Flask-SQLAlchemy安装和建表操作请参考这里。
# Role表
class Role(db.Model):
id=db.Column(db.Integer,primary_key=True)
name=db.Column(db.String(80))
# RoleType表
class Role_type(db.Model):
query_class=Common_list_name_Query
id=db.Column(db.Integer,primary_key=True)
name=db.Column(db.String(120))
一对一
只需要在属性里改变下定义
# Role表
class Role(db.Model):
role_type_id=db.Column(db.Integer,db.ForeignKey('role_type.id'))
role=db.relationship('Role',backref='role_type',lazy='dynamic', uselist=False)
一对多
# 一对多需要在两个表内斗填上相互的关系
class Role(db.Model):
role_type_id=db.Column(db.Integer,db.ForeignKey('role_type.id'))
class Role_type(db.Model):
roles=db.relationship('Role',backref='role_type',lazy='dynamic')
具体参数可以参考如下的文档:
http://flask.pocoo.org/docs/patterns/sqlalchemy/
http://packages.python.org/Flask-SQLAlchemy/

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