Audio: Add models and disable media_data.

1. Add a super-minimal media_data table for audio.
   It currently contains nothing.
   Like the ascii one.

2. To avoid media_data trouble -- for now -- disable the
   creation of media_data completrly.

mediagoblin/media_types/audio/models.py

@@ -0,0 +1,36 @@
+# GNU MediaGoblin -- federated, autonomous media hosting
+# Copyright (C) 2011, 2012 MediaGoblin contributors.  See AUTHORS.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+from mediagoblin.db.sql.base import Base
+
+from sqlalchemy import (
+    Column, Integer, ForeignKey)
+from sqlalchemy.orm import relationship, backref
+
+
+class AudioData(Base):
+    __tablename__ = "audio__mediadata"
+
+    # The primary key *and* reference to the main media_entry
+    media_entry = Column(Integer, ForeignKey('core__media_entries.id'),
+        primary_key=True)
+    get_media_entry = relationship("MediaEntry",
+        backref=backref("audio__media_data", cascade="all, delete-orphan"))
+
+
+DATA_MODEL = AudioData
+MODELS = [AudioData]

mediagoblin/media_types/audio/processing.py

@@ -72,8 +72,7 @@ def process_audio(entry):
 
         entry.media_files['ogg'] = ogg_filepath
 
-        entry.media_data['audio'] = {
+        # entry.media_data_init(length=int(data.audiolength))
-            u'length': int(data.audiolength)}
 
     if audio_config['create_spectrogram']:
         spectrogram_filepath = create_pub_filepath(