发布功能完成。

Posted 2020-10-15 琦sq

• 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。

反馈html：

{% extends \'dh.html\' %}
{% block title %}
   反馈页面
{% endblock  %}
{% block head %}
        <link rel="stylesheet" type="text/css" href="{{ url_for(\'static\',filename=\'../static/css/fk.css\') }}">
{% endblock  %}
{% block main %}
<div class="question-feedback">
<h2> 问题反馈 </h2>
<form action="{{ url_for(\'fk\') }}" 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  %}

主py文件：

from flask import Flask,request,render_template,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=TabError,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=\'123456\',password = \'456789\')
# db.session.add(user)
# db.session.commit()
#
# #查询
# user =User.query.filter(User.username ==\'abcdef\').first()
# print(user.username,user.password)
#
# #修改
# user =User.query.filter(User.username ==\'123456\').first()
# user.password=\'abcdef\'
# print(user.username,user.password)
# db.session.commit()
#
# #删除
# user =User.query.filter(User.username ==\'123456\').first()
# print(user.username,user.password)
# db.session.delete(user)
# db.session.commit()

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

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


@app.route(\'/dl/\',methods=[\'GET\',\'POST\'])
def dl():
    if request.method == \'GET\':
        return render_template("dl.html")
    else:
        usern = request.form.get(\'name\')
        password = request.form.get(\'password\')
        user = User.query.filter(User.username == usern).first()
        if user:
            if user.password == password:
                session[\'user\'] = usern
                return redirect(url_for(\'dh\'))
            else:
                return \'密码错误(〃＞皿＜)\'
        else:
            return \'用户不存在┌(。Д。)┐\'

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

@app.route(\'/zc/\',methods=[\'GET\',\'POST\'])
def zc():
    if request.method == \'GET\':
        return render_template("zc.html")
    else:
        usern = request.form.get(\'name\')
        password = request.form.get(\'password\')
        user = User.query.filter(User.username == usern).first()
        if user:
            return \'用户名已存在┗|*｀0′*|┛ \'
        else:
            user1 = User(username=usern, password=password)
            db.session.add(user1)
            db.session.commit()
            return redirect(url_for(\'dl\'))

@app.route(\'/tc/\')
def tc():
    session.clear();
    return redirect(url_for(\'sy\'))

def loginFirst(func):
    @wraps(func)
    def wrapper(*args,**kwargs):
        if session.get(\'user\'):
            return func(*args,**kwargs)
        else:
            return redirect(url_for(\'dl\'))
    return wrapper

@app.route(\'/fk/\',methods=[\'GET\',\'POST\'])
@loginFirst
def fk():
    if request.method == \'GET\':
        return render_template(\'fk.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(\'sy\'))


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