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#This file is part of Tryton. The COPYRIGHT file at the top level of
#this repository contains the full copyright notices and license terms.
from itertools import chain
from trytond.model.fields.field import Field
from trytond.transaction import Transaction
from trytond.pool import Pool
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, help='', required=False,
readonly=False, domain=None, states=None, change_default=False,
on_change=None, on_change_with=None, depends=None,
order_field=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.
: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, change_default=change_default,
on_change=on_change, on_change_with=on_change_with,
depends=depends, order_field=order_field, 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
__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(self, ids, model, name, values=None):
'''
Return target records ordered.
:param ids: a list of ids
:param model: a string with the name of the model
:param name: a string with the name of the field
:param values: a dictionary with the read values
:return: a dictionary with ids as key and values as value
'''
pool = Pool()
res = {}
for i in ids:
res[i] = []
ids2 = []
for i in range(0, len(ids), Transaction().cursor.IN_MAX):
sub_ids = ids[i:i + Transaction().cursor.IN_MAX]
ids2.append(pool.get(self.model_name).search([
(self.field, 'in', sub_ids),
], order=self.order))
cache = Transaction().cursor.get_cache(Transaction().context)
cache.setdefault(self.model_name, {})
ids3 = []
for i in chain(*ids2):
if i in cache[self.model_name] \
and self.field in cache[self.model_name][i]:
res[cache[self.model_name][i][self.field]].append(i)
else:
ids3.append(i)
if ids3:
for i in pool.get(self.model_name).read(ids3, [self.field]):
res[i[self.field]].append(i['id'])
index_of_ids2 = dict((i, index) for index, i in enumerate(chain(*ids2)))
for val in res.values():
val.sort(key=lambda x: index_of_ids2[x])
return res
def set(self, ids, model, name, values):
'''
Set the values.
:param ids: A list of ids
:param model: A string with the name of the model
:param name: A string with the name of the field
:param values: A list of tuples:
(``create``, ``{<field name>: value}``),
(``write``, ``<ids>``, ``{<field name>: value}``),
(``delete``, ``<ids>``),
(``delete_all``),
(``unlink``, ``<ids>``),
(``add``, ``<ids>``),
(``unlink_all``),
(``set``, ``<ids>``)
'''
pool = Pool()
if not values:
return
model = pool.get(self.model_name)
for act in values:
if act[0] == 'create':
for record_id in ids:
act[1][self.field] = record_id
model.create(act[1])
elif act[0] == 'write':
model.write(act[1] , act[2])
elif act[0] == 'delete':
model.delete(act[1])
elif act[0] == 'delete_all':
target_ids = model.search([
(self.field, 'in', ids),
])
model.delete(target_ids)
elif act[0] == 'unlink':
if isinstance(act[1], (int, long)):
target_ids = [act[1]]
else:
target_ids = list(act[1])
if not target_ids:
continue
target_ids = model.search([
(self.field, 'in', ids),
('id', 'in', target_ids),
])
model.write(target_ids, {
self.field: False,
})
elif act[0] == 'add':
if isinstance(act[1], (int, long)):
target_ids = [act[1]]
else:
target_ids = list(act[1])
if not target_ids:
continue
for record_id in ids:
model.write(target_ids, {
self.field: record_id,
})
elif act[0] == 'unlink_all':
target_ids = model.search([
(self.field, 'in', ids),
])
model.write(target_ids, {
self.field: False,
})
elif act[0] == 'set':
if not act[1]:
target_ids = [0]
else:
target_ids = list(act[1])
for record_id in ids:
target_ids2 = model.search([
(self.field, '=', record_id),
('id', 'not in', target_ids),
])
model.write(target_ids2, {
self.field: False,
})
if act[1]:
model.write(target_ids, {
self.field: record_id,
})
else:
raise Exception('Bad arguments')
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