Add plan follower model and configuration

froide_govplan/migrations/0004_auto_20220311_2330.py

@@ -0,0 +1,49 @@
+# Generated by Django 3.2.12 on 2022-03-11 22:30
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('froide_govplan', '0003_auto_20220228_1051'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='governmentplanscmsplugin',
+            name='template',
+            field=models.CharField(blank=True, choices=[('froide_govplan/plugins/default.html', 'Normal'), ('froide_govplan/plugins/progress.html', 'Progress'), ('froide_govplan/plugins/card_cols.html', 'Card columns')], help_text='template used to display the plugin', max_length=250, verbose_name='template'),
+        ),
+        migrations.CreateModel(
+            name='GovernmentPlanFollower',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('email', models.CharField(blank=True, max_length=255)),
+                ('confirmed', models.BooleanField(default=False)),
+                ('timestamp', models.DateTimeField(default=django.utils.timezone.now, verbose_name='Timestamp of Following')),
+                ('context', models.JSONField(blank=True, null=True)),
+                ('content_object', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='followers', to='froide_govplan.governmentplan', verbose_name='Government plan')),
+                ('user', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL, verbose_name='User')),
+            ],
+            options={
+                'verbose_name': 'Government plan follower',
+                'verbose_name_plural': 'Government plan followers',
+                'ordering': ('-timestamp',),
+                'get_latest_by': 'timestamp',
+                'abstract': False,
+            },
+        ),
+        migrations.AddConstraint(
+            model_name='governmentplanfollower',
+            constraint=models.UniqueConstraint(condition=models.Q(('user__isnull', False)), fields=('content_object', 'user'), name='unique_user_follower_froide_govplan_governmentplanfollower'),
+        ),
+        migrations.AddConstraint(
+            model_name='governmentplanfollower',
+            constraint=models.UniqueConstraint(condition=models.Q(('user__isnull', True)), fields=('content_object', 'email'), name='unique_email_follower_froide_govplan_governmentplanfollower'),
+        ),
+    ]