[FIX] bi_sql_editor: Add required attribute name on filters

bi_sql_editor/models/bi_sql_view_field.py

@@ -228,6 +228,9 @@ class BiSQLViewField(models.Model):
         res = ''
         if self.field_description and self.is_group_by:
             res = \
-                """<filter string="%s" context="{'group_by':'%s'}"/>""" % (
-                    self.field_description, self.name)
+                """<filter name="%s" string="%s"
+                        context="{'group_by':'%s'}"/>""" % (
+                    self.field_description.lower().replace(' ', '_'),
+                    self.field_description, self.name
+                )
         return res