@classmethod
  def get_by_blob_key(cls, old_blob_key):
    return cls.get_by_key_name(str(old_blob_key))
Fetches the BlobMigrationRecord for the given blob key.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/blobstore/blobstore.py/BlobMigrationRecord.get_by_blob_key