REST API: Add support for idempotency keys

src/pretix/api/migrations/0004_auto_20190405_1048.py

@@ -0,0 +1,44 @@
+# Generated by Django 2.1.5 on 2019-04-05 10:48
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('pretixbase', '0116_auto_20190402_0722'),
+        ('pretixapi', '0003_webhook_webhookcall_webhookeventlistener'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ApiCall',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('idempotency_key', models.CharField(db_index=True, max_length=190)),
+                ('auth_hash', models.CharField(db_index=True, max_length=190)),
+                ('created', models.DateTimeField(auto_now_add=True)),
+                ('locked', models.DateTimeField(null=True)),
+                ('request_method', models.CharField(max_length=20)),
+                ('request_path', models.CharField(max_length=255)),
+                ('response_code', models.PositiveIntegerField()),
+                ('response_headers', models.TextField()),
+                ('response_body', models.BinaryField()),
+            ],
+        ),
+        migrations.AlterModelOptions(
+            name='webhookcall',
+            options={'ordering': ('-datetime',)},
+        ),
+        migrations.AlterModelOptions(
+            name='webhookeventlistener',
+            options={'ordering': ('action_type',)},
+        ),
+        migrations.AlterUniqueTogether(
+            name='apicall',
+            unique_together={('idempotency_key', 'auth_hash')},
+        ),
+    ]