Add model Many2One on ir.model.data

trytond/trytond/ir/model.py

@@ -1264,7 +1264,11 @@ class ModelButtonReset(ModelSQL):
         required=True, ondelete='CASCADE')
 
 
-class ModelData(ModelSQL, ModelView):
+class ModelData(
+        fields.fmany2one(
+            'model_ref', 'model', 'ir.model,model', "Model",
+            required=True, ondelete='CASCADE'),
+        ModelSQL, ModelView):
     "Model data"
     __name__ = 'ir.model.data'
     fs_id = fields.Char('Identifier on File System', required=True,

trytond/trytond/ir/view/model_data_form.xml

@@ -4,8 +4,8 @@ this repository contains the full copyright notices and license terms. -->
 <form>
     <label name="module"/>
     <field name="module"/>
-    <label name="model"/>
-    <field name="model"/>
+    <label name="model_ref"/>
+    <field name="model_ref"/>
     <label name="fs_id"/>
     <field name="fs_id"/>
     <label name="db_id"/>

trytond/trytond/ir/view/model_data_list.xml

@@ -3,7 +3,7 @@
 this repository contains the full copyright notices and license terms. -->
 <tree>
     <field name="module" optional="0"/>
-    <field name="model" expand="1"/>
+    <field name="model_ref" expand="1"/>
     <field name="fs_id" expand="1"/>
     <field name="db_id" optional="1"/>
     <field name="noupdate"/>