在Django管理员中编辑/显示主键
看来，Django会隐藏在Django管理界面中显示/编辑的标记主键的字段。
It appears Django hides fields that are flagged Primary Key from being displayed/edited in the Django admin interface.
我想输入数据，其中我可能也可能不想指定主键。我如何在管理界面中显示主键，如何指定它可选？
Let's say I'd like to input data in which I may or may not want to specify a primary key. How would I go about displaying primary keys in the admin interface, and how could I make specifying it optional?
我也想在Django管理员中只显示id（主键），但不一定要编辑它。我刚把它添加到 readonly_fields 列表中，它显示正常。 IE：
I also wanted to simply show the 'id' (primary key) within the Django admin, but not necessarily edit it. I just added it to the readonly_fields list, and it showed up fine. IE:
class StudentEnrollmentInline(admin.TabularInline):
model = Enrollment
readonly_fields=('id',)
而如果我尝试将其添加到fields列表中，Django对我说这个领域不存在...
whereas if I tried to add it to the 'fields' list, Django got upset with me, saying that field didn't exist...