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

Careful, self.model._meta.fields are not necessarily the same fields that CustomAdmin has!

“All fields of the Admin” would look more like this:

from django.contrib import admin
from django.contrib.admin.utils import flatten_fieldsets

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

        if self.declared_fieldsets:
            return flatten_fieldsets(self.declared_fieldsets)
        else:
            return list(set(
                [field.name for field in self.opts.local_fields] +
                [field.name for field in self.opts.local_many_to_many]
            ))