core: add invite model for sign-up

passbook/core/migrations/0003_invite.py

@@ -0,0 +1,30 @@
+# Generated by Django 2.1.4 on 2018-12-10 12:13
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import uuid
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('passbook_core', '0002_auto_20181210_1011'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Invite',
+            fields=[
+                ('uuid', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
+                ('expires', models.DateTimeField(blank=True, default=None, null=True)),
+                ('fixed_username', models.TextField(blank=True, default=None)),
+                ('fixed_email', models.TextField(blank=True, default=None)),
+                ('created_by', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name': 'Invite',
+                'verbose_name_plural': 'Invites',
+            },
+        ),
+    ]

passbook/core/models.py

@@ -249,3 +249,19 @@ class DebugRule(Rule):
 
         verbose_name = _('Debug Rule')
         verbose_name_plural = _('Debug Rules')
+
+class Invite(UUIDModel):
+    """Single-use invite link"""
+
+    created_by = models.ForeignKey('User', on_delete=models.CASCADE)
+    expires = models.DateTimeField(default=None, blank=True, null=True)
+    fixed_username = models.TextField(blank=True, default=None)
+    fixed_email = models.TextField(blank=True, default=None)
+
+    def __str__(self):
+        return "Invite %s created by %s" % (self.uuid, self.created_by)
+
+    class Meta:
+
+        verbose_name = _('Invite')
+        verbose_name_plural = _('Invites')