201 lines
8.2 KiB
Python
201 lines
8.2 KiB
Python
#This file is part of Tryton. The COPYRIGHT file at the top level of
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#this repository contains the full copyright notices and license terms.
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from trytond.model.fields.field import Field
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from itertools import chain
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class Many2Many(Field):
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'''
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Define many2many field (``list``).
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'''
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_type = 'many2many'
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def __init__(self, relation_name, origin, target, string='', order=None,
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datetime_field=None, help='', required=False, readonly=False,
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domain=None, states=None, priority=0, change_default=False,
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select=0, on_change=None, on_change_with=None, depends=None,
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order_field=None, context=None):
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'''
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:param relation_name: The name of the relation model
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or the name of the target model for ModelView only.
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:param origin: The name of the field to store origin ids.
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:param target: The name of the field to store target ids.
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:param order: a list of tuples that are constructed like this:
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``('field name', 'DESC|ASC')``
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allowing to specify the order of result
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:param datetime_field: The name of the field that contains the datetime
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value to read the target records.
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'''
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if datetime_field:
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if depends:
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depends.append(datetime_field)
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else:
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depends = [datetime_field]
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super(Many2Many, self).__init__(string=string, help=help,
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required=required, readonly=readonly, domain=domain,
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states=states, priority=priority,
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change_default=change_default, select=select,
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on_change=on_change, on_change_with=on_change_with,
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depends=depends, order_field=order_field, context=context)
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self.relation_name = relation_name
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self.origin = origin
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self.target = target
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self.order = order
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self.datetime_field = datetime_field
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__init__.__doc__ += Field.__init__.__doc__
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def get(self, cursor, user, ids, model, name, values=None, context=None):
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'''
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Return target records ordered.
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:param cursor: the database cursor
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:param user: the user id
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:param ids: a list of ids
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:param model: a string with the name of the model
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:param name: a string with the name of the field
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:param values: a dictionary with the read values
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:param context: the context
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:return: a dictionary with ids as key and values as value
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'''
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if values is None:
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values = {}
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res = {}
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if not ids:
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return res
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for i in ids:
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res[i] = []
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relation_obj = model.pool.get(self.relation_name)
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relation_ids = []
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for i in range(0, len(ids), cursor.IN_MAX):
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sub_ids = ids[i:i + cursor.IN_MAX]
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relation_ids.append(relation_obj.search(cursor, user, [
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(self.origin, 'in', sub_ids),
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(self.target + '.id', '!=', False),
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], order=self.order, context=context))
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relation_ids = list(chain(*relation_ids))
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for relation in relation_obj.read(cursor, user, relation_ids,
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[self.origin, self.target], context=context):
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res[relation[self.origin]].append(relation[self.target])
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return res
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def set(self, cursor, user, ids, model, name, values, context=None):
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'''
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Set the values.
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:param cursor: The database cursor
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:param user: The user id
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:param ids: A list of ids
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:param model: A string with the name of the model
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:param name: A string with the name of the field
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:param values: A list of tuples:
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(``create``, ``{<field name>: value}``),
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(``write``, ``<ids>``, ``{<field name>: value}``),
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(``delete``, ``<ids>``),
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(``unlink``, ``<ids>``),
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(``add``, ``<ids>``),
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(``unlink_all``),
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(``set``, ``<ids>``)
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:param context: The context
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'''
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if not values:
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return
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relation_obj = model.pool.get(self.relation_name)
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target_obj = self.get_target(model.pool)
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for act in values:
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if act[0] == 'create':
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for record_id in ids:
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relation_obj.create(cursor, user, {
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self.origin: record_id,
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self.target: target_obj.create(cursor, user, act[1],
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context=context),
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}, context=context)
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elif act[0] == 'write':
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target_obj.write(cursor, user, act[1] , act[2], context=context)
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elif act[0] == 'delete':
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target_obj.delete(cursor, user, act[1], context=context)
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elif act[0] == 'unlink':
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if isinstance(act[1], (int, long)):
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target_ids = [act[1]]
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else:
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target_ids = list(act[1])
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if not target_ids:
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continue
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relation_ids = []
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for i in range(0, len(target_ids), cursor.IN_MAX):
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sub_ids = target_ids[i:i + cursor.IN_MAX]
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relation_ids += relation_obj.search(cursor, user, [
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(self.origin, 'in', ids),
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(self.target, 'in', sub_ids),
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], context=context)
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relation_obj.delete(cursor, user, relation_ids, context=context)
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elif act[0] == 'add':
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if isinstance(act[1], (int, long)):
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target_ids = [act[1]]
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else:
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target_ids = list(act[1])
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if not target_ids:
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continue
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existing_ids = []
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for i in range(0, len(target_ids), cursor.IN_MAX):
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sub_ids = target_ids[i:i + cursor.IN_MAX]
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relation_ids = relation_obj.search(cursor, user, [
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(self.origin, 'in', ids),
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(self.target, 'in', sub_ids),
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], context=context)
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for relation in relation_obj.browse(cursor, user,
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relation_ids, context=context):
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existing_ids.append(relation[self.target].id)
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for new_id in (x for x in target_ids if x not in existing_ids):
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for record_id in ids:
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relation_obj.create(cursor, user, {
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self.origin: record_id,
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self.target: new_id,
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}, context=context)
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elif act[0] == 'unlink_all':
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target_ids = relation_obj.search(cursor, user, [
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(self.origin, 'in', ids),
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(self.target + '.id', '!=', False),
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], context=context)
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relation_obj.delete(cursor, user, target_ids, context=context)
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elif act[0] == 'set':
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if not act[1]:
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target_ids = []
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else:
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target_ids = list(act[1])
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target_ids2 = relation_obj.search(cursor, user, [
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(self.origin, 'in', ids),
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(self.target + '.id', '!=', False),
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], context=context)
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relation_obj.delete(cursor, user, target_ids2, context=context)
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for new_id in target_ids:
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for record_id in ids:
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relation_obj.create(cursor, user, {
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self.origin: record_id,
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self.target: new_id,
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}, context=context)
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else:
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raise Exception('Bad arguments')
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def get_target(self, pool):
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'''
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Return the target model.
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:param pool: The pool
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:return: A Model
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'''
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relation_obj = pool.get(self.relation_name)
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if not self.target:
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return relation_obj
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if self.target in relation_obj._columns:
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target_obj = pool.get(
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relation_obj._columns[self.target].model_name)
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else:
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target_obj = pool.get(
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relation_obj._inherit_fields[self.target][2].model_name)
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return target_obj
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