Remove foreign keys between nested plugins

ungleich_page/cms_plugins.py

@@ -67,6 +67,9 @@ class GlasfaserServicesItemPlugin(CMSPluginBase):
     parent_classes = ['GlasfaserServicesPlugin']
 
     def render(self, context, instance, placeholder):
+        context = super(GlasfaserServicesItemPlugin, self).render(
+            context, instance, placeholder
+        )
         context['instance'] = instance
         return context
 
@@ -95,5 +98,8 @@ class GlasfaserAboutItemPlugin(CMSPluginBase):
     parent_classes = ['GlasfaserAboutPlugin']
 
     def render(self, context, instance, placeholder):
+        context = super(GlasfaserAboutItemPlugin, self).render(
+            context, instance, placeholder
+        )
         context['instance'] = instance
         return context

ungleich_page/migrations/0001_initial.py

@@ -1,11 +1,11 @@
 # -*- coding: utf-8 -*-
-# Generated by Django 1.9.4 on 2017-10-18 14:43
+# Generated by Django 1.9.4 on 2017-10-18 18:23
 from __future__ import unicode_literals
 
+from django.db import migrations, models
 import django.db.models.deletion
 import djangocms_text_ckeditor.fields
 import filer.fields.image
-from django.db import migrations, models
 
 
 class Migration(migrations.Migration):
@@ -13,8 +13,8 @@ class Migration(migrations.Migration):
     initial = True
 
     dependencies = [
-        ('cms', '0014_auto_20160404_1908'),
         ('filer', '0004_auto_20160328_1434'),
+        ('cms', '0014_auto_20160404_1908'),
     ]
 
     operations = [
@@ -36,6 +36,7 @@ class Migration(migrations.Migration):
                 ('cmsplugin_ptr', models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='cms.CMSPlugin')),
                 ('title', models.CharField(max_length=200)),
                 ('description', djangocms_text_ckeditor.fields.HTMLField()),
+                ('image', filer.fields.image.FilerImageField(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='service_item_image', to='filer.Image')),
             ],
             options={
                 'abstract': False,
@@ -91,7 +92,6 @@ class Migration(migrations.Migration):
             fields=[
                 ('ungelichpicture_ptr', models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='ungleich_page.UngelichPicture')),
                 ('inverted', models.BooleanField(default=False)),
-                ('glasfaser_about', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='ungleich_page.About')),
             ],
             options={
                 'abstract': False,
@@ -103,14 +103,4 @@ class Migration(migrations.Migration):
             name='image',
             field=filer.fields.image.FilerImageField(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='image', to='filer.Image'),
         ),
-        migrations.AddField(
-            model_name='serviceitem',
-            name='glasfaser_service',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='ungleich_page.Service'),
-        ),
-        migrations.AddField(
-            model_name='serviceitem',
-            name='image',
-            field=filer.fields.image.FilerImageField(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='service_item_image', to='filer.Image'),
-        ),
     ]

ungleich_page/models.py

@@ -40,14 +40,10 @@ class ServiceItem(CMSPlugin):
     )
     title = models.CharField(max_length=200)
     description = HTMLField()
-    glasfaser_service = models.ForeignKey(Service)
 
     def __str__(self):
         return self.title
 
-    def copy_relations(self, oldinstance):
-        self.glasfaser_service = oldinstance.glasfaser_service
-
 
 class About(Service):
     pass
@@ -55,13 +51,9 @@ class About(Service):
 
 class AboutItem(UngelichPicture):
     inverted = models.BooleanField(default=False)
-    glasfaser_about = models.ForeignKey(About)
 
     def __str__(self):
         alignment = "Right" if self.inverted else "Left"
         return "{alignment} - {title}".format(
             alignment=alignment, title=self.title
         )
-
-    def copy_relations(self, oldinstance):
-        self.glasfaser_about = oldinstance.glasfaser_about