added migration

apps/gallery/migrations/0003_auto_20191001_0647.py

@@ -1,20 +0,0 @@
-# Generated by Django 2.2.4 on 2019-10-01 06:47
-
-from django.db import migrations
-import sorl.thumbnail.fields
-import utils.methods
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('gallery', '0002_auto_20190930_0714'),
-    ]
-
-    operations = [
-        migrations.AlterField(
-            model_name='image',
-            name='image',
-            field=sorl.thumbnail.fields.ImageField(upload_to=utils.methods.image_path, verbose_name='image file'),
-        ),
-    ]

apps/gallery/migrations/0003_auto_20191002_1456.py

@@ -0,0 +1,26 @@
+# Generated by Django 2.2.4 on 2019-10-02 14:56
+
+from django.db import migrations, models
+import django.db.models.deletion
+import sorl.thumbnail.fields
+import utils.methods
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('gallery', '0002_auto_20190930_0714'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='image',
+            name='image',
+            field=sorl.thumbnail.fields.ImageField(upload_to=utils.methods.image_path, verbose_name='image file'),
+        ),
+        migrations.AlterField(
+            model_name='image',
+            name='parent',
+            field=models.ForeignKey(blank=True, default=None, null=True, on_delete=django.db.models.deletion.SET_DEFAULT, related_name='children', to='gallery.Image', verbose_name='parent image'),
+        ),
+    ]

apps/gallery/models.py

@@ -30,7 +30,7 @@ class Image(ProjectBaseMixin, SORLImageMixin, PlatformMixin):
                            verbose_name=_('image file'))
     parent = models.ForeignKey('self',
                                blank=True, null=True, default=None,
-                               related_name='parent_image',
+                               related_name='children',
                                on_delete=models.SET_DEFAULT,
                                verbose_name=_('parent image'))
     orientation = models.PositiveSmallIntegerField(choices=ORIENTATIONS,
@@ -55,7 +55,3 @@ class Image(ProjectBaseMixin, SORLImageMixin, PlatformMixin):
             tasks.delete_image_from_remote_storage.delay(self.id, delete_original)
         else:
             tasks.delete_image_from_remote_storage(self.id, delete_original)
-
-    @property
-    def children(self):
-        return self.parent_image.filter(parent=self)