Make mediagoblin SQL models all use a consistent table naming scheme

mediagoblin/media_types/ascii/models.py

@@ -23,11 +23,11 @@ from sqlalchemy import (
 
 
 class AsciiData(Base):
-    __tablename__ = "ascii_data"
+    __tablename__ = "ascii__mediadata"
 
     id = Column(Integer, primary_key=True)
     media_entry = Column(
-        Integer, ForeignKey('media_entries.id'), nullable=False)
+        Integer, ForeignKey('core__media_entries.id'), nullable=False)
 
 
 DATA_MODEL = AsciiData

mediagoblin/media_types/image/models.py

@@ -5,10 +5,10 @@ from sqlalchemy import (
 
 
 class ImageData(Base):
-    __tablename__ = "image_data"
+    __tablename__ = "image__mediadata"
 
     # The primary key *and* reference to the main media_entry
-    media_entry = Column(Integer, ForeignKey('media_entries.id'),
+    media_entry = Column(Integer, ForeignKey('core__media_entries.id'),
         primary_key=True)
     width = Column(Integer)
     height = Column(Integer)

mediagoblin/media_types/video/models.py

@@ -22,10 +22,10 @@ from sqlalchemy import (
 
 
 class VideoData(Base):
-    __tablename__ = "video_data"
+    __tablename__ = "video__mediadata"
 
     # The primary key *and* reference to the main media_entry
-    media_entry = Column(Integer, ForeignKey('media_entries.id'),
+    media_entry = Column(Integer, ForeignKey('core__media_entries.id'),
         primary_key=True)
     width = Column(SmallInteger)
     height = Column(SmallInteger)