Revert changes to 886627d

app.js

@@ -4,7 +4,7 @@ var express = require('express');
 var path = require('path');
 var cookieParser = require('cookie-parser');
 var bodyParser = require('body-parser');
-var stats = require('./routes/stats');
+var todos = require('./routes/todos');
 var cloud = require('./cloud');
 
 var app = express();
@@ -41,12 +41,8 @@ app.get('/', function(req, res) {
   res.render('index', { currentTime: new Date() });
 });
 
-app.get('/dash', function(req, res) {
-    res.render('dashboard');
-});
-
 // 可以将一类的路由单独保存在一个文件中
-app.use('/stats', stats);
+app.use('/todos', todos);
 
 // 如果任何路由都没匹配到，则认为 404
 // 生成一个异常让后面的 err handler 捕获

cloud.js

@@ -7,81 +7,4 @@ AV.Cloud.define('hello', function(request, response) {
   response.success('Hello world!');
 });
 
-var EchoTime = AV.Object.extend("EchoTime");
-
-AV.Cloud.define('createObjectTimer', function(request, response) {
-    var echo = new EchoTime();
-    echo.set('type', 'createObject');
-    echo.set('description', 'POST classes/EchoTime');
-    echo.set('start', new Date());
-    echo.save(null, {
-        success: function(echo) {
-            echo.set('end', new Date());
-            echo.set('delta', echo.get('end') - echo.get('start'));
-            echo.save();
-            response.success(echo);
-        },
-        error: function(echo, err) {
-            response.error(err);
-        }});
-});
-
-AV.Cloud.define('fileOpsTimer', function(request, response) {
-    // create a file: POST files/{filename}
-    var file   = new AV.File('hello.txt', new Buffer("Hello world!"));
-
-    var startSave = new Date();
-    file.save().then(function(f) {
-        var end  = new Date();
-        var echo = new EchoTime();
-        echo.save({
-            type: 'createFile',
-            description: 'POST files/{filename}',
-            start: startSave,
-            end: end,
-            delta: end - startSave,
-        });
-
-        var startDelete = new Date();
-        f.destroy().then(function() {
-            var end  = new Date();
-            var echo = new EchoTime();
-            echo.save({
-                type: 'deleteFile',
-                description: 'DELETE files/{filename}',
-                start: startDelete,
-                end: end,
-                delta: end - startDelete,
-            });
-            response.success(echo);
-        }, function(err) {
-            response.error(err);
-        });
-
-    }, function(err) {
-        response.error(err);
-    });
-});
-
-AV.Cloud.define('runFunctionTimer', function(request, response) {
-    var start = new Date();
-    AV.Cloud.run('hello', {}, {
-        success: function(result) {
-            var end  = new Date();
-            var echo = new EchoTime();
-            echo.save({
-                type: 'runFunction',
-                description: 'POST functions/hello',
-                start: start,
-                end: end,
-                delta: end - start,
-            });
-            response.success(echo);
-        },
-        error: function(error) {
-            response.error(error);
-        }
-    });
-});
-
 module.exports = AV.Cloud;

routes/todos.js

@@ -0,0 +1,49 @@
+var router = require('express').Router();
+var AV = require('leanengine');
+
+// `AV.Object.extend` 方法一定要放在全局变量，否则会造成堆栈溢出。
+// 详见： https://leancloud.cn/docs/js_guide.html#对象
+var Todo = AV.Object.extend('Todo');
+
+// 查询 Todo 列表
+router.get('/', function(req, res, next) {
+  var query = new AV.Query(Todo);
+  query.descending('createdAt');
+  query.find({
+    success: function(results) {
+      res.render('todos', {
+        title: 'TODO 列表',
+        todos: results
+      });
+    },
+    error: function(err) {
+      if (err.code === 101) {
+        // 该错误的信息为：{ code: 101, message: 'Class or object doesn\'t exists.' }，说明 Todo 数据表还未创建，所以返回空的 Todo 列表。
+        // 具体的错误代码详见：https://leancloud.cn/docs/error_code.html
+        res.render('todos', {
+          title: 'TODO 列表',
+          todos: []
+        });
+      } else {
+        next(err);
+      }
+    }
+  });
+});
+
+// 新增 Todo 项目
+router.post('/', function(req, res, next) {
+  var content = req.body.content;
+  var todo = new Todo();
+  todo.set('content', content);
+  todo.save(null, {
+    success: function(todo) {
+      res.redirect('/todos');
+    },
+    error: function(err) {
+      next(err);
+    }
+  })
+})
+
+module.exports = router;

views/index.ejs

@@ -8,6 +8,6 @@
     <h1>LeanEngine</h1>
     <p>这是 LeanEngine 的示例应用</p>
     <p>当前时间：<%= currentTime %></p>
-    <p>一个示例应用：<a href="/dash">How fast is LeanEngine?</a></p>
+    <p><a href="/todos">一个简单的「TODO 列表」示例</a></p>
   </body>
 </html>

views/todos.ejs

@@ -0,0 +1,19 @@
+<!DOCTYPE HTML>
+<html>
+  <head>
+    <title>Todo</title>
+    <link rel="stylesheet" href="/stylesheets/style.css">
+  </head>
+  <body>
+    <h1><%= title %></h1>
+    <form action="/todos" method="POST">
+      <input type="text" name="content" />
+      <input type="submit" value="新增" />
+    </form>
+    <ul>
+      <% for(var i=0; i<todos.length; i++) {%>
+      <li><%= todos[i].get('content') %></li>
+      <% } %>
+    </ul>
+  </body>
+</html>