api.depends` must be applied on
the compute method to specify the field dependencies; those dependencies
are used to determine when to recompute the field; recomputation is
automatic and guarantees cache/database consistency. Note that the same
method can be used for several fields, you simply have to assign all the
given fields in the method; the method will be invoked once for all
those fields.
By default, a computed field is not stored to the database, and is
computed on-the-fly. Adding the attribute ``store=True`` will store the
field's values in the database. The advantage of a stored field is that
searching on that field is done by the database itself. The disadvantage
is that it requires database updates when the field must be recomputed.
The inverse method, as its name says, does the inverse of the compute
method: the invoked records have a value for the field, and you must
apply the necessary changes on the field dependencies such that the
computation gives the expected value. Note that a computed field without
an inverse method is readonly by default.
The search method is invoked when processing domains before doing an
actual search on the model. It must return a domain equivalent to the
condition: ``field operator value``.
.. _field-related:
.. rubric:: Related fields
The value of a related field is given by following a sequence of
relational fields and reading a field on the reached model. The complete
sequence of fields to traverse is specified by the attribute
:param related: sequence of field names
Some field attributes are automatically copied from the source field if
they are not redefined: ``string``, ``help``, ``readonly``, ``required`` (only
if all fields in the sequence are required), ``groups``, ``digits``, ``size``,
``translate``, ``sanitize``, ``selection``, ``comodel_name``, ``domain``,
``context``. All semantic-free attributes are copied from the source
field.
By default, the values of related fields are not stored to the database.
Add the attribute ``store=True`` to make it stored, just like computed
fields. Related fields are automatically recomputed when their
dependencies are modified.
.. _field-company-dependent:
.. rubric:: Company-dependent fields
Formerly known as 'property' fields, the value of those fields depends
on the company. In other words, users that belong to different companies
may see different values for the field on a given record.
:param company_dependent: whether the field is company-dependent (boolean)
.. _field-incremental-definition:
.. rubric:: Incremental definition
A field is defined as class attribute on a model class. If the model
is extended (see :class:`~openerp.models.Model`), one can also extend
the field definition by redefining a field with the same name and same
type on the subclass. In that case, the attributes of the field are
taken from the parent class and overridden by the ones given in
subclasses.
For instance, the second class below only adds a tooltip on the field
``state``::
class First(models.Model):
_name = 'foo'
state = fields.Selection([...], required=True)
class Second(models.Model):
_inherit = 'foo'
state = fields.Selection(help="Blah blah blah")
"""
__metaclass__ = MetaField
type = None # type of the field (string)
relational = False # whether the field is a relational one
_slots = {
'_attrs': EMPTY_DICT, # dictionary of field attributes; it contains:
# - all attributes after __init__()
# - free attributes only after set_class_name()
'automatic': False, # whether the field is automatically created ("magic" field)
'inherited': False, # whether the field is inherited (_inherits)
'column': None, # the column corresponding to the field
'setup_done': False, # whether the field has been set up
'name': None, # name of the field
'model_name': None, # name of the model of this field
'comodel_name': None, # name of the model of values (if relational)
'store': True, # whether the field is stored in database
'index': False, # whether the field is indexed in database
'manual': False, # whether the field is a custom field
'copy': True, # whether the field is copied over by BaseModel.copy()
'depends': (), # collection of field dependencies
'recursive': False, # whether self depends on itself
'compute': None, # compute(recs) computes field on recs
'compute_sudo': False, # whether field should be recomputed as admin
'inverse': None, # inverse(recs) inverses field on recs
'search': None, # search(recs, operator, value) searches on self
'related': None, # sequence of field names, for related fields
'related_sudo': True, # whether related fields should be read as admin
'company_dependent': False, # whether ``self`` is company-dependent (property field)
'default': None, # default(recs) returns the default value
'string': None, # field label
'help': None, # field tooltip
'readonly': False, # whether the field is readonly
'required': False, # whether the field is required
'states': None, # set readonly and required depending on state
'groups': None, # csv list of group xml ids
'change_default': False, # whether the field may trigger a "user-onchange"
'deprecated': None, # whether the field is deprecated
'inverse_fields': (), # collection of inverse fields (objects)
'computed_fields': (), # fields computed with the same method as self
'related_field': None, # corresponding related field
'_triggers': (), # invalidation and recomputation triggers
}
def __init__(self, string=None, **kwargs):
kwargs['string'] = string
attrs = {key: val for key, val in kwargs.iteritems() if val is not None}
self._attrs = attrs or EMPTY_DICT
def __getattr__(self, name):
""" Access non-slot field attribute. """
try:
return self._attrs[name]
except KeyError:
raise AttributeError(name)
def __setattr__(self, name, value):
""" Set slot or non-slot field attribute. """
try:
object.__setattr__(self, name, value)
except AttributeError:
if self._attrs:
self._attrs[name] = value
else:
self._attrs = {name: value} # replace EMPTY_DICT
def __delattr__(self, name):
""" Remove non-slot field attribute. """
try:
del self._attrs[name]
except KeyError:
raise AttributeError(name)
def new(self, **kwargs):
""" Return a field of the same type as ``self``, with its own parameters. """
return type(self)(**kwargs)
def set_class_name(self, cls, name):
""" Assign the model class and field name of ``self``. """
self_attrs = self._attrs
for attr, value in self._slots.iteritems():
setattr(self, attr, value)
self.model_name = cls._name
self.name = name
# determine all inherited field attributes
attrs = {}
for field in resolve_all_mro(cls, name, reverse=True):
if isinstance(field, type(self)):
attrs.update(field._attrs)
else:
attrs.clear()
attrs.update(self_attrs) # necessary in case self is not in cls
# initialize ``self`` with ``attrs``
if attrs.get('compute'):
# by default, computed fields are not stored, not copied and readonly
attrs['store'] = attrs.get('store', False)
attrs['copy'] = attrs.get('copy', False)
attrs['readonly'] = attrs.get('readonly', not attrs.get('inverse'))
if attrs.get('related'):
# by default, related fields are not stored and not copied
attrs['store'] = attrs.get('store', False)
attrs['copy'] = attrs.get('copy', False)
# fix for function fields overridden by regular columns
if not isinstance(attrs.get('column'), (NoneType, fields.function)):
attrs.pop('store', None)
for attr, value in attrs.iteritems():
setattr(self, attr, value)
if not self.string and not self.related:
# related fields get their string from their parent field
self.string = name.replace('_', ' ').capitalize()
# determine self.default and cls._defaults in a consistent way
self._determine_default(cls, name)
def _determine_default(self, cls, name):
""" Retrieve the default value for ``self`` in the hierarchy of ``cls``, and
determine ``self.default`` and ``cls._defaults`` accordingly.
"""
self.default = None
# traverse the class hierarchy upwards, and take the first field
# definition with a default or _defaults for self
for klass in cls.__mro__:
if name in klass.__dict__:
field = klass.__dict__[name]
if not isinstance(field, type(self)):
# klass contains another value overridden by self
return
if 'default' in field._attrs:
# take the default in field, and adapt it for cls._defaults
value = field._attrs['default']
if callable(value):
from openerp import api
self.default = value
cls._defaults[name] = api.model(
lambda recs: self.convert_to_write(value(recs))
)
else:
self.default = lambda recs: value
cls._defaults[name] = value
return
defaults = klass.__dict__.get('_defaults') or {}
if name in defaults:
# take the value from _defaults, and adapt it for self.default
value = defaults[name]
if callable(value):
func = lambda recs: value(recs._model, recs._cr, recs._uid, recs._context)
else:
func = lambda recs: value
self.default = lambda recs: self.convert_to_cache(
func(recs), recs, validate=False,
)
cls._defaults[name] = value
return
def __str__(self):
return "%s.%s" % (self.model_name, self.name)
def __repr__(self):
return "%s.%s" % (self.model_name, self.name)
############################################################################
#
# Field setup
#
def setup(self, env):
""" Make sure that ``self`` is set up, except for recomputation triggers. """
if not self.setup_done:
if self.related:
self._setup_related(env)
else:
self._setup_regular(env)
self.setup_done = True
#
# Setup of non-related fields
#
def _setup_regular(self, env):
""" Setup the attributes of a non-related field. """
recs = env[self.model_name]
def make_depends(deps):
return tuple(deps(recs) if callable(deps) else deps)
# convert compute into a callable and determine depends
if isinstance(self.compute, basestring):
# if the compute method has been overridden, concatenate all their _depends
self.depends = ()
for method in resolve_all_mro(type(recs), self.compute, reverse=True):
self.depends += make_depends(getattr(method, '_depends', ()))
self.compute = getattr(type(recs), self.compute)
else:
self.depends = make_depends(getattr(self.compute, '_depends', ()))
# convert inverse and search into callables
if isinstance(self.inverse, basestring):
self.inverse = getattr(type(recs), self.inverse)
if isinstance(self.search, basestring):
self.search = getattr(type(recs), self.search)
#
# Setup of related fields
#
def _setup_related(self, env):
""" Setup the attributes of a related field. """
# fix the type of self.related if necessary
if isinstance(self.related, basestring):
self.related = tuple(self.related.split('.'))
# determine the chain of fields, and make sure they are all set up
recs = env[self.model_name]
fields = []
for name in self.related:
field = recs._fields[name]
field.setup(env)
recs = recs[name]
fields.append(field)
self.related_field = field
# check type consistency
if self.type != field.type:
raise Warning("Type of related field %s is inconsistent with %s" % (self, field))
# determine dependencies, compute, inverse, and search
self.depends = ('.'.join(self.related),)
self.compute = self._compute_related
if not (self.readonly or field.readonly):
self.inverse = self._inverse_related
if field._description_searchable:
# allow searching on self only if the related field is searchable
self.search = self._search_related
# copy attributes from field to self (string, help, etc.)
for attr, prop in self.related_attrs:
if not getattr(self, attr):
setattr(self, attr, getattr(field, prop))
for attr, value in field._attrs.iteritems():
if attr not in self._attrs:
setattr(self, attr, value)
# special case for states: copy it only for inherited fields
if not self.states and self.inherited:
self.states = field.states
# special case for required: check if all fields are required
if not self.store and not self.required:
self.required = all(field.required for field in fields)
def _compute_related(self, records):
""" Compute the related field ``self`` on ``records``. """
# when related_sudo, bypass access rights checks when reading values
others = records.sudo() if self.related_sudo else records
for record, other in zip(records, others):
if not record.id and record.env != other.env:
# draft records: copy record's cache to other's cache first
copy_cache(record, other.env)
# traverse the intermediate fields; follow the first record at each step
for name in self.related[:-1]:
other = other[name][:1]
record[self.name] = other[self.related[-1]]
def _inverse_related(self, records):
""" Inverse the related field ``self`` on ``records``. """
# store record values, otherwise they may be lost by cache invalidation!
record_value = {record: record[self.name] for record in records}
for record in records:
other = record
# traverse the intermediate fields, and keep at most one record
for name in self.related[:-1]:
other = other[name][:1]
if other:
other[self.related[-1]] = record_value[record]
def _search_related(self, records, operator, value):
""" Determine the domain to search on field ``self``. """
return [('.'.join(self.related), operator, value)]
# properties used by _setup_related() to copy values from related field
_related_comodel_name = property(attrgetter('comodel_name'))
_related_string = property(attrgetter('string'))
_related_help = property(attrgetter('help'))
_related_readonly = property(attrgetter('readonly'))
_related_groups = property(attrgetter('groups'))
@property
def base_field(self):
""" Return the base field of an inherited field, or ``self``. """
return self.related_field.base_field if self.inherited else self
#
# Setup of field triggers
#
# The triggers is a collection of pairs (field, path) of computed fields
# that depend on ``self``. When ``self`` is modified, it invalidates the cache
# of each ``field``, and registers the records to recompute based on ``path``.
# See method ``modified`` below for details.
#
def add_trigger(self, trigger):
""" Add a recomputation trigger on ``self``. """
if trigger not in self._triggers:
self._triggers += (trigger,)
def setup_triggers(self, env):
""" Add the necessary triggers to invalidate/recompute ``self``. """
model = env[self.model_name]
for path in self.depends:
self._setup_dependency([], model, path.split('.'))
def _setup_dependency(self, path0, model, path1):
""" Make ``self`` depend on ``model``; `path0 + path1` is a dependency of
``self``, and ``path0`` is the sequence of field names from ``self.model``
to ``model``.
"""
env = model.env
head, tail = path1[0], path1[1:]
if head == '*':
# special case: add triggers on all fields of model (except self)
fields = set(model._fields.itervalues()) - set([self])
else:
fields = [model._fields[head]]
for field in fields:
if field == self:
_logger.debug("Field %s is recursively defined", self)
self.recursive = True
continue
#_logger.debug("Add trigger on %s to recompute %s", field, self)
field.add_trigger((self, '.'.join(path0 or ['id'])))
# add trigger on inverse fields, too
for invf in field.inverse_fields:
#_logger.debug("Add trigger on %s to recompute %s", invf, self)
invf.add_trigger((self, '.'.join(path0 + [head])))
# recursively traverse the dependency
if tail:
comodel = env[field.comodel_name]
self._setup_dependency(path0 + [head], comodel, tail)
@property
def dependents(self):
""" Return the computed fields that depend on ``self``. """
return (field for field, path in self._triggers)
############################################################################
#
# Field description
#
def get_description(self, env):
""" Return a dictionary that describes the field ``self``. """
desc = {'type': self.type}
for attr, prop in self.description_attrs:
value = getattr(self, prop)
if callable(value):
value = value(env)
if value is not None:
desc[attr] = value
return desc
# properties used by get_description()
_description_store = property(attrgetter('store'))
_description_manual = property(attrgetter('manual'))
_description_depends = property(attrgetter('depends'))
_description_related = property(attrgetter('related'))
_description_company_dependent = property(attrgetter('company_dependent'))
_description_readonly = property(attrgetter('readonly'))
_description_required = property(attrgetter('required'))
_description_states = property(attrgetter('states'))
_description_groups = property(attrgetter('groups'))
_description_change_default = property(attrgetter('change_default'))
_description_deprecated = property(attrgetter('deprecated'))
@property
def _description_searchable(self):
return bool(self.store or self.search or (self.column and self.column._fnct_search))
@property
def _description_sortable(self):
return self.store or (self.inherited and self.related_field._description_sortable)
def _description_string(self, env):
if self.string and env.lang:
field = self.base_field
name = "%s,%s" % (field.model_name, field.name)
trans = env['ir.translation']._get_source(name, 'field', env.lang)
return trans or self.string
return self.string
def _description_help(self, env):
if self.help and env.lang:
field = self.base_field
name = "%s,%s" % (field.model_name, field.name)
trans = env['ir.translation']._get_source(name, 'help', env.lang)
return trans or self.help
return self.help
############################################################################
#
# Conversion to column instance
#
def to_column(self):
""" Return a column object corresponding to ``self``, or ``None``. """
if not self.store and self.compute:
# non-stored computed fields do not have a corresponding column
self.column = None
return None
# determine column parameters
#_logger.debug("Create fields._column for Field %s", self)
args = {}
for attr, prop in self.column_attrs:
args[attr] = getattr(self, prop)
for attr, value in self._attrs.iteritems():
args[attr] = value
if self.company_dependent:
# company-dependent fields are mapped to former property fields
args['type'] = self.type
args['relation'] = self.comodel_name
self.column = fields.property(**args)
elif self.column:
# let the column provide a valid column for the given parameters
self.column = self.column.new(_computed_field=bool(self.compute), **args)
else:
# create a fresh new column of the right type
self.column = getattr(fields, self.type)(**args)
return self.column
# properties used by to_column() to create a column instance
_column_copy = property(attrgetter('copy'))
_column_select = property(attrgetter('index'))
_column_manual = property(attrgetter('manual'))
_column_string = property(attrgetter('string'))
_column_help = property(attrgetter('help'))
_column_readonly = property(attrgetter('readonly'))
_column_required = property(attrgetter('required'))
_column_states = property(attrgetter('states'))
_column_groups = property(attrgetter('groups'))
_column_change_default = property(attrgetter('change_default'))
_column_deprecated = property(attrgetter('deprecated'))
############################################################################
#
# Conversion of values
#
def null(self, env):
""" return the null value for this field in the given environment """
return False
def convert_to_cache(self, value, record, validate=True):
""" convert ``value`` to the cache level in ``env``; ``value`` may come from
an assignment, or have the format of methods :meth:`BaseModel.read`
or :meth:`BaseModel.write`
:param record: the target record for the assignment, or an empty recordset
:param bool validate: when True, field-specific validation of
``value`` will be performed
"""
return value
def convert_to_read(self, value, use_name_get=True):
""" convert ``value`` from the cache to a value as returned by method
:meth:`BaseModel.read`
:param bool use_name_get: when True, value's diplay name will
be computed using :meth:`BaseModel.name_get`, if relevant
for the field
"""
return False if value is None else value
def convert_to_write(self, value, target=None, fnames=None):
""" convert ``value`` from the cache to a valid value for method
:meth:`BaseModel.write`.
:param target: optional, the record to be modified with this value
:param fnames: for relational fields only, an optional collection of
field names to convert
"""
return self.convert_to_read(value)
def convert_to_onchange(self, value):
""" convert ``value`` from the cache to a valid value for an onchange
method v7.
"""
return self.convert_to_write(value)
def convert_to_export(self, value, env):
""" convert ``value`` from the cache to a valid value for export. The
parameter ``env`` is given for managing translations.
"""
if not value:
return ''
return value if env.context.get('export_raw_data') else ustr(value)
def convert_to_display_name(self, value, record=None):
""" convert ``value`` from the cache to a suitable display name. """
return ustr(value)
############################################################################
#
# Descriptor methods
#
def __get__(self, record, owner):
""" return the value of field ``self`` on ``record`` """
if record is None:
return self # the field is accessed through the owner class
if not record:
# null record -> return the null value for this field
return self.null(record.env)
# only a single record may be accessed
record.ensure_one()
try:
return record._cache[self]
except KeyError:
pass
# cache miss, retrieve value
if record.id:
# normal record -> read or compute value for this field
self.determine_value(record)
else:
# draft record -> compute the value or let it be null
self.determine_draft_value(record)
# the result should be in cache now
return record._cache[self]
def __set__(self, record, value):
""" set the value of field ``self`` on ``record`` """
env = record.env
# only a single record may be updated
record.ensure_one()
# adapt value to the cache level
value = self.convert_to_cache(value, record)
if env.in_draft or not record.id:
# determine dependent fields
spec = self.modified_draft(record)
# set value in cache, inverse field, and mark record as dirty
record._cache[self] = value
if env.in_onchange:
for invf in self.inverse_fields:
invf._update(value, record)
record._set_dirty(self.name)
# determine more dependent fields, and invalidate them
if self.relational:
spec += self.modified_draft(record)
env.invalidate(spec)
else:
# simply write to the database, and update cache
record.write({self.name: self.convert_to_write(value)})
record._cache[self] = value
############################################################################
#
# Computation of field values
#
def _compute_value(self, records):
""" Invoke the compute method on ``records``. """
# initialize the fields to their corresponding null value in cache
for field in self.computed_fields:
records._cache[field] = field.null(records.env)
records.env.computed[field].update(records._ids)
self.compute(records)
for field in self.computed_fields:
records.env.computed[field].difference_update(records._ids)
def compute_value(self, records):
""" Invoke the compute method on ``records``; the results are in cache. """
with records.env.do_in_draft():
try:
self._compute_value(records)
except (AccessError, MissingError):
# some record is forbidden or missing, retry record by record
for record in records:
try:
self._compute_value(record)
except Exception as exc:
record._cache[self.name] = FailedValue(exc)
def determine_value(self, record):
""" Determine the value of ``self`` for ``record``. """
env = record.env
if self.column and not (self.depends and env.in_draft):
# this is a stored field or an old-style function field
if self.depends:
# this is a stored computed field, check for recomputation
recs = record._recompute_check(self)
if recs:
# recompute the value (only in cache)
self.compute_value(recs)
# HACK: if result is in the wrong cache, copy values
if recs.env != env:
for source, target in zip(recs, recs.with_env(env)):
try:
values = target._convert_to_cache({
f.name: source[f.name] for f in self.computed_fields
}, validate=False)
except MissingError as e:
values = FailedValue(e)
target._cache.update(values)
# the result is saved to database by BaseModel.recompute()
return
# read the field from database
record._prefetch_field(self)
elif self.compute:
# this is either a non-stored computed field, or a stored computed
# field in draft mode
if self.recursive:
self.compute_value(record)
else:
recs = record._in_cache_without(self)
self.compute_value(recs)
else:
# this is a non-stored non-computed field
record._cache[self] = self.null(env)
def determine_draft_value(self, record):
""" Determine the value of ``self`` for the given draft ``record``. """
if self.compute:
self._compute_value(record)
else:
record._cache[self] = SpecialValue(self.null(record.env))
def determine_inverse(self, records):
""" Given the value of ``self`` on ``records``, inverse the computation. """
if self.inverse:
self.inverse(records)
def determine_domain(self, records, operator, value):
""" Return a domain representing a condition on ``self``. """
if self.search:
return self.search(records, operator, value)
else:
return [(self.name, operator, value)]
############################################################################
#
# Notification when fields are modified
#
def modified(self, records):
""" Notify that field ``self`` has been modified on ``records``: prepare the
fields/records to recompute, and return a spec indicating what to
invalidate.
"""
# invalidate the fields that depend on self, and prepare recomputation
spec = [(self, records._ids)]
for field, path in self._triggers:
if path and field.compute and field.store:
# don't move this line to function top, see log
env = records.env(user=SUPERUSER_ID, context={'active_test': False})
target = env[field.model_name].search([(path, 'in', records.ids)])
if target:
spec.append((field, target._ids))
# recompute field on target in the environment of records,
# and as user admin if required
if field.compute_sudo:
target = target.with_env(records.env(user=SUPERUSER_ID))
else:
target = target.with_env(records.env)
target._recompute_todo(field)
else:
spec.append((field, None))
return spec
def modified_draft(self, records):
""" Same as :meth:`modified`, but in draft mode. """
env = records.env
# invalidate the fields on the records in cache that depend on
# ``records``, except fields currently being computed
spec = []
for field, path in self._triggers:
if not field.compute:
# Note: do not invalidate non-computed fields. Such fields may
# require invalidation in general (like *2many fields with
# domains) but should not be invalidated in this case, because
# we would simply lose their values during an onchange!
continue
target = env[field.model_name]
computed = target.browse(env.computed[field])
if path == 'id':
target = records - computed
elif path:
target = (target.browse(env.cache[field]) - computed).filtered(
lambda rec: rec._mapped_cache(path) & records
)
else:
target = target.browse(env.cache[field]) - computed
if target:
spec.append((field, target._ids))
return spec
class Boolean(Field):
type = 'boolean'
def convert_to_cache(self, value, record, validate=True):
return bool(value)
def convert_to_export(self, value, env):
if env.context.get('export_raw_data'):
return value
return ustr(value)
class Integer(Field):
type = 'integer'
_slots = {
'group_operator': None, # operator for aggregating values
}
_related_group_operator = property(attrgetter('group_operator'))
_description_group_operator = property(attrgetter('group_operator'))
_column_group_operator = property(attrgetter('group_operator'))
def convert_to_cache(self, value, record, validate=True):
if isinstance(value, dict):
# special case, when an integer field is used as inverse for a one2many
return value.get('id', False)
return int(value or 0)
def convert_to_read(self, value, use_name_get=True):
# Integer values greater than 2^31-1 are not supported in pure XMLRPC,
# so we have to pass them as floats :-(
if value and value > xmlrpclib.MAXINT:
return float(value)
return value
def _update(self, records, value):
# special case, when an integer field is used as inverse for a one2many
records._cache[self] = value.id or 0
def convert_to_export(self, value, env):
if value or value == 0:
return value if env.context.get('export_raw_data') else ustr(value)
return ''
class Float(Field):
""" The precision digits are given by the attribute
:param digits: a pair (total, decimal), or a function taking a database
cursor and returning a pair (total, decimal)
"""
type = 'float'
_slots = {
'_digits': None, # digits argument passed to class initializer
'group_operator': None, # operator for aggregating values
}
def __init__(self, string=None, digits=None, **kwargs):
super(Float, self).__init__(string=string, _digits=digits, **kwargs)
@property
def digits(self):
if callable(self._digits):
with LazyCursor() as cr:
return self._digits(cr)
else:
return self._digits
def _setup_digits(self, env):
""" Setup the digits for ``self`` and its corresponding column """
pass
def _setup_regular(self, env):
super(Float, self)._setup_regular(env)
self._setup_digits(env)
_related__digits = property(attrgetter('_digits'))
_related_group_operator = property(attrgetter('group_operator'))
_description_digits = property(attrgetter('digits'))
_description_group_operator = property(attrgetter('group_operator'))
_column_digits = property(lambda self: not callable(self._digits) and self._digits)
_column_digits_compute = property(lambda self: callable(self._digits) and self._digits)
_column_group_operator = property(attrgetter('group_operator'))
def convert_to_cache(self, value, record, validate=True):
# apply rounding here, otherwise value in cache may be wrong!
value = float(value or 0.0)
if not validate:
return value
digits = self.digits
return float_round(value, precision_digits=digits[1]) if digits else value
def convert_to_export(self, value, env):
if value or value == 0.0:
return value if env.context.get('export_raw_data') else ustr(value)
return ''
class _String(Field):
""" Abstract class for string fields. """
_slots = {
'translate': False, # whether the field is translated
}
_column_translate = property(attrgetter('translate'))
_related_translate = property(attrgetter('translate'))
_description_translate = property(attrgetter('translate'))
class Char(_String):
""" Basic string field, can be length-limited, usually displayed as a
single-line string in clients
:param int size: the maximum size of values stored for that field
:param bool translate: whether the values of this field can be translated
"""
type = 'char'
_slots = {
'size': None, # maximum size of values (deprecated)
}
_column_size = property(attrgetter('size'))
_related_size = property(attrgetter('size'))
_description_size = property(attrgetter('size'))
def _setup_regular(self, env):
super(Char, self)._setup_regular(env)
assert isinstance(self.size, (NoneType, int)), \
"Char field %s with non-integer size %r" % (self, self.size)
def convert_to_cache(self, value, record, validate=True):
if value is None or value is False:
return False
return ustr(value)[:self.size]
class Text(_String):
""" Very similar to :class:`~.Char` but used for longer contents, does not
have a size and usually displayed as a multiline text box.
:param translate: whether the value of this field can be translated
"""
type = 'text'
def convert_to_cache(self, value, record, validate=True):
if value is None or value is False:
return False
return ustr(value)
class Html(_String):
type = 'html'
_slots = {
'sanitize': True, # whether value must be sanitized
'strip_style': False, # whether to strip style attributes
}
_column_sanitize = property(attrgetter('sanitize'))
_related_sanitize = property(attrgetter('sanitize'))
_description_sanitize = property(attrgetter('sanitize'))
_column_strip_style = property(attrgetter('strip_style'))
_related_strip_style = property(attrgetter('strip_style'))
_description_strip_style = property(attrgetter('strip_style'))
def convert_to_cache(self, value, record, validate=True):
if value is None or value is False:
return False
if validate and self.sanitize:
return html_sanitize(value, strip_style=self.strip_style)
return value
class Date(Field):
type = 'date'
@staticmethod
def today(*args):
""" Return the current day in the format expected by the ORM.
This function may be used to compute default values.
"""
return date.today().strftime(DATE_FORMAT)
@staticmethod
def context_today(record, timestamp=None):
""" Return the current date as seen in the client's timezone in a format
fit for date fields. This method may be used to compute default
values.
:param datetime timestamp: optional datetime value to use instead of
the current date and time (must be a datetime, regular dates
can't be converted between timezones.)
:rtype: str
"""
today = timestamp or datetime.now()
context_today = None
tz_name = record._context.get('tz') or record.env.user.tz
if tz_name:
try:
today_utc = pytz.timezone('UTC').localize(today, is_dst=False) # UTC = no DST
context_today = today_utc.astimezone(pytz.timezone(tz_name))
except Exception:
_logger.debug("failed to compute context/client-specific today date, using UTC value for `today`",
exc_info=True)
return (context_today or today).strftime(DATE_FORMAT)
@staticmethod
def from_string(value):
""" Convert an ORM ``value`` into a :class:`date` value. """
if not value:
return None
value = value[:DATE_LENGTH]
return datetime.strptime(value, DATE_FORMAT).date()
@staticmethod
def to_string(value):
""" Convert a :class:`date` value into the format expected by the ORM. """
return value.strftime(DATE_FORMAT) if value else False
def convert_to_cache(self, value, record, validate=True):
if not value:
return False
if isinstance(value, basestring):
if validate:
# force parsing for validation
self.from_string(value)
return value[:DATE_LENGTH]
return self.to_string(value)
def convert_to_export(self, value, env):
if not value:
return ''
return self.from_string(value) if env.context.get('export_raw_data') else ustr(value)
class Datetime(Field):
type = 'datetime'
@staticmethod
def now(*args):
""" Return the current day and time in the format expected by the ORM.
This function may be used to compute default values.
"""
return datetime.now().strftime(DATETIME_FORMAT)
@staticmethod
def context_timestamp(record, timestamp):
"""Returns the given timestamp converted to the client's timezone.
This method is *not* meant for use as a _defaults initializer,
because datetime fields are automatically converted upon
display on client side. For _defaults you :meth:`fields.datetime.now`
should be used instead.
:param datetime timestamp: naive datetime value (expressed in UTC)
to be converted to the client timezone
:rtype: datetime
:return: timestamp converted to timezone-aware datetime in context
timezone
"""
assert isinstance(timestamp, datetime), 'Datetime instance expected'
tz_name = record._context.get('tz') or record.env.user.tz
utc_timestamp = pytz.utc.localize(timestamp, is_dst=False) # UTC = no DST
if tz_name:
try:
context_tz = pytz.timezone(tz_name)
return utc_timestamp.astimezone(context_tz)
except Exception:
_logger.debug("failed to compute context/client-specific timestamp, "
"using the UTC value",
exc_info=True)
return utc_timestamp
@staticmethod
def from_string(value):
""" Convert an ORM ``value`` into a :class:`datetime` value. """
if not value:
return None
value = value[:DATETIME_LENGTH]
if len(value) == DATE_LENGTH:
value += " 00:00:00"
return datetime.strptime(value, DATETIME_FORMAT)
@staticmethod
def to_string(value):
""" Convert a :class:`datetime` value into the format expected by the ORM. """
return value.strftime(DATETIME_FORMAT) if value else False
def convert_to_cache(self, value, record, validate=True):
if not value:
return False
if isinstance(value, basestring):
if validate:
# force parsing for validation
self.from_string(value)
value = value[:DATETIME_LENGTH]
if len(value) == DATE_LENGTH:
value += " 00:00:00"
return value
return self.to_string(value)
def convert_to_export(self, value, env):
if not value:
return ''
return self.from_string(value) if env.context.get('export_raw_data') else ustr(value)
def convert_to_display_name(self, value, record=None):
assert record, 'Record expected'
return Datetime.to_string(Datetime.context_timestamp(record, Datetime.from_string(value)))
class Binary(Field):
type = 'binary'
class Selection(Field):
"""
:param selection: specifies the possible values for this field.
It is given as either a list of pairs (``value``, ``string``), or a
model method, or a method name.
:param selection_add: provides an extension of the selection in the case
of an overridden field. It is a list of pairs (``value``, ``string``).
The attribute ``selection`` is mandatory except in the case of
:ref:`related fields <field-related>` or :ref:`field extensions
<field-incremental-definition>`.
"""
type = 'selection'
_slots = {
'selection': None, # [(value, string), ...], function or method name
}
def __init__(self, selection=None, string=None, **kwargs):
if callable(selection):
from openerp import api
selection = api.expected(api.model, selection)
super(Selection, self).__init__(selection=selection, string=string, **kwargs)
def _setup_regular(self, env):
super(Selection, self)._setup_regular(env)
assert self.selection is not None, "Field %s without selection" % self
def _setup_related(self, env):
super(Selection, self)._setup_related(env)
# selection must be computed on related field
field = self.related_field
self.selection = lambda model: field._description_selection(model.env)
def set_class_name(self, cls, name):
super(Selection, self).set_class_name(cls, name)
# determine selection (applying 'selection_add' extensions)
for field in resolve_all_mro(cls, name, reverse=True):
if isinstance(field, type(self)):
# We cannot use field.selection or field.selection_add here
# because those attributes are overridden by ``set_class_name``.
if 'selection' in field._attrs:
self.selection = field._attrs['selection']
if 'selection_add' in field._attrs:
# use an OrderedDict to update existing values
selection_add = field._attrs['selection_add']
self.selection = OrderedDict(self.selection + selection_add).items()
else:
self.selection = None
def _description_selection(self, env):
""" return the selection list (pairs (value, label)); labels are
translated according to context language
"""
selection = self.selection
if isinstance(selection, basestring):
return getattr(env[self.model_name], selection)()
if callable(selection):
return selection(env[self.model_name])
# translate selection labels
if env.lang:
name = "%s,%s" % (self.model_name, self.name)
translate = partial(
env['ir.translation']._get_source, name, 'selection', env.lang)
return [(value, translate(label) if label else label) for value, label in selection]
else:
return selection
@property
def _column_selection(self):
if isinstance(self.selection, basestring):
method = self.selection
return lambda self, *a, **kw: getattr(self, method)(*a, **kw)
else:
return self.selection
def get_values(self, env):
""" return a list of the possible values """
selection = self.selection
if isinstance(selection, basestring):
selection = getattr(env[self.model_name], selection)()
elif callable(selection):
selection = selection(env[self.model_name])
return [value for value, _ in selection]
def convert_to_cache(self, value, record, validate=True):
if not validate:
return value or False
if value in self.get_values(record.env):
return value
elif not value:
return False
raise ValueError("Wrong value for %s: %r" % (self, value))
def convert_to_export(self, value, env):
if not isinstance(self.selection, list):
# FIXME: this reproduces an existing buggy behavior!
return value if value else ''
for item in self._description_selection(env):
if item[0] == value:
return item[1]
return False
class Reference(Selection):
type = 'reference'
_slots = {
'size': None, # maximum size of values (deprecated)
}
_related_size = property(attrgetter('size'))
_column_size = property(attrgetter('size'))
def _setup_regular(self, env):
super(Reference, self)._setup_regular(env)
assert isinstance(self.size, (NoneType, int)), \
"Reference field %s with non-integer size %r" % (self, self.size)
def convert_to_cache(self, value, record, validate=True):
if isinstance(value, BaseModel):
if ((not validate or value._name in self.get_values(record.env))
and len(value) <= 1):
return value.with_env(record.env) or False
elif isinstance(value, basestring):
res_model, res_id = value.split(',')
return record.env[res_model].browse(int(res_id))
elif not value:
return False
raise ValueError("Wrong value for %s: %r" % (self, value))
def convert_to_read(self, value, use_name_get=True):
return "%s,%s" % (value._name, value.id) if value else False
def convert_to_export(self, value, env):
return value.name_get()[0][1] if value else ''
def convert_to_display_name(self, value, record=None):
return ustr(value and value.display_name)
class _Relational(Field):
""" Abstract class for relational fields. """
relational = True
_slots = {
'domain': [], # domain for searching values
'context': {}, # context for searching values
}
def _setup_regular(self, env):
super(_Relational, self)._setup_regular(env)
if self.comodel_name not in env.registry:
_logger.warning("Field %s with unknown comodel_name %r"
% (self, self.comodel_name))
self.comodel_name = '_unknown'
@property
def _related_domain(self):
if callable(self.domain):
# will be called with another model than self's
return lambda recs: self.domain(recs.env[self.model_name])
else:
# maybe not correct if domain is a string...
return self.domain
_related_context = property(attrgetter('context'))
_description_relation = property(attrgetter('comodel_name'))
_description_context = property(attrgetter('context'))
def _description_domain(self, env):
return self.domain(env[self.model_name]) if callable(self.domain) else self.domain
_column_obj = property(attrgetter('comodel_name'))
_column_domain = property(attrgetter('domain'))
_column_context = property(attrgetter('context'))
def null(self, env):
return env[self.comodel_name]
def modified(self, records):
# Invalidate cache for self.inverse_fields, too. Note that recomputation
# of fields that depend on self.inverse_fields is already covered by the
# triggers (see above).
spec = super(_Relational, self).modified(records)
for invf in self.inverse_fields:
spec.append((invf, None))
return spec
class Many2one(_Relational):
""" The value of such a field is a recordset of size 0 (no
record) or 1 (a single record).
:param comodel_name: name of the target model (string)
:param domain: an optional domain to set on candidate values on the
client side (domain or string)
:param context: an optional context to use on the client side when
handling that field (dictionary)
:param ondelete: what to do when the referred record is deleted;
possible values are: ``'set null'``, ``'restrict'``, ``'cascade'``
:param auto_join: whether JOINs are generated upon search through that
field (boolean, by default ``False``)
:param delegate: set it to ``True`` to make fields of the target model
accessible from the current model (corresponds to ``_inherits``)
The attribute ``comodel_name`` is mandatory except in the case of related
fields or field extensions.
"""
type = 'many2one'
_slots = {
'ondelete': 'set null', # what to do when value is deleted
'auto_join': False, # whether joins are generated upon search
'delegate': False, # whether self implements delegation
}
def __init__(self, comodel_name=None, string=None, **kwargs):
super(Many2one, self).__init__(comodel_name=comodel_name, string=string, **kwargs)
def set_class_name(self, cls, name):
super(Many2one, self).set_class_name(cls, name)
# determine self.delegate
if not self.delegate:
self.delegate = name in cls._inherits.values()
_column_ondelete = property(attrgetter('ondelete'))
_column_auto_join = property(attrgetter('auto_join'))
def _update(self, records, value):
""" Update the cached value of ``self`` for ``records`` with ``value``. """
records._cache[self] = value
def convert_to_cache(self, value, record, validate=True):
if isinstance(value, (NoneType, int, long)):
return record.env[self.comodel_name].browse(value)
if isinstance(value, BaseModel):
if value._name == self.comodel_name and len(value) <= 1:
return value.with_env(record.env)
raise ValueError("Wrong value for %s: %r" % (self, value))
elif isinstance(value, tuple):
return record.env[self.comodel_name].browse(value[0])
elif isinstance(value, dict):
return record.env[self.comodel_name].new(value)
else:
return self.null(record.env)
def convert_to_read(self, value, use_name_get=True):
if use_name_get and value:
# evaluate name_get() as superuser, because the visibility of a
# many2one field value (id and name) depends on the current record's
# access rights, and not the value's access rights.
try:
value_sudo = value.sudo()
# performance trick: make sure that all records of the same
# model as value in value.env will be prefetched in value_sudo.env
value_sudo.env.prefetch[value._name].update(value.env.prefetch[value._name])
return value_sudo.name_get()[0]
except MissingError:
# Should not happen, unless the foreign key is missing.
return False
else:
return value.id
def convert_to_write(self, value, target=None, fnames=None):
return value.id
def convert_to_onchange(self, value):
return value.id
def convert_to_export(self, value, env):
return value.name_get()[0][1] if value else ''
def convert_to_display_name(self, value, record=None):
return ustr(value.display_name)
class UnionUpdate(SpecialValue):
""" Placeholder for a value update; when this value is taken from the cache,
it returns ``record[field.name] | value`` and stores it in the cache.
"""
def __init__(self, field, record, value):
self.args = (field, record, value)
def get(self):
field, record, value = self.args
# in order to read the current field's value, remove self from cache
del record._cache[field]
# read the current field's value, and update it in cache only
record._cache[field] = new_value = record[field.name] | value
return new_value
class _RelationalMulti(_Relational):
""" Abstract class for relational fields *2many. """
def _update(self, records, value):
""" Update the cached value of ``self`` for ``records`` with ``value``. """
for record in records:
if self in record._cache:
record._cache[self] = record[self.name] | value
else:
record._cache[self] = UnionUpdate(self, record, value)
def convert_to_cache(self, value, record, validate=True):
if isinstance(value, BaseModel):
if value._name == self.comodel_name:
return value.with_env(record.env)
elif isinstance(value, list):
# value is a list of record ids or commands
comodel = record.env[self.comodel_name]
ids = OrderedSet(record[self.name].ids)
# modify ids with the commands
for command in value:
if isinstance(command, (tuple, list)):
if command[0] == 0:
ids.add(comodel.new(command[2]).id)
elif command[0] == 1:
comodel.browse(command[1]).update(command[2])
ids.add(command[1])
elif command[0] == 2:
# note: the record will be deleted by write()
ids.discard(command[1])
elif command[0] == 3:
ids.discard(command[1])
elif command[0] == 4:
ids.add(command[1])
elif command[0] == 5:
ids.clear()
elif command[0] == 6:
ids = OrderedSet(command[2])
elif isinstance(command, dict):
ids.add(comodel.new(command).id)
else:
ids.add(command)
# return result as a recordset
return comodel.browse(list(ids))
elif not value:
return self.null(record.env)
raise ValueError("Wrong value for %s: %s" % (self, value))
def convert_to_read(self, value, use_name_get=True):
return value.ids
def convert_to_write(self, value, target=None, fnames=None):
# remove/delete former records
if target is None:
set_ids = []
result = [(6, 0, set_ids)]
add_existing = lambda id: set_ids.append(id)
else:
tag = 2 if self.type == 'one2many' else 3
result = [(tag, record.id) for record in target[self.name] - value]
add_existing = lambda id: result.append((4, id))
if fnames is None:
# take all fields in cache, except the inverses of self
fnames = set(value._fields) - set(MAGIC_COLUMNS)
for invf in self.inverse_fields:
fnames.discard(invf.name)
# add new and existing records
for record in value:
if not record.id:
values = {k: v for k, v in record._cache.iteritems() if k in fnames}
values = record._convert_to_write(values)
result.append((0, 0, values))
elif record._is_dirty():
values = {k: record._cache[k] for k in record._get_dirty() if k in fnames}
values = record._convert_to_write(values)
result.append((1, record.id, values))
else:
add_existing(record.id)
return result
def convert_to_export(self, value, env):
return ','.join(name for id, name in value.name_get()) if value else ''
def convert_to_display_name(self, value, record=None):
raise NotImplementedError()
def _compute_related(self, records):
""" Compute the related field ``self`` on ``records``. """
super(_RelationalMulti, self)._compute_related(records)
if self.related_sudo:
# determine which records in the relation are actually accessible
target = records.mapped(self.name)
target_ids = set(target.search([('id', 'in', target.ids)]).ids)
accessible = lambda target: target.id in target_ids
# filter values to keep the accessible records only
for record in records:
record[self.name] = record[self.name].filtered(accessible)
def setup_triggers(self, env):
super(_RelationalMulti, self).setup_triggers(env)
# also invalidate self when fields appearing in the domain are modified
if isinstance(self.domain, list):
comodel = env[self.comodel_name]
for arg in self.domain:
if isinstance(arg, (tuple, list)) and isinstance(arg[0], basestring):
self._setup_dependency([self.name], comodel, arg[0].split('.'))
class One2many(_RelationalMulti):
""" One2many field; the value of such a field is the recordset of all the
records in ``comodel_name`` such that the field ``inverse_name`` is equal to
the current record.
:param comodel_name: name of the target model (string)
:param inverse_name: name of the inverse ``Many2one`` field in
``comodel_name`` (string)
:param domain: an optional domain to set on candidate values on the
client side (domain or string)
:param context: an optional context to use on the client side when
handling that field (dictionary)
:param auto_join: whether JOINs are generated upon search through that
field (boolean, by default ``False``)
:param limit: optional limit to use upon read (integer)
The attributes ``comodel_name`` and ``inverse_name`` are mandatory except in
the case of related fields or field extensions.
"""
type = 'one2many'
_slots = {
'inverse_name': None, # name of the inverse field
'auto_join': False, # whether joins are generated upon search
'limit': None, # optional limit to use upon read
'copy': False, # o2m are not copied by default
}
def __init__(self, comodel_name=None, inverse_name=None, string=None, **kwargs):
super(One2many, self).__init__(
comodel_name=comodel_name,
inverse_name=inverse_name,
string=string,
**kwargs
)
def _setup_regular(self, env):
super(One2many, self)._setup_regular(env)
if self.inverse_name:
# link self to its inverse field and vice-versa
comodel = env[self.comodel_name]
invf = comodel._fields[self.inverse_name]
# In some rare cases, a ``One2many`` field can link to ``Int`` field
# (res_model/res_id pattern). Only inverse the field if this is
# a ``Many2one`` field.
if isinstance(invf, Many2one):
self.inverse_fields += (invf,)
invf.inverse_fields += (self,)
_description_relation_field = property(attrgetter('inverse_name'))
_column_fields_id = property(attrgetter('inverse_name'))
_column_auto_join = property(attrgetter('auto_join'))
_column_limit = property(attrgetter('limit'))
class Many2many(_RelationalMulti):
""" Many2many field; the value of such a field is the recordset.
:param comodel_name: name of the target model (string)
The attribute ``comodel_name`` is mandatory except in the case of related
fields or field extensions.
:param relation: optional name of the table that stores the relation in
the database (string)
:param column1: optional name of the column referring to "these" records
in the table ``relation`` (string)
:param column2: optional name of the column referring to "those" records
in the table ``relation`` (string)
The attributes ``relation``, ``column1`` and ``column2`` are optional. If not
given, names are automatically generated from model names, provided
``model_name`` and ``comodel_name`` are different!
:param domain: an optional domain to set on candidate values on the
client side (domain or string)
:param context: an optional context to use on the client side when
handling that field (dictionary)
:param limit: optional limit to use upon read (integer)
"""
type = 'many2many'
_slots = {
'relation': None, # name of table
'column1': None, # column of table referring to model
'column2': None, # column of table referring to comodel
'limit': None, # optional limit to use upon read
}
def __init__(self, comodel_name=None, relation=None, column1=None, column2=None,
string=None, **kwargs):
super(Many2many, self).__init__(
comodel_name=comodel_name,
relation=relation,
column1=column1,
column2=column2,
string=string,
**kwargs
)
def _setup_regular(self, env):
super(Many2many, self)._setup_regular(env)
if not self.relation and self.store:
# retrieve self.relation from the corresponding column
column = self.to_column()
if isinstance(column, fields.many2many):
self.relation, self.column1, self.column2 = \
column._sql_names(env[self.model_name])
if self.relation:
m2m = env.registry._m2m
# if inverse field has already been setup, it is present in m2m
invf = m2m.get((self.relation, self.column2, self.column1))
if invf:
self.inverse_fields += (invf,)
invf.inverse_fields += (self,)
else:
# add self in m2m, so that its inverse field can find it
m2m[(self.relation, self.column1, self.column2)] = self
_column_rel = property(attrgetter('relation'))
_column_id1 = property(attrgetter('column1'))
_column_id2 = property(attrgetter('column2'))
_column_limit = property(attrgetter('limit'))
class Serialized(Field):
""" Minimal support for existing sparse and serialized fields. """
type = 'serialized'
def convert_to_cache(self, value, record, validate=True):
return value or {}
class Id(Field):
""" Special case for field 'id'. """
type = 'integer'
_slots = {
'string': 'ID',
'store': True,
'readonly': True,
}
def to_column(self):
self.column = fields.integer(self.string)
return self.column
def __get__(self, record, owner):
if record is None:
return self # the field is accessed through the class owner
if not record:
return False
return record.ensure_one()._ids[0]
def __set__(self, record, value):
raise TypeError("field 'id' cannot be assigned")
# imported here to avoid dependency cycle issues
from openerp import SUPERUSER_ID
from .exceptions import Warning, AccessError, MissingError
from .models import BaseModel, MAGIC_COLUMNS
from .osv import fields