/usr/lib/python3/dist-packages/trytond/model/fields/many2one.py is in tryton-server 4.6.3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 | # 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 sql import Literal, Column
from sql.aggregate import Max
from sql.conditionals import Coalesce
from sql.operators import Or
from .field import Field
from ...pool import Pool
from ...tools import reduce_ids
from ...transaction import Transaction
class Many2One(Field):
'''
Define many2one field (``int``).
'''
_type = 'many2one'
_sql_type = 'INTEGER'
def __init__(self, model_name, string='', left=None, right=None,
ondelete='SET NULL', datetime_field=None, target_search='join',
help='', required=False, readonly=False, domain=None, states=None,
select=False, on_change=None, on_change_with=None, depends=None,
context=None, loading='eager'):
'''
:param model_name: The name of the target model.
:param left: The name of the field to store the left value for
Modified Preorder Tree Traversal.
See http://en.wikipedia.org/wiki/Tree_traversal
:param right: The name of the field to store the right value. See left
:param ondelete: Define the behavior of the record when the target
record is deleted. (``CASCADE``, ``RESTRICT``, ``SET NULL``)
``SET NULL`` will be changed into ``RESTRICT`` if required is set.
:param datetime_field: The name of the field that contains the datetime
value to read the target record.
:param target_search: The kind of target search 'subquery' or 'join'
'''
self.__required = required
if ondelete not in ('CASCADE', 'RESTRICT', 'SET NULL'):
raise Exception('Bad arguments')
self.ondelete = ondelete
if datetime_field:
if depends:
depends.append(datetime_field)
else:
depends = [datetime_field]
super(Many2One, self).__init__(string=string, help=help,
required=required, readonly=readonly, domain=domain, states=states,
select=select, on_change=on_change, on_change_with=on_change_with,
depends=depends, context=context, loading=loading)
self.model_name = model_name
self.left = left
self.right = right
self.datetime_field = datetime_field
assert target_search in ['subquery', 'join']
self.target_search = target_search
__init__.__doc__ += Field.__init__.__doc__
def __get_required(self):
return self.__required
def __set_required(self, value):
self.__required = value
if value and self.ondelete == 'SET NULL':
self.ondelete = 'RESTRICT'
required = property(__get_required, __set_required)
def get_target(self):
'Return the target Model'
return Pool().get(self.model_name)
def __set__(self, inst, value):
Target = self.get_target()
if isinstance(value, dict):
value = Target(**value)
elif isinstance(value, int):
value = Target(value)
assert isinstance(value, (Target, type(None)))
super(Many2One, self).__set__(inst, value)
def sql_format(self, value):
if value is None:
return None
assert value is not False
return int(value)
def convert_domain_mptt(self, domain, tables):
cursor = Transaction().connection.cursor()
table, _ = tables[None]
name, operator, ids = domain
red_sql = reduce_ids(table.id, ids)
Target = self.get_target()
left = getattr(Target, self.left).sql_column(table)
right = getattr(Target, self.right).sql_column(table)
cursor.execute(*table.select(left, right, where=red_sql))
where = Or()
for l, r in cursor.fetchall():
if operator.endswith('child_of'):
where.append((left >= l) & (right <= r))
else:
where.append((left <= l) & (right >= r))
if not where:
where = Literal(False)
if operator.startswith('not'):
return ~where
return where
def convert_domain_tree(self, domain, tables):
Target = self.get_target()
table, _ = tables[None]
name, operator, ids = domain
ids = set(ids) # Ensure it is a set for concatenation
def get_child(ids):
if not ids:
return set()
children = Target.search([
(name, 'in', ids),
(name, '!=', None),
], order=[])
child_ids = get_child(set(c.id for c in children))
return ids | child_ids
def get_parent(ids):
if not ids:
return set()
parent_ids = set(getattr(p, name).id
for p in Target.browse(ids) if getattr(p, name))
return ids | get_parent(parent_ids)
if operator.endswith('child_of'):
ids = list(get_child(ids))
else:
ids = list(get_parent(ids))
if not ids:
expression = Literal(False)
else:
expression = table.id.in_(ids)
if operator.startswith('not'):
return ~expression
return expression
def convert_domain(self, domain, tables, Model):
pool = Pool()
Rule = pool.get('ir.rule')
Target = self.get_target()
table, _ = tables[None]
name, operator, value = domain[:3]
column = self.sql_column(table)
if '.' not in name:
if operator.endswith('child_of') or operator.endswith('parent_of'):
if Target != Model:
if operator.endswith('child_of'):
target_operator = 'child_of'
else:
target_operator = 'parent_of'
query = Target.search([
(domain[3], target_operator, value),
], order=[], query=True)
expression = column.in_(query)
if operator.startswith('not'):
return ~expression
return expression
if isinstance(value, str):
targets = Target.search([('rec_name', 'ilike', value)],
order=[])
ids = [t.id for t in targets]
elif not isinstance(value, (list, tuple)):
ids = [value]
else:
ids = value
if not ids:
expression = Literal(False)
if operator.startswith('not'):
return ~expression
return expression
elif self.left and self.right:
return self.convert_domain_mptt(
(name, operator, ids), tables)
else:
return self.convert_domain_tree(
(name, operator, ids), tables)
# Used for Many2Many where clause
if operator.endswith('where'):
query = Target.search(value, order=[], query=True)
expression = column.in_(query)
if operator.startswith('not'):
return ~expression
return expression
if not isinstance(value, str):
return super(Many2One, self).convert_domain(domain, tables,
Model)
else:
target_name = 'rec_name'
else:
_, target_name = name.split('.', 1)
target_domain = [(target_name,) + tuple(domain[1:])]
if 'active' in Target._fields:
target_domain.append(('active', 'in', [True, False]))
if self.target_search == 'subquery':
query = Target.search(target_domain, order=[], query=True)
return column.in_(query)
else:
target_tables = self._get_target_tables(tables)
target_table, _ = target_tables[None]
rule_domain = Rule.domain_get(Target.__name__, mode='read')
if rule_domain:
target_domain = [target_domain, rule_domain]
_, expression = Target.search_domain(
target_domain, tables=target_tables)
return expression
def convert_order(self, name, tables, Model):
fname, _, oexpr = name.partition('.')
if not oexpr and getattr(Model, 'order_%s' % fname, None):
return super(Many2One, self).convert_order(fname, tables, Model)
assert fname == self.name
Target = self.get_target()
if oexpr:
oname, _, _ = oexpr.partition('.')
else:
oname = 'id'
if Target._rec_name in Target._fields:
oname = Target._rec_name
if Target._order_name in Target._fields:
oname = Target._order_name
oexpr = oname
table, _ = tables[None]
if oname == 'id':
return [self.sql_column(table)]
ofield = Target._fields[oname]
target_tables = self._get_target_tables(tables)
return ofield.convert_order(oexpr, target_tables, Target)
def _get_target_tables(self, tables):
Target = self.get_target()
table, _ = tables[None]
target_tables = tables.get(self.name)
context = Transaction().context
if target_tables is None:
if Target._history and context.get('_datetime'):
target = Target.__table_history__()
target_history = Target.__table_history__()
history_condition = Column(target, '__id').in_(
target_history.select(
Max(Column(target_history, '__id')),
where=Coalesce(
target_history.write_date,
target_history.create_date)
<= context['_datetime'],
group_by=target_history.id))
else:
target = Target.__table__()
history_condition = None
condition = target.id == self.sql_column(table)
if history_condition:
condition &= history_condition
target_tables = {
None: (target, condition),
}
tables[self.name] = target_tables
return target_tables
|