單表更新
db.session.query(Article).filter(Article.id==model.id).update({Article.status:-1})
db.session.commit()
或
art = Article.query.get(post_id)
art.view_times = art.view_times+_times
db.session.commit()
one to one
class UserProfile(db.Model):
__tablename__ = 't_user_profile'
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
parent_id = db.Column(db.Integer, db.ForeignKey('t_user.id'))
user = db.relationship("User", back_populates="user_profile")
nick_name = db.Column(db.String(12))
address = db.Column(db.String(128))
copyright = db.Column(db.String(256))
class User(UserMixin, db.Model):
__tablename__ = 't_user'
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
username = db.Column(db.String(64), unique=True)
img = db.Column(db.String(200), default='/static/local/img/default.jpg')
email = db.Column(db.String(100), unique=True)
password_hash = db.Column(db.String(128), unique=False)
is_super = db.Column(db.Integer, default=-1)
is_active = db.Column(db.Integer, default=1)
create_time = db.Column(db.DateTime, default=datetime.now())
user_profile = db.relationship("UserProfile", uselist=False, back_populates="user")
many to many
articles = db.Table('t_columns_articles',
db.Column('column_id', db.Integer, db.ForeignKey('t_column.id')),
db.Column('article_id', db.Integer, db.ForeignKey('t_article.id'))
)
class Article(db.Model):
__tablename__ = 't_article'
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
title = db.Column(db.String(100))
tags = db.Column(db.String(200))
content = db.Column(db.Text)
class Column(db.Model):
__tablename__ = 't_column'
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
name = db.Column(db.String(40))
summary = db.Column(db.Text)
status = db.Column(db.Integer, default=1)
執(zhí)行sql
sql = text('''(select id,title,'pre' as 'pre_next' from t_article where id < %s and status=1 order by id desc limit 1)
union all
(select id,title,'next' from t_article where id > %s and status=1 order by id asc limit 1)''' % (post_id,post_id))
pre_next = db.session.connection().execute(sql).fetchall()
返回結(jié)果為列表形式，如
((1,'test blog','next'),(2,'test blog2','pre'))
