Initial gui support

dcc/roster/migrations/0003_alter_rollingstockimage_rolling_stock.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.0.3 on 2022-04-08 22:45
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('roster', '0002_alter_rollingstockimage_unique_together_and_more'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='rollingstockimage',
+            name='rolling_stock',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='thumbnail', to='roster.rollingstock'),
+        ),
+    ]

dcc/roster/models.py

@@ -121,7 +121,10 @@ class RollingStockDocument(models.Model):
 
 
 class RollingStockImage(models.Model):
-    rolling_stock = models.ForeignKey(RollingStock, on_delete=models.CASCADE)
+    rolling_stock = models.ForeignKey(
+        RollingStock,
+        on_delete=models.CASCADE,
+        related_name="thumbnail")
     image = models.ImageField(upload_to="images/", null=True, blank=True)
     is_thumbnail = models.BooleanField()