added edi_message field

edocument.py

@@ -41,7 +41,7 @@ class EdocumentTemplate(ModelView, ModelSQL):
 class EdocumentMessage(ModelView, ModelSQL):
     """EDIFACT message"""
     __name__ = 'edocument.message'
-    _rec_name = 'code'
+    rec_name = fields.Function(fields.Char('Record Name'), 'get_rec_name')
 
     code = fields.Char('Code')
     message = fields.Text('Message')
@@ -49,6 +49,9 @@ class EdocumentMessage(ModelView, ModelSQL):
     origin = fields.Reference('Origin', selection='get_origin',
         required=True)
 
+    def get_rec_name(self, name):
+        return 'EW' + '{0:0>6}'.format(self.code)
+
     @classmethod
     def get_origin(cls):
         IrModel = Pool().get('ir.model')
@@ -82,6 +85,9 @@ class EdocumentMixin():
         fields.Boolean('Processed'), 'get_edocument_processed',
         searcher='search_edocument_processed')
 
+    edi_message = fields.Function(
+        fields.Char('EDI Code'), 'get_edi_message')
+
     def get_edocument_processed(self, name=None):
         return len(self.messages) > 0
 
@@ -90,9 +96,11 @@ class EdocumentMixin():
         exist = {
             True: [('messages', '=', None)],
             False: [('messages', '!=', None)]}
-
         return exist[bool(clause[1] == '=') ^ bool(clause[2])]
 
+    def get_edi_message(self, name=None):
+        return self.messages[-1].rec_name if self.messages else ''
+
 
 class EdocumentImportMixin(EdocumentMixin):