完成评论功能

最新推荐文章于 2025-08-22 19:33:51 发布

转载最新推荐文章于 2025-08-22 19:33:51 发布 · 46 阅读

0 ·

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/acef/p/8006279.html

文章标签：

#前端 #python #数据库 #ViewUI

定义评论的视图函数
@app.route('/comment/',methods=['POST'])
def comment()：
读取前端页面数据，保存到数据库中
用<input type="hidden" 方法获取前端的"question_id"
显示评论次数
要求评论前登录

尝试实现详情页面下的评论列表显示

from flask import Flask,render_template,request,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):
    __table__name = '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'))

class Comment(db.Model):
    __tablename__='comment'
    id=db.Column(db.Integer, primary_key=True, autoincrement=True)
    author_id = db.Column(db.Integer,db.ForeignKey('user.id'))
    question_id = db.Column(db.Integer,db.ForeignKey('question.id'))
    creat_time = db.Column(db.DateTime, default=datetime.now)
    detail=db.Column(db.Text,nullable=False)
    question=db.relationship('Question',backref=db.backref('comments',order_by=creat_time.deac))
    author=db.relationship('User',backref=db.backref('comments'))

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

@app.route('/index/')
def index():
    context = {
            'question':Question.query.all()
        }
    return render_template('index.html',**context)

@app.route('/detail/<question_id>')
def detail(question_id):
    quest = Question.query.filter(Question.id == question_id).first()
    return render_template('detail.html',ques = quest)

@app.route('/comment/',methods=['POST'])
def comment():
     comment = request.form.get('new_comment')
     ques_id = request.form.get('question_id')
     auth_id = User.query.filter(User.username == session.get('user')).first().id
     comm = Comment(author_id=auth_id,question_id=ques_id,detail=comment)
     db.session.add(comm)
     db.session.commit()
     return redirect(url_for('detail',question_id=ques_id))

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



@app.route('/login/',methods=['GET','POST'])
def login():
    if request.method=='GET':
        return render_template('login.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
                return redirect(url_for('index'))
            else:
                return u'password error'
        else:
            return u'username is not existed'


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


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


@app.route('/question/',methods=['GET','POST'])
@loginFirst #需要登录装饰器
def question():
    if request.method=='GET':
        return render_template('question.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('index'))



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


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

{% extends 'base.html' %}

{% block title %}问答详情{% endblock %}

{% block main %}
    <div class="page-header">
            <h3>{{ ques.title }}<br><small>{{ ques.auther.username }} <span class="badge">{{ ques.creat_time }}</span></small></h3>
    </div>

　　<p class="lead">{{ ques.detail }}</p>
    <hr>

    <form action="{{ url_for('comment') }}"method="post"style="...">
        <div class="page-gronp">
            <textarea name="new_comment"class="form-control"rows="3"id="new-comment"placeholder="write your comment"></textarea>
            <input name="question_id" type="hidden" value="{{ ques.id }}"/>
        </div>
        <button type="submit" class="btn bth-defauit">发送</button>
    </form>

    <h4>评论:({{ ques.comments|length }})</h4>

<div class="" style="width:58rem;margin-left: 4%;height: auto;margin-top: 0.5% ">
    {% for foo in ques.comment %}
      <li class="list-group-item">
      <span class="glyphicon glyphicon-heart-empty"aria-hidden="true"></span>
      <a href="#" >{{ foo.author.username }}</a>
      <span class="badge">{{ foo.creat_time }}</span>

      <p style="...">{{ foo.detail }}</p>

      </li>
    {% endfor %}
</div>