diff options
Diffstat (limited to 'mediagoblin/db/migrations.py')
| -rw-r--r-- | mediagoblin/db/migrations.py | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/mediagoblin/db/migrations.py b/mediagoblin/db/migrations.py index 167c4f87..9d1218fe 100644 --- a/mediagoblin/db/migrations.py +++ b/mediagoblin/db/migrations.py @@ -15,6 +15,7 @@ # along with this program. If not, see <http://www.gnu.org/licenses/>. import datetime +import uuid from sqlalchemy import (MetaData, Table, Column, Boolean, SmallInteger, Integer, Unicode, UnicodeText, DateTime, @@ -212,7 +213,6 @@ def mediaentry_new_slug_era(db): - slugs with = (or also : which is now also not allowed) to have those stripped out (small possibility of breakage here sadly) """ - import uuid def slug_and_user_combo_exists(slug, uploader): return db.execute( @@ -251,3 +251,39 @@ def mediaentry_new_slug_era(db): row, row.slug.replace(u"=", u"-").replace(u":", u"-")) db.commit() + + +@RegisterMigration(10, MIGRATIONS) +def unique_collections_slug(db): + """Add unique constraint to collection slug""" + metadata = MetaData(bind=db.bind) + collection_table = inspect_table(metadata, "core__collections") + existing_slugs = {} + slugs_to_change = [] + + for row in db.execute(collection_table.select()): + # if duplicate slug, generate a unique slug + if row.creator in existing_slugs and row.slug in \ + existing_slugs[row.creator]: + slugs_to_change.append(row.id) + else: + if not row.creator in existing_slugs: + existing_slugs[row.creator] = [row.slug] + else: + existing_slugs[row.creator].append(row.slug) + + for row_id in slugs_to_change: + new_slug = uuid.uuid4().hex + db.execute(collection_table.update(). + where(collection_table.c.id == row_id). + values(slug=new_slug)) + # sqlite does not like to change the schema when a transaction(update) is + # not yet completed + db.commit() + + constraint = UniqueConstraint('creator', 'slug', + name='core__collection_creator_slug_key', + table=collection_table) + constraint.create() + + db.commit() |