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_sqlalchemy import SQLAlchemy import config from flask import Flask,render_template,request,redirect, url_for,session from functools import wraps from datetime import datetime from sqlalchemy import or_,and_ from models import Comment,Question,User from exts import db from werkzeug.security import generate_password_hash,check_password_hash app = Flask(__name__) app.config.from_object(config) db.init_app(app)
from flask_sqlalchemy import SQLAlchemy db=SQLAlchemy
from datetime import datetime from werkzeug.security import generate_password_hash,check_password_hash from untitled 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(50)) @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.Date,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‘)) detail=db.Column(db.Text,nullable=False) creat_time=db.Column(db.DateTime,default=datetime.now) question=db.relationship(‘Question‘,backref=db.backref(‘comments‘,order_by=creat_time.desc)) author=db.relationship(‘User‘,backref=db.backref(‘comments‘))