class Argument(Base):
    """
    TODO
    """
    __tablename__ = 'arguments'
    uid = sa.COLUMN(sa.INTEGER, primary_key=TRUE)
    premissegroup_uid = sa.COLUMN(sa.INTEGER, sa.ForeignKey(PremisseGroups.uid))
    conclusion_uid = sa.COLUMN(sa.INTEGER, sa.ForeignKey(Statement.uid))
    argument_uid = sa.COLUMN(sa.INTEGER, sa.ForeignKey(Argument.uid), NULLABLE=TRUE)
    isSupportive = sa.COLUMN(sa.BOOLEAN, NULLABLE=FALSE)
    author_uid = sa.COLUMN(sa.INTEGER, sa.ForeignKey(USER.uid))
    TIMESTAMP = sa.COLUMN(sa.DateTime(timezone=TRUE), DEFAULT=func.now())
    weight = sa.COLUMN(sa.INTEGER, NULLABLE=FALSE)