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

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)

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()

# #增加
# user = User(username='11122233',password = '123123')
# db.session.add(user)
# db.session.commit()
#
# #查询
# user =User.query.filter(User.username =='a123123').first()
# print(user.username,user.password)
#
# #修改
# user =User.query.filter(User.username =='11122233').first()
# user.password='123123aa'
# print(user.username,user.password)
# db.session.commit()
#
# #删除
# user =User.query.filter(User.username =='11122233').first()
# print(user.username,user.password)
# db.session.delete(user)
# db.session.commit()

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

@app.route('/base2')
def base2():
    return render_template('base2.html')

@app.route('/login/',methods=['GET','POST'])
def login():
    if request.method =='GET':
        return  render_template('login.html')
    else:
        usern = request.form.get('username')
        passw = request.form.get('password')
        user = User.query.filter(User.username == usern).first()
        if user:
            if user.password == passw:
                session['user']=usern
                return redirect(url_for("base2"))
            else:
                return u'用户密码错误！'
        else:
            return u'用户不存在！'

@app.route('/res/',methods=['GET','POST'])
def res():
    if request.method =='GET':
        return  render_template('res.html')
    else:
        usern = request.form.get('name')
        passw = request.form.get('password')
        user = User.query.filter(User.username==usern).first()
        if user:
            return 'username existed'
        else:
            user= User(username=usern,password=passw)
            db.session.add(user)
            db.session.commit()
            return redirect(url_for('login'))

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

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


def loginFirst(func): #参数是函数
    @wraps(func)
    def wrapper(*args, ** kwargs): #定义个函数将其返回
        print('call %s():' % func.__name__)
        if session.get('user'):
            return func(*args, ** kwargs)
        else:
            return redirect(('login'))
    return wrapper #返回一个函数


@app.route('/question',methods=['GET','POST'])
@loginFirst
def question():
    if request.method == 'GET':
        return render_template('question.html')
    else:
        title = request.form.get('title')
        author_id = User.query.filter(User.username == session.get('user')).first().id
        question = Question(title = title,detail = detail,author_id = author_id)
        question.author = User
        db.session.add(question) #保存到数据库
        db.session.commit() #提交
        return redirect(url_for('base2')) #跳转

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

{% extends 'base.html' %}
{% block title %}QUESTION{% endblock  %}
{% block head %}
        <link rel="stylesheet" type="text/css" href="{{ url_for('static',filename='../static/css/.css') }}">
{% endblock  %}
{% block main %}
<div class="question-feedback">
<h2> 问题反馈 </h2>
<form action="{{ url_for('return') }}" method="post" >
   <div class="question-control">
       <div>
            <label for="question">问题：</label>
            <br>
            <textarea class="form-control" rows="6" id="questionTitle" placeholder="请输入问题"
                      style="height: 50px" name="title" ></textarea>
        </div>
       <div>
            <label for="questionDetail">详情：</label>
            <br>
            <textarea class="form-control" rows="6" id="questionDetail" placeholder="请描述详细情况"
                      style="height: 130px" name="detail"></textarea>
       </div>
       <input type="checkbox" id="c1">发布问题反馈<br>
   </div>
    <div class="submit-button">
       <br>
       <button type="submit" style="float:right" id="submit-button">提交</button>
    </div>
</form>
</div>
{% endblock  %}