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)。
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=TabError, 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): # 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'))
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'))
creat_time = db.Column(db.DateTime, default=datetime.now)
detail = db.Column(db.Text, nullable=False)
question = db.relationship('Question', backref=db.backref('comments'), order_by=creat_time.desc)
author = db.relationship('User', backref=db.backref('comments'))
from flask_sqlalchemy import SQLAlchemy
db=SQLAlchemy
from models import Question,User,Comment
from exts import db
app = Flask(__name__)
app.config.from_object(config)
db.init_app(app)