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idea 创建todo
Today we will be creating a very simple Todo application using the MEAN (Mongo, Express, Angular, Node) stack. We will be creating:
今天，我们将使用MEAN（Mongo，Express，Angular，Node）堆栈创建一个非常简单的Todo应用程序。 我们将创建：
- Single page application to create and finish todos 单页应用程序来创建和完成待办事项
- Storing todos in a MongoDB using Mongoose 使用Mongoose将待办事项存储在MongoDB中
- Using the Express framework 使用Express框架
- Creating a RESTful Node API 创建一个RESTful Node API
- Using Angular for the frontend and to access the API 使用Angular作为前端并访问API
While the application is simple and beginner to intermediate level in its own right, the concepts here can apply to much more advanced apps. The biggest things we should focus on is using Node as an API and Angular as the frontend. Making them work together can be a bit confusing so this tutorial should help alleviate some confusion. Buckle those seatbelts; this could be a long one.
尽管该应用程序简单易行，并且具有初学者到中级的水平，但是此处的概念可以应用于更高级的应用程序。 我们应该重点关注的最大事情是使用Node作为API，使用Angular作为前端。 使它们协同工作可能会有些混乱，因此本教程应有助于减轻一些混乱。 扣紧那些安全带； 这可能会很长。
我们将要建设的 (What We'll Be Building)
基本设置 (Base Setup)
档案结构 (File Structure)
We are going to keep the file structure very simple and put most of the code for our Node application into the server.js file. In larger applications, this should be broken down further to separate duties. is a good boilerplate to see best practices and how to separate file structure. Let's go ahead and create our simpler file structure and edit the files as we go along.
我们将使文件结构非常简单，并将Node应用程序的大部分代码放入server.js文件中。 在较大的应用程序中，应将其进一步分解为单独的职责。 是查看最佳实践以及如何分隔文件结构的好样板。 让我们继续创建更简单的文件结构，并在进行过程中编辑文件。
- public ----- core.js ----- index.html - package.json - server.js
安装模块 (Installing Modules)
In Node, the package.json file holds the configuration for our app. Node's package manager (npm) will use this to install any dependencies or modules that we are going to use. In our case, we will be using (popular Node framework) and (object modeling for MongoDB).
在Node中， package.json文件保存了我们应用程序的配置。 Node的程序包管理器（npm）将使用它来安装我们将要使用的所有依赖项或模块。 在我们的案例中，我们将使用 （流行的Node框架）和 （用于MongoDB的对象建模）。
{ "name" : "node-todo", "version" : "0.0.0", "description" : "Simple todo application.", "main" : "server.js", "author" : "Scotch", "dependencies" : { "express" : "~4.7.2", "mongoose" : "~3.6.2", "morgan" : "~1.2.2", "body-parser": "~1.5.2", "method-override": "~2.1.2" }} Now if we run npm install, npm will look at this file and install Express and Mongoose.
现在，如果我们运行npm install ，npm将查看该文件并安装Express和Mongoose。
节点配置 (Node Configuration)
In our package.json file, we told it that our main file would be server.js. This is the main file for our Node app and where we will configure the entire application.
在package.json文件中，我们告诉我们主文件将是server.js 。 这是Node应用程序的主文件，我们将在其中配置整个应用程序。
This is the file where we will:
这是我们将要执行的文件：
- Configure our application 配置我们的应用程序
- Connect to our database 连接到我们的数据库
- Create our Mongoose models 创建我们的猫鼬模型
- Define routes for our RESTful API 为我们的RESTful API定义路由
- Define routes for our frontend Angular application 为我们的前端Angular应用程序定义路由
- Set the app to listen on a port so we can view it in our browser 将应用程序设置为侦听端口，以便我们可以在浏览器中查看它
For now, we will just configure the app for Express, our MongoDB database, and listening on a port.
现在，我们仅将应用程序配置为Express，我们的MongoDB数据库并在端口上侦听。
// server.js // set up ======================== var express = require('express'); var app = express(); // create our app w/ express var mongoose = require('mongoose'); // mongoose for mongodb var morgan = require('morgan'); // log requests to the console (express4) var bodyParser = require('body-parser'); // pull information from HTML POST (express4) var methodOverride = require('method-override'); // simulate DELETE and PUT (express4) // configuration ================= mongoose.connect('mongodb://node:nodeuser@mongo.onmodulus.net:27017/uwO3mypu'); // connect to mongoDB database on modulus.io app.use(express.static(__dirname + '/public')); // set the static files location /public/img will be /img for users app.use(morgan('dev')); // log every request to the console app.use(bodyParser.urlencoded({'extended':'true'})); // parse application/x-www-form-urlencoded app.use(bodyParser.json()); // parse application/json app.use(bodyParser.json({ type: 'application/vnd.api+json' })); // parse application/vnd.api+json as json app.use(methodOverride()); // listen (start app with node server.js) ====================================== app.listen(8080); console.log("App listening on port 8080"); Just with that bit of code, we now have an HTTP server courtesy of Node. We have also created an app with Express and now have access to many benefits of it. In our app.configure section, we are using express modules to add more functionality to our application.
仅需少量的代码，我们现在就拥有一个由Node提供的HTTP服务器。 我们还使用Express创建了一个应用程序，现在可以使用它的许多好处。 在我们的app.configure部分中，我们使用快速模块向我们的应用程序添加更多功能。
数据库设置 (Database Setup)
We will be using a remote database hosted on . They provide a great service and give you $15 upfront to use as you see fit. This is great for doing testing and creating databases on the fly.
我们将使用托管的远程数据库。 他们提供优质的服务，并给您15美元的预付款，以供您酌情使用。 这非常适合即时进行测试和创建数据库。
Modulus will provide the database URL you need and you can use mongoose.connect to connect to it. That's it.
Modulus将提供您所需的数据库URL，您可以使用mongoose.connect进行连接。 而已。
启动您的应用程序！ (Start Your App!)
Now that we have our package.json and server.js started up, we can start up our server and see what's going on. Just go into your console and use the following command:
现在我们已经启动了package.json和server.js ，我们可以启动服务器，看看发生了什么。 只需进入控制台并使用以下命令：
node server.js Now you have a server listening on port 8080. You can't see anything in your browser at http://localhost:8080 yet since we didn't configure our application to output anything. But it's a start!
node server.js现在，您有一个服务器正在侦听端口8080。由于我们没有将应用程序配置为输出任何内容，因此您无法在浏览器中的http：// localhost：8080看到任何内容。 但这是一个开始！
npm install -g nodemon. Start your server with nodemon server.js now. Smooth sailing from there. npm install -g nodemon 。 立即使用 nodemon server.js启动服务器。 从那里航行顺畅。 申请流程 (Application Flow)
Now a brief overview of how all our moving parts will work together. There are a lot of different ideas and technologies involved in this application that it is easy to get mixed up with them all. In our diagram below, we explain a bit of the separation of tasks and how the parts tie in together.
现在简要概述一下我们所有的运动部件将如何协同工作。 此应用程序涉及许多不同的思想和技术，很容易将它们混淆在一起。 在下面的图表中，我们解释了一些任务分离以及各部分如何结合在一起。
Angular is on its own in the frontend. It accesses all the data it needs through the Node API. Node hits the database and returns JSON information to Angular based on the RESTful routing.
Angular在前端是独立的。 它通过Node API访问所需的所有数据。 节点访问数据库，并基于RESTful路由将JSON信息返回到Angular。
This way, you can separate the frontend application from the actual API. If you want to extend the API, you can always build more routes and functions into it without affecting the frontend Angular application. This way you can eventually build different apps on different platforms since you just have to hit the API.
这样，您可以将前端应用程序与实际的API分开。 如果要扩展API，则始终可以在其中构建更多路由和功能，而不会影响前端Angular应用程序。 这样，您最终可以在不同的平台上构建不同的应用程序，因为您只需要点击API。
创建我们的节点API (Creating Our Node API)
Before we get to the frontend application, we need to create our RESTful API. This will allow us to have an api that will get all todos, create a todo, and complete and delete a todo. It will return all this information in JSON format.
在进入前端应用程序之前，我们需要创建我们的RESTful API。 这将使我们拥有一个将获取所有 待办事项 ， 创建待办事项以及完成并删除待办事项的api。 它将以JSON格式返回所有这些信息。
待办事项模型 (Todo Model)
We must define our model for our Todos. We'll keep this simple. After the configuration section and before the listen section, we'll add our model.
我们必须为Todos定义模型。 我们将保持简单。 在配置部分之后和侦听部分之前，我们将添加模型。
// define model ================= var Todo = mongoose.model('Todo', { text : String }); That is all we want. Just the text for the todo. MongoDB will automatically generate an _id for each todo that we create also.
那就是我们想要的。 只是待办事项的文字。 MongoDB将为我们创建的每个待办事项自动生成一个_id 。
RESTful API路由 (RESTful API Routes)
Let's generate our Express routes to handle our API calls.
让我们生成Express路由来处理API调用。
// server.js...// routes ====================================================================== // api --------------------------------------------------------------------- // get all todos app.get('/api/todos', function(req, res) { // use mongoose to get all todos in the database Todo.find(function(err, todos) { // if there is an error retrieving, send the error. nothing after res.send(err) will execute if (err) res.send(err) res.json(todos); // return all todos in JSON format }); }); // create todo and send back all todos after creation app.post('/api/todos', function(req, res) { // create a todo, information comes from AJAX request from Angular Todo.create({ text : req.body.text, done : false }, function(err, todo) { if (err) res.send(err); // get and return all the todos after you create another Todo.find(function(err, todos) { if (err) res.send(err) res.json(todos); }); }); }); // delete a todo app.delete('/api/todos/:todo_id', function(req, res) { Todo.remove({ _id : req.params.todo_id }, function(err, todo) { if (err) res.send(err); // get and return all the todos after you create another Todo.find(function(err, todos) { if (err) res.send(err) res.json(todos); }); }); });... Based on these routes, we've built a table to explain how a frontend application should request data from the API.
基于这些路由，我们构建了一个表来解释前端应用程序应如何从API请求数据。
| HTTP Verb | URL | Description |
| GET | /api/todos | Get all of the todos |
| POST | /api/todos | Create a single todo |
| DELETE | /api/todos/:todo_id | Delete a single todo |
| HTTP动词 | 网址 | 描述 |
| 得到 | / api / todos | 获取所有待办事项 |
| 开机自检 | / api / todos | 创建一个待办事项 |
| 删除 | / api / todos /：todo_id | 删除一个待办事项 |
Inside of each of our API routes, we use the Mongoose actions to help us interact with our database. We created our Model earlier with var Todo = mongoose.model and now we can use that to find, create, and remove. There are many more things you can do and I would suggest looking at the official to learn more.
在我们的每个API路由中，我们使用Mongoose操作来帮助我们与数据库进行交互。 我们之前使用var Todo = mongoose.model创建了模型，现在可以使用它来查找 ， 创建和删除 。 您还可以做更多的事情，我建议您看一下官方以了解更多信息。
Our API is done! Rejoice! If you start up your application, you can interact with it at localhost:8080/api/todos to get all the todos. There won't be anything currently since you haven't added any.
我们的API已完成！ 麾！ 如果启动应用程序，则可以在localhost:8080/api/todos与之交互以获取所有待办事项。 由于您尚未添加任何内容，因此目前没有任何内容。
Angular的前端应用程序 (Frontend Application with Angular)
We have created a Node application, configured our database, generated our API routes, and started a server. So much already done and still a little bit longer to go!
我们已经创建了Node应用程序 ， 配置了数据库 ， 生成了API路由 ，并启动了服务器 。 已经完成了很多工作，还有很长的路要走！
The work that we've done so far can stand on its own as an application. It can be an API we use let applications and users connect with our content.
到目前为止，我们所做的工作可以作为应用程序独立存在。 它可以是我们用来让应用程序和用户与我们的内容连接的API。
We want to be the first to use our brand new API that we've just created. This is one of my favorite terms that I learned about last month: We will be . We could treat this as we are our very first client to use our new API. We are going to keep this simple so we'll have just our index.html and core.js to define our frontend.
我们希望成为第一个使用我们刚刚创建的全新API的人。 这是我上个月了解到的我最喜欢的术语之一：我们将成为 。 我们可以将其视为第一位使用新API的客户端。 我们将使其保持简单，以便仅使用index.html和core.js定义前端。
定义前端路由 (Defining Frontend Route)
We have already defined our API routes. Our application's API is accessible from /api/todos, but what about our frontend? How do we display the index.html file at our home page?
我们已经定义了API路由。 我们的应用程序的API可从/api/todos访问，但是我们的前端呢？ 我们如何在主页上显示index.html文件？
We will add one route to our server.js file for the frontend application. This is all we need to do since Angular will be making a single page application and handle the routing.
我们将为前端应用程序向我们的server.js文件添加一条路由。 这是我们需要做的所有事情，因为Angular将制作一个单页应用程序并处理路由。
After our API routes, and before the app.listen, add this route:
在我们的API路由之后，在app.listen之前，添加以下路由：
// server.js... // application ------------------------------------------------------------- app.get('*', function(req, res) { res.sendfile('./public/index.html'); // load the single view file (angular will handle the page changes on the front-end) });... This will load our single index.html file when we hit localhost:8080.
当我们点击localhost:8080时，这将加载我们的单个index.html文件。
设置Angular core.js (Setting Up Angular core.js)
Let's go through our Angular setup first. We have to create a module, create a controller, and define functions to handle todos. Then we can apply to view.
让我们首先进行Angular设置。 我们必须创建一个模块 ， 创建一个控制器 ，并定义函数来处理待办事项 。 然后我们可以申请查看 。
// public/core.jsvar scotchTodo = angular.module('scotchTodo', []);function mainController($scope, $http) { $scope.formData = {}; // when landing on the page, get all todos and show them $http.get('/api/todos') .success(function(data) { $scope.todos = data; console.log(data); }) .error(function(data) { console.log('Error: ' + data); }); // when submitting the add form, send the text to the node API $scope.createTodo = function() { $http.post('/api/todos', $scope.formData) .success(function(data) { $scope.formData = {}; // clear the form so our user is ready to enter another $scope.todos = data; console.log(data); }) .error(function(data) { console.log('Error: ' + data); }); }; // delete a todo after checking it $scope.deleteTodo = function(id) { $http.delete('/api/todos/' + id) .success(function(data) { $scope.todos = data; console.log(data); }) .error(function(data) { console.log('Error: ' + data); }); };} We create our Angular module (scotchApp) and controller (mainController).
我们创建了Angular模块（ scotchApp ）和控制器（ mainController ）。
We also create our functions to get all todos, create a todo, and delete a todo. All these will be hitting the API we just created. On page load, we will GET /api/todos and bind the JSON we receive from the API to $scope.todos. We will then loop over these in our view to make our todos.
我们还创建函数以获取所有 待办事项 ， 创建待办事项和删除待办事项 。 所有这些都会影响我们刚刚创建的API。 在页面加载时，我们将GET /api/todos并将从API收到的JSON绑定到$scope.todos 。 然后，我们将循环查看这些内容以完成待办事项。
We'll follow a similar pattern for creating and deleting. Run our action, remake our todos list.
我们将遵循类似的创建和删除模式。 运行我们的动作，重新制作待办事项列表。
前端视图index.html (Frontend View index.html)
Here we will keep it simple. This is the HTML needed to interact with Angular. We will:
在这里，我们将使其保持简单。 这是与Angular交互所需HTML。 我们会：
- Assign Angular module and controller 分配Angular模块和控制器
- Initialize the page by getting all todos 通过获取所有待办事项来初始化页面
- Loop over the todos 循环待办事项
- Have a form to create todos 有创建待办事项的表格
- Delete todos when they are checked 检查待办事项时删除待办事项
Node/Angular Todo App I'm a Todo-aholic { { todos.length }}
Take a look at what we have.
看看我们有什么。
结论 (Conclusion)
Now we have a fully working application that will show, create, and delete todos all via API (that we built!). That was quite a day. We've done so much. Just an overview of what we've accomplished:
现在，我们有了一个可以正常运行的应用程序，它将通过API（我们自己构建的）显示，创建和删除待办事项。 那真是一天。 我们做了很多。 只是我们已完成的工作的概述：
- RESTful Node API using Express 使用Express的RESTful Node API
- MongoDB interaction using mongoose 使用猫鼬的MongoDB交互
- Angular AJAX $http calls Angular AJAX $ http调用
- Single page application w/ no refreshes 单页应用程序，无刷新
- Dogfooding (sorry, I really like that word) 狗食（对不起，我真的很喜欢这个词）
测试应用 (Test the Application)
Go ahead and download the code on and tweak it or test it. To get it all up and running:
继续并在上下载代码并对其进行调整或测试。 要使其全部正常运行：
- Make sure you have installed 确保已安装
- Clone the repo:
git clone git@github.com:scotch-io/node-todo克隆仓库：git clone git@github.com:scotch-io/node-todo - Install the application:
npm install安装应用程序：npm install - Start the server:
node server.js启动服务器：node server.js - View in your browser at
http://localhost:8080在浏览器中查看位于http://localhost:8080
I hope this was insightful on how to have lots of moving parts work together. In the future, we will look at separating our server.js file since that got a little crazy.
我希望这对如何使许多活动部件协同工作很有见地。 将来，我们将着眼于分离server.js文件，因为这样做有点疯狂。
进一步阅读如果您对更多MEAN堆栈应用程序感兴趣，我们编写了指南，以帮助您开始构建自己的MEAN堆栈基础。 (Further Reading If you are interested in more MEAN stack applications, we've written up a guide to get you started in building your own MEAN stack foundation.)
- Creating a Single Page To-do App with Node and Angular 使用节点和角度创建单页待办事项应用程序
翻译自:
idea 创建todo
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