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  • 模型分离(2017.12.26)

    模型分离--让代码更方便管理

    新建models.py,将模型定义全部放到这个独立的文件中。

    from datetime import datetime
    from werkzeug.security import generate_password_hash,check_password_hash
    from exts import db
    
    class User(db.Model):
        __tablename__ = 'user'
        id = db.Column(db.Integer, primary_key=True, autoincrement=True)
        username = db.Column(db.String(20), nullable=False)
        _password = db.Column(db.String(200), nullable=False)#内部使用
    
        @property
        def password(self):#外部使用
            return self._password
    
        @password.setter
        def password(self,row_password):
            self._password=generate_password_hash(row_password)
    
        def check_password(self,row_password):
            result=check_password_hash(self._password,row_password)
            return result
    
    class Question(db.Model):
        __tablename__ = 'question'
        id = db.Column(db.Integer, primary_key=True, autoincrement=True)
        title = db.Column(db.String(100), nullable=False)
        detail = db.Column(db.Text, nullable=False)
        creat_time = db.Column(db.DateTime, default=datetime.now)
        author_id = db.Column(db.Integer, db.ForeignKey('user.id'))
        author = db.relationship('User', backref=db.backref('question'))
    
    class Comment(db.Model):
        __tablename__ = 'comment'
        id = db.Column(db.Integer, primary_key=True, autoincrement=True)
        author_id = db.Column(db.Integer, db.ForeignKey('user.id'))
        question_id = db.Column(db.Integer, db.ForeignKey('question.id'))
        creat_time = db.Column(db.DateTime, default=datetime.now)
        detail = db.Column(db.Text, nullable=False)
        question = db.relationship('Question', backref=db.backref('comments',order_by=creat_time.desc))
        author = db.relationship('User', backref=db.backref('comments'))

    新建exts.py,将db = SQLAlchemy()的定义放到这个独立的文件中。

    from flask_sqlalchemy import SQLAlchemy
    db=SQLAlchemy()

    models.py和主py文件,都从exts.py中导入db。

    在主py文件中,对db进行始化,db.init_app(app)。

    from models import  Question,User,Comment
    from exts import db
    
    app = Flask(__name__)
    app.config.from_object(config)
    db.init_app(app)
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  • 原文地址:https://www.cnblogs.com/laidaili/p/8116487.html
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