发布功能完成。

编写要求登录的装饰器 from functools import wraps def loginFirst(func): #参数是函数 @wraps(func)      

def wrapper(*args, ** kwargs): #定义个函数将其返回           

#要求登录           

return func(*args, ** kwargs)      

return wrapper #返回一个函数 应用装饰器，要求在发布前进行登录，登录后可发布。

@app.route('/question/',methods=['GET','POST'])

@loginFirst def question(): 建立发布内容的对象关系映射。

class Question(db.Model):完成发布函数。

保存到数据库。

重定向到首页。

index.py

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

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


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(20), nullable=False)
    nickname = db.Column(db.String(20))

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'))



db.create_all()

@app.route('/')
def shouye():
    return render_template('text.html')


@app.route('/zhuce',methods=['GET','POST'])
def zhuce():
    if request.method == 'GET':
        return render_template('zhuce.html')
    else:
        username = request.form.get('username')
        password = request.form.get('password')
        nickname = request.form.get('nickname')
        user1 = User.query.filter(User.username == username).first()
    if user1:
        return 'username existed'
    else:
        user1 = User(username=username, password=password, nickname=nickname)
        db.session.add(user1)
        db.session.commit()
        return redirect(url_for('denglu'))



@app.route('/denglu',methods=['GET','POST'])
def denglu():
    if request.method == 'GET':
        return render_template('denglu.html')
    else:
        username = request.form.get('username')
        password = request.form.get('password')
        user=User.query.filter(User.username == username).first()
    if user:
        if user.password == password:
            session['user'] = username
            session.permanent = True
            return redirect(url_for('shouye'))
        else:
            return 'password error'
    else:
        return 'username is not existed'



@app.route('/logout/')
def logout():
    session.clear()
    return redirect(url_for('shouye'))



def log(func):
    @wraps(func)
    def wrapper(*args,**kwargs):
        if session.get('user'):
            return  func(*args,**kwargs)
        else:
            return render_template('denglu.html')
    return wrapper




@app.route('/neirong',methods=['GET','POST'])
@log
def fankui():
    if request.method=='GET':
        return render_template('fankui.html')
    else:
        title=request.form.get('title')
        detail=request.form.get('detail')
        author_id=User.query.filter(User.username==session.get('user')).first().id
        question=Question(title=title,detail=detail,author_id=author_id)
        db.session.add(question)
        db.session.commit()
        return redirect(url_for('shouye'))


@app.context_processor
def mycontext():
    usern=session.get('user')
    if usern:
        return {'username':usern}
    else:
        return {}



if __name__ == '__main__':
    app.run(debug='True'

fankui.html

<!DOCTYPE html>
<html lang="en">
<head>
    {% extends "text.html" %}
    <meta charset="UTF-8">
    <title>Title</title>
    <link href="https://cdn.bootcss.com/bootstrap/4.0.0-beta/css/bootstrap.css" rel="stylesheet">
</head>
<body>

{% block fankui %}
<form style="margin-top: 10% ; margin-left: 25%;width: 50%" method="POST" {{ url_for('fankui') }}>
    <p style="font-size: 30px">内容发布</p>
<div  >
    <input name="title" class="form-control" type="text" placeholder="请输入标题">
</div>

<div class="form-group" >
    <label for="name"></label>
    <textarea name="detail" class="form-control"  rows="10"  ></textarea>
</div>
<div>
    <button type="submit" class="btn btn-outline-primary">提交</button>
</div>
</form>{% endblock %}

</body>
</html>

实验截图

 

 

 

posted on 2017-11-28 20:33  069王国栋  阅读(93)  评论(0)  编辑  收藏  举报

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