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。
新建exts.py,将db = SQLAlchemy()的定义放到这个独立的文件中。
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 flask import Flask,render_template,request,redirect,url_for,session import config from functools import wraps from sqlalchemy import or_,and_ from database import Question,User,Comment from decorate import db app = Flask(__name__) app.config.from_object(config) db.init_app(app) # db.create_all()
from flask_sqlalchemy import SQLAlchemy db=SQLAlchemy()
from datetime import datetime from werkzeug.security import generate_password_hash,check_password_hash from decorate 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) nickname = db.Column(db.String(20), nullable=True) @property def password(self): 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__ = ‘commment‘ 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‘)) detail=db.Column(db.Text,nullable=False) creat_time = db.Column(db.DateTime, default=datetime.now) question=db.relationship(‘Question‘,backref=db.backref(‘comments‘)) author=db.relationship(‘User‘,backref=db.backref(‘comments‘))