python - Django admin - make all fields readonly

Question

I'm trying to make all fields readonly without listing them explicitly.

Something like:

class CustomAdmin(admin.ModelAdmin):
    def get_readonly_fields(self, request, obj=None):
        if request.user.is_superuser:
            return self.readonly_fields

        return self.fields

The problem is CustomAdmin.fields is not set at this point.

Any ideas?

Answer 1

Since django 2.1, you can prevent editing, while allowing viewing, by returning False from the ModelAdmin's has_change_permission method, like this:

class CustomAdmin(admin.ModelAdmin):
    def has_change_permission(self, request, obj=None):
        return False

(This will not work before django 2.1, as it will also deny permission to any user trying only to view.)