MySQL join을 이용해서 상세보기 구현

수업소개

MySQL의 JOIN을 이용해서 Node.js 웹앱의 상세보기 기능을 구현하는 방법을 알아보겠습니다. 

 

 

 

강의

 

 

 

소스코드

main.js (변경사항)

var http = require('http');
var fs = require('fs');
var url = require('url');
var qs = require('querystring');
var template = require('./lib/template.js');
var path = require('path');
var sanitizeHtml = require('sanitize-html');
var mysql = require('mysql');
var db = mysql.createConnection({
  host:'localhost',
  user:'root',
  password:'111111',
  database:'opentutorials'
});
db.connect();


var app = http.createServer(function(request,response){
    var _url = request.url;
    var queryData = url.parse(_url, true).query;
    var pathname = url.parse(_url, true).pathname;
    if(pathname === '/'){
      if(queryData.id === undefined){
        db.query(`SELECT * FROM topic`, function(error,topics){
          var title = 'Welcome';
          var description = 'Hello, Node.js';
          var list = template.list(topics);
          var html = template.HTML(title, list,
            `<h2>${title}</h2>${description}`,
            `<a href="/create">create</a>`
          );
          response.writeHead(200);
          response.end(html);
        });
      } else {
        db.query(`SELECT * FROM topic`, function(error,topics){
         if(error){
           throw error;
         }
         db.query(`SELECT * FROM topic LEFT JOIN author ON topic.author_id=author.id WHERE topic.id=?`,[queryData.id], function(error2, topic){
           if(error2){
             throw error2;
           }
           console.log(topic);
          var title = topic[0].title;
          var description = topic[0].description;
          var list = template.list(topics);
          var html = template.HTML(title, list,
            `
            <h2>${title}</h2>
            ${description}
            <p>by ${topic[0].name}</p>
            `,
            ` <a href="/create">create</a>
                <a href="/update?id=${queryData.id}">update</a>
                <form action="delete_process" method="post">
                  <input type="hidden" name="id" value="${queryData.id}">
                  <input type="submit" value="delete">
                </form>`
          );
          response.writeHead(200);
          response.end(html);
         })
      });
      }
    } else if(pathname === '/create'){
      db.query(`SELECT * FROM topic`, function(error,topics){
        var title = 'Create';
        var list = template.list(topics);
        var html = template.HTML(title, list,
          `
          <form action="/create_process" method="post">
            <p><input type="text" name="title" placeholder="title"></p>
            <p>
              <textarea name="description" placeholder="description"></textarea>
            </p>
            <p>
              <input type="submit">
            </p>
          </form>
          `,
          `<a href="/create">create</a>`
        );
        response.writeHead(200);
        response.end(html);
      });
    } else if(pathname === '/create_process'){
      var body = '';
      request.on('data', function(data){
          body = body + data;
      });
      request.on('end', function(){
          var post = qs.parse(body);
          db.query(`
            INSERT INTO topic (title, description, created, author_id) 
              VALUES(?, ?, NOW(), ?)`,
            [post.title, post.description, 1], 
            function(error, result){
              if(error){
                throw error;
              }
              response.writeHead(302, {Location: `/?id=${result.insertId}`});
              response.end();
            }
          )
      });
    } else if(pathname === '/update'){
      db.query('SELECT * FROM topic', function(error, topics){
        if(error){
          throw error;
        }
        db.query(`SELECT * FROM topic WHERE id=?`,[queryData.id], function(error2, topic){
          if(error2){
            throw error2;
          }
          var list = template.list(topics);
          var html = template.HTML(topic[0].title, list,
            `
            <form action="/update_process" method="post">
              <input type="hidden" name="id" value="${topic[0].id}">
              <p><input type="text" name="title" placeholder="title" value="${topic[0].title}"></p>
              <p>
                <textarea name="description" placeholder="description">${topic[0].description}</textarea>
              </p>
              <p>
                <input type="submit">
              </p>
            </form>
            `,
            `<a href="/create">create</a> <a href="/update?id=${topic[0].id}">update</a>`
          );
          response.writeHead(200);
          response.end(html);
        });
      });
    } else if(pathname === '/update_process'){
      var body = '';
      request.on('data', function(data){
          body = body + data;
      });
      request.on('end', function(){
          var post = qs.parse(body);
          db.query('UPDATE topic SET title=?, description=?, author_id=1 WHERE id=?', [post.title, post.description, post.id], function(error, result){
            response.writeHead(302, {Location: `/?id=${post.id}`});
            response.end();
          })
      });
    } else if(pathname === '/delete_process'){
      var body = '';
      request.on('data', function(data){
          body = body + data;
      });
      request.on('end', function(){
          var post = qs.parse(body);
          db.query('DELETE FROM topic WHERE id = ?', [post.id], function(error, result){
            if(error){
              throw error;
            }
            response.writeHead(302, {Location: `/`});
            response.end();
          });
      });
    } else {
      response.writeHead(404);
      response.end('Not found');
    }
});
app.listen(3000);