Django:在更新调用中为文本字段使用F表达式

In a django view, I need to append string data to the end of an existing text column in my database. So, for example, say I have a table named "ATable", and it has a field named "aField". I'd like to be able to append a string to the end of "aField" in a race-condition-free way. Initially, I had this:In a django view, I need to append string data