Add unique name

Rollback django version to 1.11 since django migration testcase does not yet work with django 2
See issue: plumdog/django_migration_testcase#38

requirements.txt

@@ -1,4 +1,5 @@
-Django==2.0.1
+# Django==2.0.1
+Django==1.11
 factory-boy==2.8.1
 Faker==0.8.8
 

testing_migrations/migrations/0002_awesome_model_unique_name.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.0.1 on 2018-01-12 01:45
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('testing_migrations', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='awesomemodel',
+            name='name',
+            field=models.CharField(max_length=100, unique=True),
+        ),
+    ]

testing_migrations/models.py

@@ -2,4 +2,4 @@
 
 
 class AwesomeModel(models.Model):
-    name = models.CharField(max_length=100)
+    name = models.CharField(max_length=100, unique=True)

testing_migrations/test_migration_the_awesome_way.py

@@ -0,0 +1,30 @@
+import factory
+from django.db import IntegrityError
+from django_migration_testcase import MigrationTest
+from django_migration_testcase.base import idempotent_transaction
+
+
+class Test0002AwesomeModelUniqueName(MigrationTest):
+    app_name = 'testing_migrations'
+    before = '0001_initial'
+    after = '0002_awesome_model_unique_name'
+
+    def setUp(self):
+        super().setUp()
+
+        class AwesomeModelFactory(factory.DjangoModelFactory):
+            name = factory.Faker('pystr')
+
+            class Meta:
+                model = self.get_model_before('testing_migrations.AwesomeModel')
+
+        self.awesome_model_factory = AwesomeModelFactory
+
+    @idempotent_transaction
+    def test_migration(self):
+        self.awesome_model_factory(name="foo")
+        self.awesome_model_factory(name="foo")
+        with self.assertRaisesMessage(IntegrityError, "UNIQUE constraint failed: testing_migrations_awesomemodel.name"):
+            self.run_migration()
+
+

testing_migrations/tests.py

@@ -1,3 +1,4 @@
+from django.db import IntegrityError
 from django.test import TestCase
 
 from . import factories
@@ -9,3 +10,9 @@ class TestAwesomeModelFactory(TestCase):
     def test_create(self):
         instance = self.factory(name='foo')
         self.assertEqual('foo', instance.name)
+
+    def test_unique(self):
+        self.factory(name='foo')
+
+        with self.assertRaisesMessage(IntegrityError, 'UNIQUE constraint failed: testing_migrations_awesomemodel.name'):
+            self.factory(name='foo')