[IMP] do not call search_read if no fields are set

web_dashboard_tile/models/tile_tile.py

@@ -157,7 +157,8 @@ class TileTile(models.Model):
             return
         fields = [f.name for f in [
             self.primary_field_id, self.secondary_field_id] if f]
-        read_vals = model.search_read(eval(domain, eval_context), fields)
+        read_vals = fields and\
+            model.search_read(eval(domain, eval_context), fields) or []
         for f in ['primary_', 'secondary_']:
             f_function = f+'function'
             f_field_id = f+'field_id'