141 lines
5.1 KiB
Python
141 lines
5.1 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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import warnings
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from sql import Cast, Literal, Query, Expression
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from sql.functions import Substring, Position
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from .field import Field, SQLType
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from .char import Char
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from ...transaction import Transaction
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from ...pool import Pool
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from ... import backend
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class Reference(Field):
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'''
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Define a reference field (``str``).
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'''
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_type = 'reference'
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def __init__(self, string='', selection=None, selection_change_with=None,
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help='', required=False, readonly=False, domain=None, states=None,
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select=False, on_change=None, on_change_with=None, depends=None,
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context=None, loading='lazy'):
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'''
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:param selection: A list or a function name that returns a list.
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The list must be a list of tuples. First member is an internal name
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of model and the second is the user name of model.
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'''
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super(Reference, self).__init__(string=string, help=help,
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required=required, readonly=readonly, domain=domain, states=states,
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select=select, on_change=on_change, on_change_with=on_change_with,
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depends=depends, context=context, loading=loading)
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self.selection = selection or None
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self.selection_change_with = set()
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if selection_change_with:
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warnings.warn('selection_change_with argument is deprecated, '
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'use the depends decorator',
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DeprecationWarning, stacklevel=2)
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self.selection_change_with |= set(selection_change_with)
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__init__.__doc__ += Field.__init__.__doc__
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def get(self, ids, model, name, values=None):
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'''
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Replace removed reference id by None.
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'''
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pool = Pool()
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if values is None:
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values = {}
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res = {}
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for i in values:
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res[i['id']] = i[name]
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ref_to_check = {}
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for i in ids:
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if not (i in res):
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res[i] = None
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continue
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if not res[i]:
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continue
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ref_model, ref_id = res[i].split(',', 1)
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if not ref_model:
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continue
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try:
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ref_id = int(ref_id)
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except Exception:
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continue
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if ref_id < 0:
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continue
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res[i] = ref_model + ',' + str(ref_id)
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ref_to_check.setdefault(ref_model, (set(), []))
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ref_to_check[ref_model][0].add(ref_id)
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ref_to_check[ref_model][1].append(i)
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# Check if reference ids still exist
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with Transaction().set_context(active_test=False), \
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Transaction().set_context(_check_access=False):
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for ref_model, (ref_ids, ids) in ref_to_check.iteritems():
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try:
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pool.get(ref_model)
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except KeyError:
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res.update(dict((i, None) for i in ids))
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continue
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Ref = pool.get(ref_model)
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refs = Ref.search([
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('id', 'in', list(ref_ids)),
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], order=[])
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refs = map(str, refs)
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for i in ids:
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if res[i] not in refs:
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res[i] = None
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return res
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def __set__(self, inst, value):
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from ..model import Model
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if not isinstance(value, (Model, type(None))):
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if isinstance(value, basestring):
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target, value = value.split(',')
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else:
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target, value = value
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Target = Pool().get(target)
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if isinstance(value, dict):
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value = Target(**value)
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else:
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value = Target(value)
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super(Reference, self).__set__(inst, value)
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@staticmethod
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def sql_format(value):
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if not isinstance(value, (basestring, Query, Expression)):
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try:
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value = '%s,%s' % tuple(value)
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except TypeError:
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pass
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return Char.sql_format(value)
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def sql_type(self):
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db_type = backend.name()
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if db_type == 'mysql':
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return SQLType('CHAR', 'VARCHAR(255)')
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return SQLType('VARCHAR', 'VARCHAR')
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def convert_domain(self, domain, tables, Model):
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if '.' not in domain[0]:
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return super(Reference, self).convert_domain(domain, tables, Model)
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pool = Pool()
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name, operator, value, target = domain[:4]
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Target = pool.get(target)
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table, _ = tables[None]
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name, target_name = name.split('.', 1)
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assert name == self.name
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column = self.sql_column(table)
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target_domain = [(target_name,) + tuple(domain[1:3])
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+ tuple(domain[4:])]
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if 'active' in Target._fields:
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target_domain.append(('active', 'in', [True, False]))
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query = Target.search(target_domain, order=[], query=True)
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return (Cast(Substring(column,
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Position(',', column) + Literal(1)),
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Model.id.sql_type().base).in_(query)
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& column.ilike(target + ',%'))
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