[FIX] product.template: name_search compatibility with product.product

In the rare places with a m2o field to product.template
(e.g BoMs), it is necessary to be able to search on product
codes, EAN, etc, the way it works on product.product.
This is done by delegating the name_search to product.product
and then returning the corresponding templates.
This has a small penalty of executing name_get() twice,
but is simpler and more robust for future changes.

An alternative would have been to extract the name_search()
method into a mixin and mix it on both product.product and
product.template. However this would be more brittle and
only work as long as the name_search implementation strictly
uses fields that are present in both tables.

OPW 626662

addons/product/product.py

@@ -22,8 +22,10 @@
 import math
 import re
 import time
+from collections import OrderedDict
 from _common import ceiling
 
+
 from openerp import SUPERUSER_ID
 from openerp import tools
 from openerp.osv import osv, fields, expression
@@ -797,9 +799,16 @@ class product_template(osv.osv):
             pass
         return super(product_template, self).name_get(cr, user, ids, context)
 
-
+    def name_search(self, cr, user, name='', args=None, operator='ilike', context=None, limit=100):
-
+        product_product = self.pool['product.product']
-
+        results = product_product.name_search(
+            cr, user, name, args, operator=operator, context=context, limit=limit)
+        product_ids = [p[0] for p in results]
+        template_ids = [p.product_tmpl_id.id
+                            for p in product_product.browse(
+                                cr, user, product_ids, context=context)]
+        uniq_ids = OrderedDict.fromkeys(template_ids).keys()
+        return self.name_get(cr, user, uniq_ids, context=context)
 
 class product_product(osv.osv):
     _name = "product.product"