Assocate StoryTag with Story via mapping

A story can have more than one tag. A tag can be on more than one story.

Change-Id: I74c21ab3dcd2fb793df962ed7b425331e199886d

storyboard/db/migration/alembic_migrations/versions/023_story_tags.py

@@ -0,0 +1,56 @@
+# 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.
+#
+
+"""Add story and tag mapping table.
+
+Revision ID: 023
+Revises: 022
+Create Date: 2014-08-13 13:47:29.795996
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '023'
+down_revision = '022'
+
+
+from alembic import op
+import sqlalchemy as sa
+
+MYSQL_ENGINE = 'InnoDB'
+MYSQL_CHARSET = 'utf8'
+
+
+def upgrade(active_plugins=None, options=None):
+
+    ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('story_storytags',
+        sa.Column('story_id', sa.Integer(), nullable=True),
+        sa.Column('storytag_id', sa.Integer(), nullable=True),
+        mysql_engine=MYSQL_ENGINE,
+        mysql_charset=MYSQL_CHARSET
+    )
+    op.drop_constraint('storytags_ibfk_1', 'storytags', type_='foreignkey')
+    op.drop_column(u'storytags', u'story_id')
+    ### end Alembic commands ###
+
+
+def downgrade(active_plugins=None, options=None):
+
+    ### commands auto generated by Alembic - please adjust! ###
+    op.add_column(u'storytags',
+                  sa.Column('story_id', sa.Integer(), nullable=True))
+    op.create_foreign_key('storytags_ibfk_1', 'storytags',
+                          'stories', ['story_id'], ['id'])
+    op.drop_table('story_storytags')
+    ### end Alembic commands ###

storyboard/db/models.py

@@ -170,6 +170,13 @@ class ProjectGroup(Base):
     _public_fields = ["id", "name", "title", "projects"]
 
 
+story_storytags = Table(
+    'story_storytags', Base.metadata,
+    Column('story_id', Integer, ForeignKey('stories.id')),
+    Column('storytag_id', Integer, ForeignKey('storytags.id')),
+)
+
+
 class Story(FullText, Base):
     __tablename__ = 'stories'
 
@@ -182,7 +189,7 @@ class Story(FullText, Base):
     is_bug = Column(Boolean, default=True)
     tasks = relationship('Task', backref='story')
     events = relationship('TimeLineEvent', backref='story')
-    tags = relationship('StoryTag', backref='story')
+    tags = relationship('StoryTag', secondary='story_storytags')
 
     _public_fields = ["id", "creator_id", "title", "description", "is_bug",
                       "tasks", "events", "tags"]
@@ -207,11 +214,12 @@ class Task(FullText, Base):
 
 
 class StoryTag(Base):
+    __tablename__ = 'storytags'
     __table_args__ = (
         schema.UniqueConstraint('name', name='uniq_story_tags_name'),
     )
     name = Column(String(20))
-    story_id = Column(Integer, ForeignKey('stories.id'))
+    stories = relationship('StoryTag', secondary='story_storytags')
 
 
 # Authorization models