misc: switch external user id source attribute to a charfield (#27692)

src/authentic2/migrations/0023_auto_20181031_0900.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.12 on 2018-10-31 08:00
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('custom_user', '0016_auto_20180925_1107'),
+        ('authentic2', '0022_attribute_scopes'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='userexternalid',
+            name='source',
+            field=models.CharField(max_length=256, verbose_name='source'),
+        ),
+    ]

src/authentic2/models.py

@@ -44,7 +44,7 @@ class DeletedUser(models.Model):
 class UserExternalId(models.Model):
     user = models.ForeignKey(settings.AUTH_USER_MODEL,
             verbose_name=_('user'))
-    source = models.URLField(max_length=256,
+    source = models.CharField(max_length=256,
             verbose_name=_('source'))
     external_id = models.CharField(max_length=256,
             verbose_name=_('external id'))