def chained_join(*relationships):
    """
    Return a chained Join object for given relationships.
    """
    property_ = relationships[0].property
    if property_.secondary is not None:
        from_ = property_.secondary.join(property_.mapper.class_.__table__,
            property_.secondaryjoin)
    else:
        from_ = property_.mapper.class_.__table__
    for relationship in relationships[1:]:
        prop = relationship.property
        if prop.secondary is not None:
            from_ = from_.join(prop.secondary, prop.primaryjoin)
            from_ = from_.join(prop.mapper.class_, prop.secondaryjoin)
        else:
            from_ = from_.join(prop.mapper.class_, prop.primaryjoin)
    return from_
