Let convert_mongo_to_sql add Migration Records

The mongosql tool is really dumping directly into the sql
database and is trying not to use too much logic that might
change later.

So this means, it needs to create the migration records on
its own!
So add a bunch of records with version=0.

mediagoblin/db/sql/convert.py

@@ -20,7 +20,7 @@ from mediagoblin.init import setup_global_and_app_config, setup_database
 from mediagoblin.db.mongo.util import ObjectId
 
 from mediagoblin.db.sql.models import (Base, User, MediaEntry, MediaComment,
-    Tag, MediaTag, MediaFile, MediaAttachmentFile)
+    Tag, MediaTag, MediaFile, MediaAttachmentFile, MigrationData)
 from mediagoblin.media_types.image.models import ImageData
 from mediagoblin.media_types.video.models import VideoData
 from mediagoblin.db.sql.open import setup_connection_and_db_from_config as \
@@ -189,6 +189,20 @@ def convert_media_comments(mk_db):
     session.close()
 
 
+def convert_add_migration_versions():
+    session = Session()
+
+    for name in ("__main__",
+                 "mediagoblin.media_types.image",
+                 "mediagoblin.media_types.video",
+                 ):
+        m = MigrationData(name=name, version=0)
+        session.add(m)
+
+    session.commit()
+    session.close()
+
+
 def run_conversion(config_name):
     global_config, app_config = setup_global_and_app_config(config_name)
 
@@ -209,6 +223,8 @@ def run_conversion(config_name):
     Session.remove()
     convert_media_comments(mk_db)
     Session.remove()
+    convert_add_migration_versions()
+    Session.remove()
 
 
 if __name__ == '__main__':