Make alt_text and credits not nullable

program/migrations/0053_auto_20230411_1855.py

+# Generated by Django 3.2.18 on 2023-04-11 16:55
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('program', '0052_show_logo'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='image',
+            name='alt_text',
+            field=models.TextField(blank=True, default=''),
+        ),
+        migrations.AlterField(
+            model_name='image',
+            name='credits',
+            field=models.TextField(blank=True, default=''),
+        ),
+    ]

program/models.py

@@ -140,8 +140,8 @@ class Language(models.Model):
 
 
 class Image(models.Model):
-    alt_text = models.TextField(blank=True, null=True)
-    credits = models.TextField(blank=True, null=True)
+    alt_text = models.TextField(blank=True, default="")
+    credits = models.TextField(blank=True, default="")
     height = models.PositiveIntegerField(blank=True, null=True, editable=False)
     image = VersatileImageField(
         blank=True,