migrated space to ingredient, step and nutritional value

cookbook/migrations/0135_auto_20210615_2210.py

@@ -0,0 +1,63 @@
+# Generated by Django 3.2.4 on 2021-06-15 20:10
+
+from django.db import migrations
+from django.db.models import Subquery, OuterRef
+from django_scopes import scopes_disabled
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+def migrate_spaces(apps, schema_editor):
+    with scopes_disabled():
+        Recipe = apps.get_model('cookbook', 'Recipe')
+        Step = apps.get_model('cookbook', 'Step')
+        Ingredient = apps.get_model('cookbook', 'Ingredient')
+        NutritionInformation = apps.get_model('cookbook', 'NutritionInformation')
+
+        Step.objects.filter(recipe__isnull=True).delete()
+        Ingredient.objects.filter(step__recipe__isnull=True).delete()
+        NutritionInformation.objects.filter(recipe__isnull=True).delete()
+
+        Step.objects.update(space=Subquery(Step.objects.filter(pk=OuterRef('pk')).values('recipe__space')[:1]))
+        Ingredient.objects.update(space=Subquery(Ingredient.objects.filter(pk=OuterRef('pk')).values('step__recipe__space')[:1]))
+        NutritionInformation.objects.update(space=Subquery(NutritionInformation.objects.filter(pk=OuterRef('pk')).values('recipe__space')[:1]))
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('cookbook', '0134_space_allow_sharing'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='ingredient',
+            name='space',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='cookbook.space', null=True),
+        ),
+        migrations.AddField(
+            model_name='nutritioninformation',
+            name='space',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='cookbook.space', null=True),
+        ),
+        migrations.AddField(
+            model_name='step',
+            name='space',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='cookbook.space', null=True),
+        ),
+        migrations.RunPython(migrate_spaces),
+        migrations.AlterField(
+            model_name='ingredient',
+            name='space',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='cookbook.space'),
+        ),
+        migrations.AlterField(
+            model_name='nutritioninformation',
+            name='space',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='cookbook.space'),
+        ),
+        migrations.AlterField(
+            model_name='step',
+            name='space',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='cookbook.space'),
+        ),
+    ]