66 lines
2.6 KiB
Python
66 lines
2.6 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 Column
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from sql.conditionals import Case
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from ...config import CONFIG
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from .field import Field, SQLType
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class Selection(Field):
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'''
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Define a selection field (``str``).
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'''
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_type = 'selection'
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def __init__(self, selection, string='', sort=True,
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selection_change_with=None, translate=True, help='',
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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='eager'):
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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 the value
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to store and the second is the value to display.
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:param sort: A boolean to sort or not the selections.
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'''
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super(Selection, 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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if hasattr(selection, 'copy'):
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self.selection = selection.copy()
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else:
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self.selection = selection
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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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self.sort = sort
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self.translate_selection = translate
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__init__.__doc__ += Field.__init__.__doc__
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def sql_type(self):
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db_type = CONFIG['db_type']
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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_order(self, name, tables, Model):
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if getattr(Model, 'order_%s' % name, None):
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return super(Selection, self).convert_order(name, tables, Model)
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table, _ = tables[None]
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selections = Model.fields_get([name])[name]['selection']
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if not isinstance(selections, (tuple, list)):
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selections = getattr(Model, selections)()
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column = Column(table, name)
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whens = []
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for key, value in selections:
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whens.append((column == key, value))
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return [Case(*whens, else_=column)]
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