dashboard: allow negative tile order (#21005)

combo/apps/dashboard/migrations/0002_auto_20180105_0846.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('dashboard', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='tile',
+            name='order',
+            field=models.IntegerField(),
+        ),
+    ]

combo/apps/dashboard/models.py

@@ -55,7 +55,7 @@ class Tile(models.Model):
     cell_pk = models.PositiveIntegerField()
     cell = fields.GenericForeignKey('cell_type', 'cell_pk')
     user = models.ForeignKey(settings.AUTH_USER_MODEL)
-    order = models.PositiveIntegerField()
+    order = models.IntegerField()
 
     class Meta:
         ordering = ('order',)