rrs: link maintenance/upstream history to layerbranch

RecipeUpstreamHistory was not linked to the layer it was produced from,
which meant that it wasn't easy to query for a different maintenance
plan (i.e. a different layer) and thus the maintenance plan selection
on the recipe list didn't really work. Add a link field, populate it in
a migration and then make it required.

We had added a link earlier from RecipeMaintainerHistory to LayerBranch
but it was optional; for the same reasons we now populate it and make it
required.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/rrs/migrations/0016_rmh_layerbranch_nonnull.py b/rrs/migrations/0016_rmh_layerbranch_nonnull.py
new file mode 100644
index 0000000000..5c192fd571
--- /dev/null
+++ b/rrs/migrations/0016_rmh_layerbranch_nonnull.py
@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('rrs', '0015_rmh_layerbranch_populate'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='recipemaintainerhistory',
+            name='layerbranch',
+            field=models.ForeignKey(to='layerindex.LayerBranch'),
+        ),
+    ]