Django admin：仅在更改表单上排除字段 [英] Django admin: exclude field on change form only

问题描述

如果有办法检测模型中的信息是否被添加或更改。

If there a way to detect if information in a model is being added or changed.

如果可以使用此信息来排除字段。

If there is can this information be used to exclude fields.

一些伪代码来说明我在说什么。

Some pseudocode to illustrate what I'm talking about.

class SubSectionAdmin(admin.ModelAdmin):
    if something.change_or_add = 'change':
        exclude = ('field',)
    ...

谢谢

推荐答案

class SubSectionAdmin(admin.ModelAdmin):
    # ...
    def change_view(self, request, object_id, extra_context=None):       
        self.exclude = ('field', )
        return super(SubSectionAdmin, self).change_view(request, object_id, extra_context)

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