Make NewsletterContent non-abstract

website/newsletters/migrations/0006_make_newslettercontent_non_abstract.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.3 on 2016-12-14 19:49
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+import tinymce.models
+
+def migrate_event_to_content(apps, schema_editor):
+    NewsletterContent = apps.get_model("newsletters", "NewsletterContent")
+    NewsletterEvent = apps.get_model("newsletters", "NewsletterEvent")
+
+    events = NewsletterEvent.objects.all()
+    for event in events:
+        content = NewsletterContent(
+            title_en=event.title_en,
+            title_nl=event.title_nl,
+            description_en=event.description_en,
+            description_nl=event.description_nl,
+            newsletter_id=event.newsletter_id
+        )
+        content.save()
+        event.newslettercontent_ptr = content
+        event.save()
+
+
+def migrate_item_to_content(apps, schema_editor):
+    NewsletterContent = apps.get_model("newsletters", "NewsletterContent")
+    NewsletterItem = apps.get_model("newsletters", "NewsletterItem")
+
+    items = NewsletterItem.objects.all()
+    for item in items:
+        content = NewsletterContent(
+            title_en=item.title_en,
+            title_nl=item.title_nl,
+            description_en=item.description_en,
+            description_nl=item.description_nl,
+            newsletter_id=item.newsletter_id
+        )
+        content.save()
+        item.newslettercontent_ptr = content
+        item.save()
+
+
+def migrate_content_to_event(apps, schema_editor):
+    NewsletterContent = apps.get_model("newsletters", "NewsletterContent")
+
+    contents = NewsletterContent.objects.all()
+    for content in contents:
+        item = content.newsletterevent
+        item.title_en = content.title_en
+        item.title_nl = content.title_nl
+        item.description_en = content.description_en
+        item.description_nl = content.description_nl
+        item.save()
+
+
+def migrate_content_to_item(apps, schema_editor):
+    NewsletterContent = apps.get_model("newsletters", "NewsletterContent")
+
+    contents = NewsletterContent.objects.all()
+    for content in contents:
+        item = content.newsletteritem
+        item.title_en = content.title_en
+        item.title_nl = content.title_nl
+        item.description_en = content.description_en
+        item.description_nl = content.description_nl
+        item.save()
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('newsletters', '0005_merge_20161214_2018'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='NewsletterContent',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True,
+                                        serialize=False, verbose_name='ID')),
+                ('description_en',
+                 tinymce.models.HTMLField(verbose_name='Description (EN)')),
+                ('description_nl',
+                 tinymce.models.HTMLField(verbose_name='Description (NL)')),
+                ('title_en',
+                 models.CharField(max_length=150, verbose_name='Title (EN)')),
+                ('title_nl',
+                 models.CharField(max_length=150, verbose_name='Title (NL)')),
+                ('newsletter',
+                 models.ForeignKey(on_delete=django.db.models.deletion.CASCADE,
+                                   to='newsletters.Newsletter')),
+            ],
+        ),
+        migrations.AddField(
+            model_name='newsletterevent',
+            name='newslettercontent_ptr',
+            field=models.ForeignKey(default=1,
+                                    on_delete=django.db.models.deletion.DO_NOTHING,
+                                    related_name='newsletterevent',
+                                    to='newsletters.NewsletterContent'),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='newsletteritem',
+            name='newslettercontent_ptr',
+            field=models.ForeignKey(default=1,
+                                    on_delete=django.db.models.deletion.DO_NOTHING,
+                                    related_name='newsletteritem',
+                                    to='newsletters.NewsletterContent'),
+            preserve_default=False,
+        ),
+        migrations.RunPython(migrate_event_to_content, migrate_content_to_event),
+        migrations.RunPython(migrate_item_to_content, migrate_content_to_item),
+        migrations.RemoveField(
+            model_name='newsletterevent',
+            name='description_en',
+        ),
+        migrations.RemoveField(
+            model_name='newsletterevent',
+            name='description_nl',
+        ),
+        migrations.RemoveField(
+            model_name='newsletterevent',
+            name='id',
+        ),
+        migrations.RemoveField(
+            model_name='newsletterevent',
+            name='newsletter',
+        ),
+        migrations.RemoveField(
+            model_name='newsletterevent',
+            name='title_en',
+        ),
+        migrations.RemoveField(
+            model_name='newsletterevent',
+            name='title_nl',
+        ),
+        migrations.RemoveField(
+            model_name='newsletteritem',
+            name='description_en',
+        ),
+        migrations.RemoveField(
+            model_name='newsletteritem',
+            name='description_nl',
+        ),
+        migrations.RemoveField(
+            model_name='newsletteritem',
+            name='id',
+        ),
+        migrations.RemoveField(
+            model_name='newsletteritem',
+            name='newsletter',
+        ),
+        migrations.RemoveField(
+            model_name='newsletteritem',
+            name='title_en',
+        ),
+        migrations.RemoveField(
+            model_name='newsletteritem',
+            name='title_nl',
+        ),
+        migrations.AlterField(
+            model_name='newsletterevent',
+            name='newslettercontent_ptr',
+            field=models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='newsletters.NewsletterContent'),
+        ),
+        migrations.AlterField(
+            model_name='newsletteritem',
+            name='newslettercontent_ptr',
+            field=models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='newsletters.NewsletterContent'),
+        ),
+        migrations.AlterOrderWithRespectTo(
+            name='newslettercontent',
+            order_with_respect_to='newsletter',
+        ),
+    ]

website/newsletters/models.py

 from django.core.exceptions import ValidationError
 from django.db import models
+from django.db.models import ForeignKey
 from django.urls import reverse
 from django.utils.translation import ugettext_lazy as _
 from tinymce.models import HTMLField
@@ -67,7 +68,8 @@ class NewsletterContent(models.Model, metaclass=ModelTranslateMeta):
     newsletter = models.ForeignKey(Newsletter, on_delete=models.CASCADE)
 
     class Meta:
-        abstract = True
+        #abstract = True
+        order_with_respect_to = 'newsletter'
 
 
 class NewsletterItem(NewsletterContent):