~sebastien.beau/openobject-addons/on-change-support-extra-addons

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# -*- encoding: utf-8 -*-
#########################################################################
# Copyright (C) 2009  Sharoon Thomas, Open Labs Business solutions      #
# Copyright (C) 2011 Akretion Sébastien BEAU sebastien.beau@akretion.com#
#                                                                       #
#This program is free software: you can redistribute it and/or modify   #
#it under the terms of the GNU 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 General Public License for more details.                           #
#                                                                       #
#You should have received a copy of the GNU General Public License      #
#along with this program.  If not, see <http://www.gnu.org/licenses/>.  #
#########################################################################
from osv import osv,fields
from tools.translate import _
import os

class product_product(osv.osv):
    _inherit = "product.product"

    def copy(self, cr, uid, id, default=None, context=None):
        if not default:
            default = {}
        default.update({
            'default_code': False,
            'images_ids': False,
        })
        return super(product_product, self).copy(cr, uid, id, default, context=context)

    def get_main_image(self, cr, uid, id, context=None):
        if isinstance(id, list):
            id = id[0]
        images_ids = self.read(cr, uid, id, ['image_ids'], context=context)['image_ids']
        if images_ids:
            return images_ids[0]
        return False
    
    def _get_main_image(self, cr, uid, ids, field_name, arg, context=None):
        res = {}
        img_obj = self.pool.get('product.images')
        for id in ids:
            image_id = self.get_main_image(cr, uid, id, context=context)
            if image_id:
                image = img_obj.browse(cr, uid, image_id, context=context)
                res[id] = image.file
            else:
                res[id] = False
        return res

    _columns = {
        'image_ids':fields.one2many(
                'product.images',
                'product_id',
                'Product Images'
        ),
        'default_code' : fields.char('Reference', size=64, require='True'),
        'product_image': fields.function(_get_main_image, type="binary", method=True),
    }    

    def write(self, cr, uid, ids, vals, context=None):
        if isinstance(ids, (int, long)):
            ids = [ids]
        # here we expect that the write on default_code is alwayse on 1 product because there is an unique constraint on the default code
        if vals.get('default_code', False) and ids:
            local_media_repository = self.pool.get('res.company').get_local_media_repository(cr, uid, context=context)
            if local_media_repository:
                old_product = self.read(cr, uid, ids[0], ['default_code', 'image_ids'], context=context)
                res = super(product_product, self).write(cr, uid, ids, vals, context=context)
                if old_product['image_ids']:
                    if old_product['default_code'] != vals['default_code']:
                        old_path = os.path.join(local_media_repository, old_product['default_code'])
                        if os.path.isdir(old_path):
                            os.rename(old_path,  os.path.join(local_media_repository, vals['default_code']))
                return res
        return super(product_product, self).write(cr, uid, ids, vals, context=context)

    #This constraint should be by default in openerp 
    _sql_constraints = [('default_code', 'UNIQUE(default_code)',
                _('Default code should be uniq'))]
    
product_product()