239 lines
8.9 KiB
Python
239 lines
8.9 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 itertools import chain
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from trytond.model.fields.field import Field, size_validate
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from trytond.transaction import Transaction
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from trytond.pool import Pool
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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, size=None, help='', required=False,
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readonly=False, domain=None, states=None, on_change=None,
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on_change_with=None, depends=None, order_field=None, context=None,
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loading='lazy'):
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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, states=states,
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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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loading=loading)
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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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self.__size = None
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self.size = size
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__init__.__doc__ += Field.__init__.__doc__
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def _get_size(self):
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return self.__size
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def _set_size(self, value):
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size_validate(value)
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self.__size = value
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size = property(_get_size, _set_size)
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def get(self, ids, model, name, values=None):
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'''
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Return target records ordered.
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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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if self.order is None:
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order = [(self.target, 'ASC')]
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else:
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order = self.order
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Relation = Pool().get(self.relation_name)
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if self.origin in Relation._fields:
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origin_field = Relation._fields[self.origin]
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else:
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origin_field = Relation._inherit_fields[self.origin][2]
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relations = []
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for i in range(0, len(ids), Transaction().cursor.IN_MAX):
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sub_ids = ids[i:i + Transaction().cursor.IN_MAX]
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if origin_field._type == 'reference':
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references = ['%s,%s' % (model.__name__, x) for x in sub_ids]
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clause = [(self.origin, 'in', references)]
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else:
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clause = [(self.origin, 'in', sub_ids)]
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clause += [(self.target + '.id', '!=', None)]
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relations.append(Relation.search(clause, order=order))
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relations = list(chain(*relations))
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for relation in relations:
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origin_id = getattr(relation, self.origin).id
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res[origin_id].append(getattr(relation, self.target).id)
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return dict((key, tuple(value)) for key, value in res.iteritems())
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def set(self, ids, model, name, values):
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'''
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Set the values.
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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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(``delete_all``),
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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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'''
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pool = Pool()
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if not values:
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return
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Relation = pool.get(self.relation_name)
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Target = self.get_target()
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if self.origin in Relation._fields:
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origin_field = Relation._fields[self.origin]
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else:
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origin_field = Relation._inherit_fields[self.origin][2]
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def search_clause(ids):
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if origin_field._type == 'reference':
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references = ['%s,%s' % (model.__name__, x) for x in ids]
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return (self.origin, 'in', references)
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else:
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return (self.origin, 'in', ids)
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def field_value(record_id):
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if origin_field._type == 'reference':
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return '%s,%s' % (model.__name__, record_id)
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else:
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return record_id
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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.create({
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self.origin: field_value(record_id),
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self.target: Target.create(act[1]).id,
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})
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elif act[0] == 'write':
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Target.write(Target.browse(act[1]), act[2])
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elif act[0] == 'delete':
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Target.delete(Target.browse(act[1]))
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elif act[0] == 'delete_all':
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relations = Relation.search([
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search_clause(ids),
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])
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Target.delete([getattr(r, self.target) for r in relations
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if getattr(r, self.target)])
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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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relations = []
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for i in range(0, len(target_ids),
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Transaction().cursor.IN_MAX):
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sub_ids = target_ids[i:i + Transaction().cursor.IN_MAX]
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relations += Relation.search([
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search_clause(ids),
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(self.target, 'in', sub_ids),
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])
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Relation.delete(relations)
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elif act[0] == 'add':
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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),
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Transaction().cursor.IN_MAX):
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sub_ids = target_ids[i:i + Transaction().cursor.IN_MAX]
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relations = Relation.search([
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search_clause(ids),
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(self.target, 'in', sub_ids),
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])
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for relation in relations:
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existing_ids.append(getattr(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.create({
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self.origin: field_value(record_id),
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self.target: new_id,
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})
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elif act[0] == 'unlink_all':
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targets = Relation.search([
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search_clause(ids),
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(self.target + '.id', '!=', None),
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])
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Relation.delete(targets)
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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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targets2 = Relation.search([
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search_clause(ids),
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(self.target + '.id', '!=', None),
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])
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Relation.delete(targets2)
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for new_id in target_ids:
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for record_id in ids:
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Relation.create({
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self.origin: field_value(record_id),
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self.target: new_id,
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})
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else:
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raise Exception('Bad arguments')
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def get_target(self):
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'Return the target model'
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Relation = Pool().get(self.relation_name)
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if not self.target:
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return Relation
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if self.target in Relation._fields:
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return Relation._fields[self.target].get_target()
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else:
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return Relation._inherit_fields[self.target][2].get_target()
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def __set__(self, inst, value):
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Target = self.get_target()
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def instance(data):
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if isinstance(data, Target):
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return data
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elif isinstance(data, dict):
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return Target(**data)
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else:
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return Target(data)
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value = [instance(x) for x in (value or [])]
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super(Many2Many, self).__set__(inst, value)
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