Added 'instances:clone_instances' permission

Replaces 'can_clone_instances' user attribute

instances/migrations/0002_permissionset.py

@@ -0,0 +1,24 @@
+# Generated by Django 2.2.12 on 2020-05-27 07:01
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('instances', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='PermissionSet',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+            ],
+            options={
+                'permissions': (('clone_instances', 'Can clone instances'),),
+                'managed': False,
+                'default_permissions': (),
+            },
+        ),
+    ]

instances/migrations/0003_migrate_can_clone_instances.py

@@ -0,0 +1,35 @@
+from django.db import migrations
+
+
+def migrate_can_clone_instances(apps, schema_editor):
+    from django.contrib.auth.models import User, Permission
+    user: User
+    users = User.objects.all()
+
+    permission = Permission.objects.get(codename='clone_instances')
+
+    for user in users:
+        if user.userattributes.can_clone_instances:
+            user.user_permissions.add(permission)
+
+
+def reverse_can_clone_instances(apps, schema_editor):
+    from django.contrib.auth.models import User, Permission
+    user: User
+    users = User.objects.all()
+
+    permission = Permission.objects.get(codename='clone_instances')
+
+    for user in users:
+        user.user_permissions.remove(permission)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('instances', '0002_permissionset'),
+    ]
+
+    operations = [
+        migrations.RunPython(migrate_can_clone_instances, reverse_can_clone_instances),
+    ]

instances/models.py

@@ -1,4 +1,7 @@
-from django.db.models import Model, ForeignKey, CharField, BooleanField, DateField, CASCADE
+from django.db.models import (CASCADE, BooleanField, CharField, DateField,
+                              ForeignKey, Model)
+from django.utils.translation import ugettext_lazy as _
+
 from computes.models import Compute
 
 
@@ -11,3 +14,15 @@ class Instance(Model):
 
     def __unicode__(self):
         return self.name
+
+class PermissionSet(Model):
+    """
+    Dummy model for holding set of permissions we need to be automatically added by Django
+    """
+    class Meta:
+        default_permissions = ()
+        permissions = (
+            ('clone_instances', _('Can clone instances')),
+        )
+
+        managed = False