python - Django：内联中的编程字段

Question

从这个问题扩展：Django ModelAdmin 中的“list_display”可以显示 ForeignKey 字段的属性吗？，有没有可能做这样的事情：

class MyModelInline(admin.StackedInline):
    model  = MyModel
    extra  = 1
    fields = ('my_field',)

    def my_field(self, obj):
        return obj.one_to_one_link.my_field

如果这样的事情是可能的，它将解决我当前的大部分 Django 问题，但上面的代码不起作用：Django（正确地）抱怨my_field表单中不存在。

Answer 1

You can do that, but you must also add my_field to your MyModelInline class's readonly_fields attribute.

fields = ('my_field',)
readonly_fields = ('my_field',)

From the docs:

The fields option, unlike list_display, may only contain names of fields on the model or the form specified by form. It may contain callables only if they are listed in readonly_fields.

If you need the field to be editable, you should be able to do that with a custom form but it takes more work to process it.