server-tools/base_field_serialized/fields.py

# -*- coding: utf-8 -*-
##############################################################################
#
#    OpenERP, Open Source Management Solution
#    Copyright (C) 2004-2009 Tiny SPRL (<http://tiny.be>).
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as
#    published by the Free Software Foundation, either version 3 of the
#    License, or (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################

import simplejson
import openerp
from openerp.models import FIELDS_TO_PGTYPES
from openerp.osv.fields import _column

# ---------------------------------------------------------
# Serialized fields
# ---------------------------------------------------------


class serialized(_column):
    """ A field able to store an arbitrary python data structure.

        Note: only plain components allowed.
    """

    def _symbol_set_struct(val):
        return simplejson.dumps(val)

    def _symbol_get_struct(self, val):
        return simplejson.loads(val or '{}')

    _prefetch = False
    _type = 'serialized'

    _symbol_c = '%s'
    _symbol_f = _symbol_set_struct
    _symbol_set = (_symbol_c, _symbol_f)
    _symbol_get = _symbol_get_struct

openerp.osv.fields.serialized = serialized
FIELDS_TO_PGTYPES[openerp.osv.fields.serialized] = 'text'