Search code examples
djangodjango-viewsdjango-admin

Django admin: displaying computed property when viewing a single item

I store compressed strings in the database. I would like to see the actual string when in Django Admin. Since the strings are very long, I don't want them to appear in the list view, but only when viewing a single item (row). So, I can define:

@property
def short_my_field(self):
    return pickle.loads(brotli.decompress(self.my_field))[:80]

@property
def original_my_field(self):
    return pickle.loads(brotli.decompress(self.my_field))

I will then put short_my_field into list_display. But how do I cause original_my_field to display when viewing a single item?

Solution

  • You can define a readonly_fields as below,

    class MyModelAdmin(admin.ModelAdmin):
    readonly_fields = ("anything_you_want",)
    fields = ("field_1", "anything_you_want")

    def anything_you_want(self, obj):
        return obj.original_my_field