Closes #14156: Add custom field support for contact assignments

netbox/tenancy/migrations/0012_contactassignment_custom_fields.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.2.6 on 2023-11-06 20:23
+
+from django.db import migrations, models
+import utilities.json
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tenancy', '0011_contactassignment_tags'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='contactassignment',
+            name='custom_field_data',
+            field=models.JSONField(blank=True, default=dict, encoder=utilities.json.CustomFieldJSONEncoder),
+        ),
+    ]