Change how we handle chunk ordering (and relation).

django_etesync/migrations/0036_auto_20200415_1420.py

@@ -0,0 +1,37 @@
+# Generated by Django 3.0.3 on 2020-04-15 14:20
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0035_auto_20200415_1259'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='collectionitemchunk',
+            options={},
+        ),
+        migrations.AlterUniqueTogether(
+            name='collectionitemchunk',
+            unique_together=set(),
+        ),
+        migrations.CreateModel(
+            name='RevisionChunkRelation',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('chunk', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='revisions_relation', to='django_etesync.CollectionItemChunk')),
+                ('revision', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='chunks_relation', to='django_etesync.CollectionItemRevision')),
+            ],
+            options={
+                'ordering': ('id',),
+            },
+        ),
+        migrations.RemoveField(
+            model_name='collectionitemchunk',
+            name='order',
+        ),
+    ]

django_etesync/migrations/0037_auto_20200415_1421.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.0.3 on 2020-04-15 14:21
+
+from django.db import migrations
+
+
+def change_chunk_relation(apps, schema_editor):
+    CollectionItemRevision = apps.get_model('django_etesync', 'CollectionItemRevision')
+    RevisionChunkRelation = apps.get_model('django_etesync', 'RevisionChunkRelation')
+
+    for revision in CollectionItemRevision.objects.all():
+        for chunk in revision.chunks.all():
+            RevisionChunkRelation.objects.create(chunk=chunk, revision=revision)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0036_auto_20200415_1420'),
+    ]
+
+    operations = [
+        migrations.RunPython(change_chunk_relation),
+    ]

django_etesync/migrations/0038_remove_collectionitemrevision_chunks.py

@@ -0,0 +1,17 @@
+# Generated by Django 3.0.3 on 2020-04-15 14:34
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0037_auto_20200415_1421'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='collectionitemrevision',
+            name='chunks',
+        ),
+    ]