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[Sébastien BEAU - http://www.akretion.com <sebastien.beau@xxxxxxxxxxxxxxx>]

Moreover only the read function have a bug. The write and create
function work perfectly ;).

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Server ORM bug V5. Error in read function with inherited field. Maybe V6 is also impacted 
https://bugs.launchpad.net/bugs/673696
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Status in OpenObject Server: Incomplete

Bug description:
We are working on product_variant_multi and so using inherited fields.

If you add the field "name" to the object product.product, the "read" function on the object product.product will give you the result of the field "name" of the object product.template.

If you look at orm.py, line 2333 :
You will see that the ORM doesn't make any check on the existing fields in product.product before reading them in product.template.

I just added a check

-            cols = intersect(self._inherit_fields.keys(), fields_to_read)
+            cols = [x for x in intersect(self._inherit_fields.keys(), fields_to_read) if x not in self._columns.keys()]

For information : "cols" is the variable which contains the fields that we have to read in the inherited object.

With this patch fields are only read in the inherited object if they are not found in the actual object.