模型分離--讓代碼更方便管理sql
新建models.py,將模型定義所有放到這個獨立的文件中。flask
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) @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) creatTime=db.Column(db.DateTime,default=datetime.now) authorID=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) creatTime=db.Column(db.DateTime,default=datetime.now) question=db.relationship('Question',backref=db.backref('comments',order_by=creatTime.desc)) author=db.relationship('User',backref=db.backref('comments'))
新建exts.py,將db = SQLAlchemy()的定義放到這個獨立的文件中。session
from flask_sqlalchemy import SQLAlchemy db = SQLAlchemy()
models.py和主py文件,都從exts.py中導入db。app
在主py文件中,對db進行始化,db.init_app(app)。url
from flask import Flask, render_template,request,redirect,url_for,session import config from functools import wraps from exts import db from sqlalchemy import or_ from models import Question,User,Comment app = Flask(__name__) app.config.from_object(config) db.init_app(app)