/usr/lib/python2.7/dist-packages/trytond/model/fields/one2many.py is in tryton-server 3.4.0-3+deb8u3.
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#this repository contains the full copyright notices and license terms.
from itertools import chain
from sql import Cast, Literal
from sql.functions import Substring, Position
from .field import Field, size_validate
from ...pool import Pool
from ...tools import grouped_slice
def add_remove_validate(value):
if value:
assert isinstance(value, list), 'add_remove must be a list'
class One2Many(Field):
'''
Define one2many field (``list``).
'''
_type = 'one2many'
def __init__(self, model_name, field, string='', add_remove=None,
order=None, datetime_field=None, size=None, help='',
required=False, readonly=False, domain=None, states=None,
on_change=None, on_change_with=None, depends=None,
context=None, loading='lazy'):
'''
:param model_name: The name of the target model.
:param field: The name of the field that handle the reverse many2one or
reference.
:param add_remove: A list that defines a domain on add/remove.
See domain on ModelStorage.search.
:param order: a list of tuples that are constructed like this:
``('field name', 'DESC|ASC')``
allowing to specify the order of result.
:param datetime_field: The name of the field that contains the datetime
value to read the target records.
'''
if datetime_field:
if depends:
depends.append(datetime_field)
else:
depends = [datetime_field]
super(One2Many, self).__init__(string=string, help=help,
required=required, readonly=readonly, domain=domain, states=states,
on_change=on_change, on_change_with=on_change_with,
depends=depends, context=context, loading=loading)
self.model_name = model_name
self.field = field
self.__add_remove = None
self.add_remove = add_remove
self.order = order
self.datetime_field = datetime_field
self.__size = None
self.size = size
__init__.__doc__ += Field.__init__.__doc__
def _get_add_remove(self):
return self.__add_remove
def _set_add_remove(self, value):
add_remove_validate(value)
self.__add_remove = value
add_remove = property(_get_add_remove, _set_add_remove)
def _get_size(self):
return self.__size
def _set_size(self, value):
size_validate(value)
self.__size = value
size = property(_get_size, _set_size)
def get(self, ids, model, name, values=None):
'''
Return target records ordered.
'''
pool = Pool()
Relation = pool.get(self.model_name)
field = Relation._fields[self.field]
res = {}
for i in ids:
res[i] = []
targets = []
for sub_ids in grouped_slice(ids):
if field._type == 'reference':
references = ['%s,%s' % (model.__name__, x) for x in sub_ids]
clause = [(self.field, 'in', references)]
else:
clause = [(self.field, 'in', list(sub_ids))]
targets.append(Relation.search(clause, order=self.order))
targets = list(chain(*targets))
for target in targets:
origin_id = getattr(target, self.field).id
res[origin_id].append(target.id)
return dict((key, tuple(value)) for key, value in res.iteritems())
def set(self, Model, name, ids, values, *args):
'''
Set the values.
values: A list of tuples:
(``create``, ``[{<field name>: value}, ...]``),
(``write``, [``<ids>``, ``{<field name>: value}``, ...]),
(``delete``, ``<ids>``),
(``add``, ``<ids>``),
(``remove``, ``<ids>``),
(``copy``, ``<ids>``, ``[{<field name>: value}, ...]``)
'''
Target = self.get_target()
field = Target._fields[self.field]
to_create = []
to_write = []
to_delete = []
def search_clause(ids):
if field._type == 'reference':
references = ['%s,%s' % (Model.__name__, x) for x in ids]
return (self.field, 'in', references)
else:
return (self.field, 'in', ids)
def field_value(record_id):
if field._type == 'reference':
return '%s,%s' % (Model.__name__, record_id)
else:
return record_id
def create(ids, vlist):
for record_id in ids:
value = field_value(record_id)
for values in vlist:
values = values.copy()
values[self.field] = value
to_create.append(values)
def write(_, *args):
actions = iter(args)
to_write.extend(sum(((Target.browse(ids), values)
for ids, values in zip(actions, actions)), ()))
def delete(_, target_ids):
to_delete.extend(Target.browse(target_ids))
def add(ids, target_ids):
target_ids = map(int, target_ids)
if not target_ids:
return
targets = Target.browse(target_ids)
for record_id in ids:
to_write.extend((targets, {
self.field: field_value(record_id),
}))
def remove(ids, target_ids):
target_ids = map(int, target_ids)
if not target_ids:
return
for sub_ids in grouped_slice(target_ids):
targets = Target.search([
search_clause(ids),
('id', 'in', list(sub_ids)),
])
to_write.extend((targets, {
self.field: None,
}))
def copy(ids, copy_ids, default=None):
copy_ids = map(int, copy_ids)
if default is None:
default = {}
default = default.copy()
copies = Target.browse(copy_ids)
for record_id in ids:
default[self.field] = field_value(record_id)
Target.copy(copies, default=default)
actions = {
'create': create,
'write': write,
'delete': delete,
'add': add,
'remove': remove,
'copy': copy,
}
args = iter((ids, values) + args)
for ids, values in zip(args, args):
if not values:
continue
for value in values:
action = value[0]
args = value[1:]
actions[action](ids, *args)
if to_create:
Target.create(to_create)
if to_write:
Target.write(*to_write)
if to_delete:
Target.delete(to_delete)
def get_target(self):
'Return the target Model'
return Pool().get(self.model_name)
def __set__(self, inst, value):
Target = self.get_target()
def instance(data):
if isinstance(data, Target):
return data
elif isinstance(data, dict):
return Target(**data)
else:
return Target(data)
value = [instance(x) for x in (value or [])]
super(One2Many, self).__set__(inst, value)
def convert_domain(self, domain, tables, Model):
Target = self.get_target()
target = Target.__table__()
table, _ = tables[None]
name, operator, value = domain[:3]
origin_field = Target._fields[self.field]
origin = getattr(Target, self.field).sql_column(target)
origin_where = None
if origin_field._type == 'reference':
origin_where = origin.like(Model.__name__ + ',%')
origin = Cast(Substring(origin,
Position(',', origin) + Literal(1)),
Target.id.sql_type().base)
if '.' not in name:
if value is None:
where = origin != value
if origin_where:
where &= origin_where
query = target.select(origin, where=where)
expression = ~table.id.in_(query)
if operator == '!=':
return ~expression
return expression
else:
if isinstance(value, basestring):
target_name = 'rec_name'
else:
target_name = 'id'
else:
_, target_name = name.split('.', 1)
target_domain = [(target_name,) + tuple(domain[1:])]
query = Target.search(target_domain, order=[], query=True)
where = target.id.in_(query)
if origin_where:
where &= origin_where
query = target.select(origin, where=where)
return table.id.in_(query)
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