Fixed #12481: Updated admin validation code to not reject non-editable fields...

                if type(fields) != tuple:

                    fields = (fields,)

                for field in fields:

                    if field in cls.readonly_fields:

                        # Stuff can be put in fields that isn't actually a

                        # model field if it's in readonly_fields,

                        # readonly_fields will handle the validation of such

                        # things.

                        continue

                    check_formfield(cls, model, opts, "fieldsets[%d][1]['fields']" % idx, field)

                    try:

                        f = opts.get_field(field)

class Song(models.Model):

    title = models.CharField(max_length=150)

    album = models.ForeignKey(Album)

    original_release = models.DateField(editable=False)

    class Meta:

        ordering = ('title',)

from django.contrib import admin

from django.contrib.admin.validation import validate

from django.test import TestCase

from models import Song

class ValidationTestCase(TestCase):

    def test_readonly_and_editable(self):

        class SongAdmin(admin.ModelAdmin):

            readonly_fields = ["original_release"]

            fieldsets = [

                (None, {

                    "fields": ["title", "original_release"],

                }),

            ]

        validate(SongAdmin, Song)