我来自一个python-django,我正试图掌握烧瓶 - SQLAlchemy:
class Author(db.Model):
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
name = db.Column(db.String(128), nullable=False)
class Book(db.Model):
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
title = db.Column(db.String(128), nullable=False)
author = db.Column(db.Integer, db.ForeignKey('author.id'), nullable=False)
我想获得一个联合结果列表:
results = Book.query.filter(Author.name=='tom')
for result in results:
print(result.title, result.???.name)
如何访问已连接表格的字段?
答案 0 :(得分:0)
我明白了:
class Book(db.Model):
id = db.Column(db.Integer, primary_key=True, autoincrement=True)
title = db.Column(db.String(128), nullable=False)
author_id = db.Column(db.Integer, db.ForeignKey('author.id'), nullable=False)
author = relationship("Author")
我需要添加一行
author = relationship("Author")
到模特。似乎有必要在对象级别声明关系。我确实想念这个。
现在该行可以是:
print(result.title, result.author.name)