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)。
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) # 内部使用
@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‘))
exts.py:
from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()
主py：
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_, and_
from models import Question,User,Comment
app = Flask(__name__)
app.config.from_object(config)
db.init_app(app)
