[MEAN Stack] First API -- 3. Select by ID with Mongoose and Express-优快云博客

本文介绍如何利用Node.js的Mongoose库从MongoDB中选择资源并构建RESTful API，同时展示了Angular如何消费该API来展示数据。通过具体代码示例，读者可以了解前后端分离开发的基本流程。

Mongoose allows you to easily select resources by ID from your MongoDB. This is an important aspect to creating an API.

Server.js

'use strict';

var expres = require('express');
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/simple');
var cors = require("cors");

var personSchema = {
    firstName:String,
    lastName:String,
    email:String
};

//create a person model, and rename db as people
var Person = mongoose.model('Person', personSchema);
var app = expres();
app.use(cors());

app.get('/people', function(request, response){
    Person.find().select("firstName").exec(function(err, data) {
        response.json(200, data);
    })
});

app.get('/people/:id', function(request, response){
    Person.findById(request.params.id, function(err, data) {
       response.send(data);
    });
});

app.listen(3000);

app.js:

/**
 * Created by Answer1215 on 12/9/2014.
 */
'use strict';

function MainCtrl(PeopleService) {
    var vm = this;
    vm.people = [];
    vm.selectedPerson = {};
    
    vm.getPeople = PeopleService.getPeople().then(function(response) {
        vm.people = response.data;
    });

    vm.selectPerson = function(person) {
        PeopleService.getSelectedPerson(person).then(function(response) {
            vm.selectedPerson = response.data;
            vm.selectedPerson.fullName = response.data.firstName + " " + response.data.lastName;
        });

    }
}

function PeopleService($http) {

    var PeopleService = {};
    PeopleService.getPeople = function() {
         return $http.get('http://localhost:3000/people');
    }

    PeopleService.getSelectedPerson = function(person) {
        return $http.get('http://localhost:3000/people/'+person._id);
    }

    return PeopleService;
}

angular.module('app',[])
    .controller('MainCtrl', MainCtrl)
    .service('PeopleService', PeopleService);

index.html

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <link rel="stylesheet" href="bower_components/bootstrap/dist/css/bootstrap.min.css"/>
</head>
<body ng-app="app">

<div class="row" ng-controller="MainCtrl as vm">
    <div class="col-xs-4">
        <ul>
            <li ng-repeat="person in vm.people" ng-click="vm.selectPerson(person)">{{person.firstName}}</li>
        </ul>
    </div>
    <div class="col-xs-6">
        <h2>{{vm.selectedPerson.fullName}}</h2>
        <span>{{vm.selectedPerson.email}}</span>
    </div>
</div>
    <script src="bower_components/angular/angular.min.js"></script>
    <script src="app.js"></script>
</body>
</html>