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, 29 insertions, 0 deletions

diff --git a/rrs/migrations/0013_reup_layerbranch_populate.py b/rrs/migrations/0013_reup_layerbranch_populate.py
new file mode 100644
index 0000000000..f5e88a76c4
--- /dev/null
+++ b/rrs/migrations/0013_reup_layerbranch_populate.py
@@ -0,0 +1,29 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import settings
+
+
+def populate_layerbranch(apps, schema_editor):
+    RecipeUpstreamHistory = apps.get_model('rrs', 'RecipeUpstreamHistory')
+    LayerBranch = apps.get_model('layerindex', 'LayerBranch')
+    if not settings.CORE_LAYER_NAME:
+        raise Exception('Please set CORE_LAYER_NAME in settings.py')
+    core_layerbranch = LayerBranch.objects.filter(layer__name=settings.CORE_LAYER_NAME).first()
+    if not core_layerbranch:
+        raise Exception('Unable to find core layer "%s" specified in CORE_LAYER_NAME in settings.py' % settings.CORE_LAYER_NAME)
+    for row in RecipeUpstreamHistory.objects.all():
+        row.layerbranch = core_layerbranch
+        row.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('rrs', '0012_reup_layerbranch_field'),
+    ]
+
+    operations = [
+        migrations.RunPython(populate_layerbranch, reverse_code=migrations.RunPython.noop),
+    ]