发布功能完成

Posted 2020-10-16 李海力

• 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。

 py文件

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


#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.route("/register",methods=[‘GET‘,‘POST‘])
def register():
    if request.method == ‘GET‘:
        return render_template("login.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("login.html")



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

问答

{% extends ‘base.html‘ %}

{% block title %}问答{% endblock %}
{% block head %}
    <link type="text/css" rel="stylesheet" href="{{ url_for(‘static‘,filename=‘css/label.css‘) }}">
    <script src="{{ url_for(‘static‘,filename=‘js/label.js‘) }}"></script>
{% endblock %}

{% block main %}
   <div class="label">
    <h1 style="color:pink",align="center"> 发布问答</h1>
        <div class="q">
            <label for="question">问题</label>
            <textarea id="question" cols="50" rows="1"></textarea>
        </div>
        <div class="form-group">
            <label for="questionDetail">内容</label>
            <textarea class="form-control" id="questionDetail" cols="50" rows="5"></textarea>
        </div>
       <br>
        <div class="input-area">
            <button onclick="fnQuestion">发布问答</button>
        </div>
    </div>
{% endblock %}