模型分离(选做)

模型分离--让代码更方便管理

1.新建models.py,将模型定义全部放到这个独立的文件中。

2.新建exts.py,将db = SQLAlchemy()的定义放到这个独立的文件中。

3.models.py和主py文件,都从exts.py中导入db。

4.在主py文件中,对db进行始化,db.init_app(app)。

 

1.代码如下:

models.py

from werkzeug.security import generate_password_hash,check_password_hash
from datetime import datetime
from exts import db



class User(db.Model):
    __tablename__ = 'user'
    # 建立一个表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)
    image = db.Column(db.String(100))
    say = 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
#db.create_all()
# 建立一表question
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'))
    classify=db.Column(db.Enum('散文拾贝', '心灵鸡汤','笑谈风声', '随心所欲'),nullable=False)
    click = db.Column(db.INT, default=0)


# db.create_all()



# class Log(db.Model):
#     __tablename__ = 'log'
#     # 建立一个表log
#     id = db.Column(db.Integer,primary_key=True,autoincrement=True)
#     username = db.Column(db.String(20),nullable=False)
#     password = db.Column(db.String(20),nullable=False)


#db.create_all()


class Comment(db.Model):
    __tablename__ = 'comment'
    # 建立一个表log
    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'))
    creat_time = db.Column(db.DateTime,default=datetime.now)
    detail = db.Column(db.Text,nullable=False)
    question = db.relationship('Question', backref=db.backref('comment',order_by=creat_time.desc))
    author=db.relationship('User',backref=db.backref('comment'))
#db.create_all()

2.exts.py

from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()

3

from exts import db

 

4.主py

from flask import Flask
from flask import render_template,request,redirect,url_for,session
import config
from sqlalchemy import  or_ ,and_
from functools import wraps
from models import Question,User,Comment
from exts import db
app = Flask(__name__)
app.config.from_object(config)
db.init_app(app)

 

posted on 2017-12-27 15:44  046余博智  阅读(196)  评论(0编辑  收藏  举报

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