Handle invalid view names with more than one period

I've updated the code as recommended and added an error message should there there be too many periods. Thanks for the suggestion!

python/plugins/db_manager/db_plugins/postgis/connector.py

@@ -1014,12 +1014,15 @@ def moveTable(self, table, new_table, new_schema=None):
         self._commit()
 
     def createView(self, view, query):
-        user_input = view
+        view_name_parts = view.split('.')
 
-        if '.' in user_input: # To allow view creation into specified schema
-            schema, view_name = user_input.split('.')
+        if len(view_name_parts) > 2:
+            # Raise an error when more than one period is used.
+            raise ValueError("Invalid view name: Please use the format 'schema.viewname', or enter only the viewname for the public schema.")
+        elif len(view_name_parts) == 2: # To allow view creation into specified schema
+            schema, view_name = view_name_parts
             sql = "CREATE VIEW %s AS %s" % (self.quoteId([schema, view_name]), query)
-        else: # No schema specified; uses public
+        else: # No specific schema specified
             sql = "CREATE VIEW %s AS %s" % (self.quoteId(view), query)
         self._execute_and_commit(sql)