Fixed #19154 - Noted commit_manually requires commit/rollback for reads

    transactions. It tells Django you'll be managing the transaction on your

    own.

    If your view changes data and doesn't ``commit()`` or ``rollback()``,

    Django will raise a ``TransactionManagementError`` exception.

    Whether you are writing or simply reading from the database, you must

    ``commit()`` or ``rollback()`` explicitly or Django will raise a

    :exc:`TransactionManagementError` exception. This is required when reading

    from the database because ``SELECT`` statements may call functions which

    modify tables, and thus it is impossible to know if any data has been

    modified.

    Manual transaction management looks like this::