수업소개
MySQL의 join을 이용해서 Node.js 웹앱의 글 생성 기능을 구현하는 방법을 살펴보겠습니다.
강의
소스코드
main.js
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 | 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){ db.query('SELECT * FROM author', function(error2, authors){ 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> ${template.authorSelect(authors)} </p> <p> <input type="submit"> </p> </form> `, `<a href="/create">create</a>` ); response.writeHead(200); response.end(html); }); }); } else if(pathname === '/create_process'){ var body = ''; request.on('data', function(data){ body = body + data; }); request.on('end', function(){ var post = qs.parse(body); db.query(` INSERT INTO topic (title, description, created, author_id) VALUES(?, ?, NOW(), ?)`, [post.title, post.description, post.author], function(error, result){ if(error){ throw error; } response.writeHead(302, {Location: `/?id=${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); |
template.js
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | module.exports = { HTML:function(title, list, body, control){ return ` <!doctype html> <html> <head> <title>WEB1 - ${title}</title> <meta charset="utf-8"> </head> <body> <h1><a href="/">WEB</a></h1> ${list} ${control} ${body} </body> </html> `; },list:function(topics){ var list = '<ul>'; var i = 0; while(i < topics.length){ list = list + `<li><a href="/?id=${topics[i].id}">${topics[i].title}</a></li>`; i = i + 1; } list = list+'</ul>'; return list; },authorSelect:function(authors){ var tag = ''; var i = 0; while(i < authors.length){ tag += `<option value="${authors[i].id}">${authors[i].name}</option>`; i++; } return ` <select name="author"> ${tag} </select> ` }} |
