Merge pull request #25 from fedora-infra/feature/cascade-removed-rules

Cascade removed rules to their filters.

alembic/versions/3de9ad66862f_cascade_removed_rules_to_filters.py

@@ -0,0 +1,44 @@
+"""Cascade removed rules to filters
+
+Revision ID: 3de9ad66862f
+Revises: 2136a1f22f1f
+Create Date: 2015-01-12 15:47:02.778152
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '3de9ad66862f'
+down_revision = '2136a1f22f1f'
+
+from alembic import op
+import sqlalchemy as sa
+
+import fmn.lib
+
+
+def upgrade():
+    engine = op.get_bind().engine
+    session = sa.orm.scoped_session(sa.orm.sessionmaker(bind=engine))
+
+    # In alembic revision '2136a1f22f1f' these filters has the rules attached
+    # that were removed.  The filters need to be removed too.
+    goners = [
+        'Users removed from packages I own',
+        'New branches for packages I own',
+        'Retirement of packages I own',
+    ]
+
+    for name in goners:
+        filters = session.query(fmn.lib.models.Filter)\
+            .filter_by(name=name).all()
+        for fltr in filters:
+            while fltr.rules:
+                rule = fltr.rules.pop()
+                print "* Deleting rule %r." % rule
+                session.delete(rule)
+            print "Deleting filter %r." % fltr
+            session.delete(fltr)
+
+
+def downgrade():
+    pass