77 lines
2.7 KiB
Python
77 lines
2.7 KiB
Python
# GNU MediaGoblin -- federated, autonomous media hosting
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# Copyright (C) 2011, 2012 MediaGoblin contributors. See AUTHORS.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from mediagoblin.db.base import Session
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from mediagoblin.db.models import MediaEntry, Tag, MediaTag, Collection
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##########################
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# Random utility functions
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##########################
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def atomic_update(table, query_dict, update_values):
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table.query.filter_by(**query_dict).update(update_values,
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synchronize_session=False)
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Session.commit()
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def check_media_slug_used(uploader_id, slug, ignore_m_id):
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query = MediaEntry.query.filter_by(uploader=uploader_id, slug=slug)
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if ignore_m_id is not None:
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query = query.filter(MediaEntry.id != ignore_m_id)
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does_exist = query.first() is not None
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return does_exist
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def media_entries_for_tag_slug(dummy_db, tag_slug):
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return MediaEntry.query \
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.join(MediaEntry.tags_helper) \
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.join(MediaTag.tag_helper) \
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.filter(
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(MediaEntry.state == u'processed')
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& (Tag.slug == tag_slug))
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def clean_orphan_tags(commit=True):
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"""Search for unused MediaTags and delete them"""
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q1 = Session.query(Tag).outerjoin(MediaTag).filter(MediaTag.id==None)
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for t in q1:
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Session.delete(t)
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# The "let the db do all the work" version:
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# q1 = Session.query(Tag.id).outerjoin(MediaTag).filter(MediaTag.id==None)
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# q2 = Session.query(Tag).filter(Tag.id.in_(q1))
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# q2.delete(synchronize_session = False)
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if commit:
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Session.commit()
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def check_collection_slug_used(creator_id, slug, ignore_c_id):
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filt = (Collection.creator == creator_id) \
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& (Collection.slug == slug)
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if ignore_c_id is not None:
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filt = filt & (Collection.id != ignore_c_id)
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does_exist = Session.query(Collection.id).filter(filt).first() is not None
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return does_exist
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if __name__ == '__main__':
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from mediagoblin.db.open import setup_connection_and_db_from_config
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db = setup_connection_and_db_from_config({'sql_engine':'sqlite:///mediagoblin.db'})
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clean_orphan_tags()
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