migaration

src/document/migrations/0004_auto_20190123_1812.py

+# Generated by Django 2.0.1 on 2019-01-23 17:12
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('document', '0003_auto_20190121_1335'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='document',
+            name='solution',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='files', to='homework.Solution'),
+        ),
+    ]