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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.
import warnings
from itertools import chain
from sql.conditionals import Case
from trytond.pool import Pool
from trytond.rpc import RPC
from trytond.tools import cached_property, is_instance_method
from trytond.tools.string_ import LazyString
from trytond.transaction import Transaction
from .field import Field, order_method
class SelectionMixin(Field):
translate_selection = True
sort = True
@cached_property
def edition_depends(self):
return super().edition_depends | set(self.selection_change_with)
def translated(self, name=None):
"Return a descriptor for the translated value of the field"
if name is None:
name = self.name
if name is None:
raise ValueError('Missing name argument')
return TranslatedSelection(name)
def definition(self, model, language):
pool = Pool()
Translation = pool.get('ir.translation')
definition = super().definition(model, language)
name = '%s,%s' % (model.__name__, self.name)
if not isinstance(self.selection, str) and self.translate_selection:
selection = []
for key, source in self.selection:
if not isinstance(source, LazyString):
source = Translation.get_source(
name, 'selection', language, source) or source
selection.append((key, str(source)))
elif hasattr(self.selection, 'copy'):
selection = self.selection.copy()
else:
selection = self.selection
if self.help_selection:
help_selection = {}
for key, source in self.help_selection.items():
if not isinstance(source, LazyString):
source = Translation.get_source(
name, 'selection', language, source) or source
help_selection[key] = str(source)
else:
help_selection = None
definition['selection'] = selection
definition['selection_change_with'] = list(self.selection_change_with)
definition['sort'] = self.sort
definition['help_selection'] = help_selection
return definition
def definition_translations(self, model, language):
name = '%s,%s' % (model.__name__, self.name)
selection = []
sources = []
if not isinstance(self.selection, str) and self.translate_selection:
sources.append(self.selection)
if self.help_selection:
sources.append(self.help_selection.items())
for key, source in chain(*sources):
if not isinstance(source, LazyString):
selection.append(
(name, 'selection', language, source))
return super().definition_translations(model, language) + selection
@classmethod
def get_selection(cls, model, name, inst):
selection = model.fields_get([name])[name]['selection']
if isinstance(selection, str):
sel_func = getattr(model, selection)
if not is_instance_method(model, selection):
selection = sel_func()
else:
selection = sel_func(inst)
return dict(selection)
@classmethod
def get_selection_string(cls, selection, value):
# None and '' are equivalent
if value is None or value == '':
if value not in selection:
switch_value = {None: '', '': None}[value]
if switch_value in selection:
value = switch_value
return selection.get(value, value)
class Selection(SelectionMixin, Field):
'''
Define a selection field (``str``).
'''
_type = 'selection'
_sql_type = 'VARCHAR'
_py_type = str
def __init__(self, selection, string='', sort=True,
selection_change_with=None, translate=True, help='',
help_selection=None, required=False, readonly=False, domain=None,
states=None, on_change=None, on_change_with=None,
depends=None, context=None, loading='eager'):
'''
:param selection: A list or a function name that returns a list.
The list must be a list of tuples. First member is the value
to store and the second is the value to display.
:param sort: A boolean to sort or not the selections.
'''
super(Selection, 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)
if hasattr(selection, 'copy'):
self.selection = selection.copy()
else:
self.selection = selection
self.selection_change_with = set()
if selection_change_with:
warnings.warn('selection_change_with argument is deprecated, '
'use the depends decorator',
DeprecationWarning, stacklevel=2)
self.selection_change_with.update(selection_change_with)
self.sort = sort
self.translate_selection = translate
self.help_selection = help_selection
__init__.__doc__ += Field.__init__.__doc__
def set_rpc(self, model):
super(Selection, self).set_rpc(model)
if not isinstance(self.selection, (list, tuple)):
assert hasattr(model, self.selection), \
'Missing %s on model %s' % (self.selection, model.__name__)
instantiate = 0 if self.selection_change_with else None
cache = dict(days=1) if instantiate is None else None
model.__rpc__.setdefault(
self.selection, RPC(instantiate=instantiate, cache=cache))
@order_method
def convert_order(self, name, tables, Model):
table, _ = tables[None]
selections = Model.fields_get([name])[name]['selection']
if not isinstance(selections, (tuple, list)):
if not is_instance_method(Model, selections):
selections = getattr(Model, selections)()
else:
selections = []
column = self.sql_column(table)
if not self.sort:
else_ = len(selections) + 1
selections = ((k, i) for i, (k, v) in enumerate(selections))
else:
else_ = column
whens = []
for key, value in selections:
whens.append((column == key, value))
if whens:
return [Case(*whens, else_=else_)]
else:
return [column]
class TranslatedSelection(object):
'A descriptor for translated value of Selection field'
def __init__(self, name):
self.name = name
def __get__(self, inst, cls):
from ..model import Model
if inst is None:
return self
field = cls._fields[self.name]
with Transaction().set_context(getattr(inst, '_context', {})):
selection = field.get_selection(cls, self.name, inst)
value = getattr(inst, self.name)
# Use Model __name__ for Reference field
if isinstance(value, Model):
value = value.__name__
if isinstance(value, (list, tuple)):
values = []
for item in value:
values.append(field.get_selection_string(selection, item))
return values
else:
return field.get_selection_string(selection, value)
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