模型分离(选做)
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)。
主py
from flask import Flask,render_template,request,redirect,url_for,session import config from functools import wraps from sqlalchemy import or_ from models import Question,User,Comment from exts import db app = Flask(__name__) app.config.from_object("config") db.init_app(app)
models.py
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) nickname = db.Column(db.String(20)) @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) create_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) detail = db.Column(db.Text, nullable=False) create_time = db.Column(db.DateTime, default=datetime.now) author_id = db.Column(db.Integer, db.ForeignKey("user.id")) question_id=db.Column(db.Integer,db.ForeignKey("question.id")) author = db.relationship("User", backref=db.backref('comment')) question = db.relationship("Question",backref=db.backref("comment",order_by=create_time.desc))
exts.py
from flask_sqlalchemy import SQLAlchemy db=SQLAlchemy()