get_row.py 文件源码

def get_row_by_FK(model, FK_name, FK_id, is_required=False, **kwargs):
    """Get a unique row a FK id or return an empty row.

    Parameters
    ----------
    FK_id : int
    FK_name : str
    is_required : bool
    model : BaseModel

    Returns
    -------
    row
    """
    if FK_id:
        try:
            row = model.get(getattr(model, FK_name) == FK_id)
        except DoesNotExist:
            if is_required:
                raise
            else:
                row = model()
    else:
        row = model()

    return row