rrs: add Release link to MaintenancePlan

If any Releases exist then we create a default MaintenancePlan and then
link all Releases to it - this needs to be done in multiple upgrade
steps since the field needs to be non-null.

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

rrs/migrations/0003_release_plan.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', '0002_maintenanceplan'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='release',
+            name='plan',
+            field=models.ForeignKey(null=True, to='rrs.MaintenancePlan'),
+        ),
+    ]

rrs/migrations/0004_maint_plan_default.py

@@ -0,0 +1,39 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import settings
+
+
+def populate_plan(apps, schema_editor):
+    Release = apps.get_model('rrs', 'Release')
+    MaintenancePlan = apps.get_model('rrs', 'MaintenancePlan')
+    LayerBranch = apps.get_model('layerindex', 'LayerBranch')
+    MaintenancePlanLayerBranch = apps.get_model('rrs', 'MaintenancePlanLayerBranch')
+
+    if Release.objects.all().exists():
+        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 - please set up the layerindex application first' % settings.CORE_LAYER_NAME)
+        maintplan = MaintenancePlan()
+        maintplan.name = 'Default'
+        maintplan.description = 'Created upon database upgrade'
+        maintplan.save()
+        for row in Release.objects.all():
+            row.plan = maintplan
+            row.save()
+        maintplanlayerbranch = MaintenancePlanLayerBranch(plan=maintplan, layerbranch=core_layerbranch)
+        maintplanlayerbranch.save();
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('rrs', '0003_release_plan'),
+    ]
+
+    operations = [
+        migrations.RunPython(populate_plan, reverse_code=migrations.RunPython.noop),
+    ]

rrs/migrations/0005_release_plan_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', '0004_maint_plan_default'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='release',
+            name='plan',
+            field=models.ForeignKey(to='rrs.MaintenancePlan'),
+        ),
+    ]

rrs/models.py

@@ -31,6 +31,7 @@ class MaintenancePlanLayerBranch(models.Model):
         verbose_name_plural = "Maintenance plan layer branches"
 
 class Release(models.Model):
+    plan = models.ForeignKey(MaintenancePlan)
     name = models.CharField(max_length=100, unique=True)
     start_date = models.DateField(db_index=True)
     end_date = models.DateField(db_index=True)