Cascade release deletion to dependencies (#3210)

Author: di

warehouse/migrations/versions/c0302a8a0878_cascade_release_deletion_to_dependencies.py

@@ -0,0 +1,52 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+Cascade Release deletion to Dependencies
+
+Revision ID: c0302a8a0878
+Revises: 701c2fba1f5f
+Create Date: 2018-03-09 23:19:40.624047
+"""
+
+from alembic import op
+
+revision = 'c0302a8a0878'
+down_revision = '701c2fba1f5f'
+
+
+def upgrade():
+    op.drop_constraint(
+        'release_dependencies_name_fkey',
+        'release_dependencies',
+        type_='foreignkey'
+    )
+    op.create_foreign_key(
+        'release_dependencies_name_fkey',
+        'release_dependencies',
+        'releases', ['name', 'version'], ['name', 'version'],
+        onupdate='CASCADE',
+        ondelete='CASCADE'
+    )
+
+
+def downgrade():
+    op.drop_constraint(
+        'release_dependencies_name_fkey',
+        'release_dependencies',
+        type_='foreignkey'
+    )
+    op.create_foreign_key(
+        'release_dependencies_name_fkey',
+        'release_dependencies',
+        'releases', ['name', 'version'], ['name', 'version'],
+        onupdate='CASCADE'
+    )

warehouse/packaging/models.py

@@ -221,6 +221,7 @@ class Dependency(db.Model):
             ["name", "version"],
             ["releases.name", "releases.version"],
             onupdate="CASCADE",
+            ondelete="CASCADE",
         ),
     )
     __repr__ = make_repr("name", "version", "kind", "specifier")