Run makemigrations

testproj/articles/migrations/0002_article_read_only_nullable.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.1.5 on 2019-03-02 03:51
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('articles', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='article',
+            name='read_only_nullable',
+            field=models.CharField(blank=True, max_length=20, null=True),
+        ),
+    ]