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。

from flask import Flask, render_template, url_for, redirect, request,session
from flask_sqlalchemy import SQLAlchemy
from functools import wraps
import config
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(50))

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()


#db.create_all()

#增加数据
#user=User(username = 'shanshan1',password = '111111')
#db.session.add(user)
#db.session.commit()

#查询数据
#user=User.query.filter(user.username == 'shanshan1').first()
#print(user.id,user.username,user.password)


#修改数据
#user=User.query.filter(user.username == 'shanshan3').first()
#user.password = '0000'
#db.session.commit()

#删除数据
#user=User.query.filter(user.username == 'shanshan3').first()
#db.session.delete(user)
#db.session.commit()


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

@app.route('/login',methods=['GET','POST'])
def login():
    if request.method =='GET':
        return render_template('denglu.html')
    else:
        name = request.form.get('name')
        passw = request.form.get('password')
        user = User.query.filter(User.username == name).first()
    if user:
       if user.password==passw:
           session['user']=name
           return redirect(url_for('manhua'))
       else:
           return "密码错误！"
    else:
        return "用户名不存在！"

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

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



@app.route("/register",methods=['GET','POST'])
def register():
    if request.method == 'GET':
        return render_template("zhuce.html")
    else:
        name = request.form.get('name')
        passw = request.form.get('password')
        user = User.query.filter(User.username == name).first()
    if user:
        return "用户名已存在！"

    else:
        user = User(username=name, password=passw)
        db.session.add(user)
        db.session.commit()
        return render_template("denglu.html")



def loginFirst(func):
    #行动前需要登录，定义装饰器
    @wraps(func)
    def wrapper(*args,**kwargs):
        if session.get('user'):
            return func(*args,**kwargs)
        else:
            return redirect(url_for('login'))
    return wrapper


@app.route('/wenda',methods=['GET','POST'])
@loginFirst
def wenda():
    if request.method=='GET':
        return render_template('wenda.html')
    else:
        title=request.form.get('title')
        detail=request.form.get('fankui')
        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)  # 数据库，添加操作
        db.session.commit()
    return redirect(url_for('manhua'))


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

{% extends'shouye.html' %}
{% block title %}
    wenda
{% endblock %}
{% block head %}
    <link rel="stylesheet" type="text/css" href="../static/css/wenda.css">
   {% endblock %}
{% block main %}
<body>
   <div class="label">
    <h1 style="color:pink", align="center"> 漫画问卷调查</h1>
       <form action="{{ url_for("wenda") }}" method="post">
        <div class="q">
            <label for="question">电影</label>
            <textarea id="question" cols="50" rows="1" name="title"></textarea>
        </div>
        <div class="form-group">
            <label for="questionDetail">反馈</label>
            <textarea class="form-control" id="questionDetail" cols="50" rows="5" name="fankui"></textarea>
        </div>
       <br>
        <div class="input-area">
            <button onclick="fnQuestion">发布</button>
        </div>
       </form>
   </div>
{% endblock %}
</body>