模型分离

Posted 2020-10-19 J芷璇

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
    telephone = db.Column(db.String(11), nullable=False)

    @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‘))  # 这个不会在表单里面出现，只是与user建立一个映射关系

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‘))
    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 flask import Flask, render_template, request, redirect, url_for, session
from flask_sqlalchemy import SQLAlchemy
import config
from functools import wraps

from sqlalchemy import or_, and_
from models import Question,User,Comment
from exts import db


app = Flask(__name__)
app.config.from_object(config)
db.init_app(app)