239 lines
8.5 KiB
Python
239 lines
8.5 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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def add_remove_validate(value):
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if value:
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assert isinstance(value, list), 'add_remove must be a list'
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class One2Many(Field):
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'''
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Define one2many field (``list``).
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'''
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_type = 'one2many'
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def __init__(self, model_name, field, string='', add_remove=None,
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order=None, datetime_field=None, size=None, help='',
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required=False, readonly=False, domain=None, states=None,
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on_change=None, on_change_with=None, depends=None,
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order_field=None, context=None, loading='lazy'):
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'''
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:param model_name: The name of the target model.
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:param field: The name of the field that handle the reverse many2one or
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reference.
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:param add_remove: A list that defines a domain on add/remove.
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See domain on ModelStorage.search.
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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(One2Many, 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.model_name = model_name
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self.field = field
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self.__add_remove = None
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self.add_remove = add_remove
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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_add_remove(self):
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return self.__add_remove
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def _set_add_remove(self, value):
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add_remove_validate(value)
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self.__add_remove = value
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add_remove = property(_get_add_remove, _set_add_remove)
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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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pool = Pool()
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Relation = pool.get(self.model_name)
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if self.field in Relation._fields:
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field = Relation._fields[self.field]
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else:
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field = Relation._inherit_fields[self.field][2]
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res = {}
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for i in ids:
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res[i] = []
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ids2 = []
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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 field._type == 'reference':
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references = ['%s,%s' % (model.__name__, x) for x in sub_ids]
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clause = [(self.field, 'in', references)]
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else:
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clause = [(self.field, 'in', sub_ids)]
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ids2.append(map(int, Relation.search(clause, order=self.order)))
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cache = Transaction().cursor.get_cache(Transaction().context)
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cache.setdefault(self.model_name, {})
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ids3 = []
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for i in chain(*ids2):
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if i in cache[self.model_name] \
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and self.field in cache[self.model_name][i]:
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if field._type == 'reference':
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_, id_ = cache[self.model_name][i][self.field].split(',')
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id_ = int(id_)
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else:
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id_ = cache[self.model_name][i][self.field]
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res[id_].append(i)
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else:
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ids3.append(i)
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if ids3:
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for i in Relation.read(ids3, [self.field]):
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if field._type == 'reference':
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_, id_ = i[self.field].split(',')
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id_ = int(id_)
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else:
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id_ = i[self.field]
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res[id_].append(i['id'])
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index_of_ids2 = dict((i, index)
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for index, i in enumerate(chain(*ids2)))
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for id_, val in res.iteritems():
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res[id_] = tuple(sorted(val, key=lambda x: index_of_ids2[x]))
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return res
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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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if not values:
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return
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Target = self.get_target()
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if self.field in Target._fields:
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field = Target._fields[self.field]
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else:
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field = Target._inherit_fields[self.field][2]
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def search_clause(ids):
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if field._type == 'reference':
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references = ['%s,%s' % (model.__name__, x) for x in ids]
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return (self.field, 'in', references)
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else:
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return (self.field, 'in', ids)
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def field_value(record_id):
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if 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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act[1][self.field] = field_value(record_id)
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Target.create(act[1])
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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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targets = Target.search([
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search_clause(ids),
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])
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Target.delete(targets)
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elif act[0] == 'unlink':
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target_ids = map(int, act[1])
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if not target_ids:
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continue
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targets = Target.search([
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search_clause(ids),
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('id', 'in', target_ids),
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])
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Target.write(targets, {
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self.field: None,
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})
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elif act[0] == 'add':
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target_ids = map(int, act[1])
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if not target_ids:
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continue
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for record_id in ids:
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Target.write(Target.browse(target_ids), {
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self.field: field_value(record_id),
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})
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elif act[0] == 'unlink_all':
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targets = Target.search([
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search_clause(ids),
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])
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Target.write(targets, {
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self.field: None,
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})
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elif act[0] == 'set':
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if not act[1]:
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target_ids = [-1]
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else:
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target_ids = map(int, act[1])
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for record_id in ids:
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targets = Target.search([
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search_clause([record_id]),
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('id', 'not in', target_ids),
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])
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Target.write(targets, {
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self.field: None,
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})
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if act[1]:
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Target.write(Target.browse(target_ids), {
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self.field: field_value(record_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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return Pool().get(self.model_name)
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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(One2Many, self).__set__(inst, value)
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