X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/967eed676fc83d15b26149047f353ac61faa8217..af339a5c1a69ec22a6f1d5940cde313953948368:/src/isbn/models.py

diff --git a/src/isbn/models.py b/src/isbn/models.py
index ca8dbee15..b5e5de3a2 100644
--- a/src/isbn/models.py
+++ b/src/isbn/models.py
@@ -1,10 +1,8 @@
-# -*- coding: utf-8 -*-
 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
 from django.db import models
 from django.db.models import F
-from jsonfield import JSONField
 
 
 class ISBNPool(models.Model):
@@ -53,14 +51,14 @@ class ISBNPool(models.Model):
 
 
 class ONIXRecord(models.Model):
-    isbn_pool = models.ForeignKey(ISBNPool)
+    isbn_pool = models.ForeignKey(ISBNPool, models.PROTECT)
     datestamp = models.DateField(auto_now=True)
     suffix = models.IntegerField()
     product_form = models.CharField(max_length=4)
     product_form_detail = models.CharField(max_length=8, blank=True)
     title = models.CharField(max_length=256)
     part_number = models.CharField(max_length=64, blank=True)
-    contributors = JSONField()  # roles, names, optional: ISNI, date of birth/death
+    contributors = models.TextField()  # roles, names, optional: ISNI, date of birth/death
     edition_type = models.CharField(max_length=4)
     edition_number = models.IntegerField(default=1)
     language = models.CharField(max_length=4)