在SQLAlchemy中,如何创建"MySQL日期"列？

Question

class Posts(Base):
    __tablename__ = 'posts_posts'
    id = Column(Integer, primary_key = True)
    user_id = Column(Integer, nullable=False)
    body = Column(Text, nullable=True)

    created_at = Column(Date) << is this right?
    updated_at = Column(Date) ??

我还希望该created_at列能够自动设置创建日期.此外,还有updated_at用于在此行更改时随时设置日期的列.

Answer 1

您可以提供default和onupdate参数Column:

def _get_date():
    return datetime.datetime.now()

class Posts(Base):
    #...
    created_at = Column(Date, default=_get_date)
    updated_at = Column(Date, onupdate=_get_date)

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