Web Programming examples

Google Maps,AngularJS

Ruby on Rails Tutorial AngularJS $resource, server-side data

1)Rails model, migration, test data

1.Rails model

$ rails generate model User name:string email:string

2.migration

$ rake db:migrate

3.test data

$ rails c

User.create(name: "testuser1", email: "test1@example.com")
User.create(name: "testuser2", email: "test2@example.com")
User.create(name: "testuser3", email: "test3@example.com")

2)Rails controller

1.generate controller

$ rails generate controller Users

2.index action

$ vi app/controllers/users_controller.rb

  def index
    @users = User.all
    render json: @users
  end

3)Rails resource route

$ vi config/routes.rb

  scope '/app' do
    resources :users
  end

4)AngularJS $resource

1.angular-resource include

$ vi app/assets/javascripts/application.js

//= require angular-resource

2.ngResource DI

$ vi app/assets/javascripts/mymodule.js.erb

myModule = angular.module('myModule', ['ui.bootstrap','ngRoute','ngResource']);

5)AngularJS route

1.confirm Rails route

$ rake routes
users GET    /app/users(.:format)           users#index

2.AngularJS route

$ vi app/assets/javascripts/mymodule.js.erb

 .when("/users", {
  templateUrl: "<%= asset_path('users/index.html.erb') %>"
  })

6)AngularJS user index controller

$ vi app/assets/javascripts/mymodule.js.erb

myModule.controller("UsersIndexCtrl", function($scope,$resource) {
  var rtn = $resource('/app/users');
  $scope.users = rtn.query();
});

7)AngularJS index template view

$ vi app/assets/templates/users/index.html.erb

<div ng-controller="UsersIndexCtrl">
<h1>index</h1>
<table class="table table-bordered">
  <thead>
    <td>name</td>
    <td>email</td>
  </thead>
  <tbody>
    <tr ng-repeat="user in users">
      <td>
        {{user.name}}
      </td>
      <td>
        {{user.email}}
      </td>
    </tr>
  </tbody>
</table>
</div>

8)add link to user index

$ vi app/views/layouts/_header.html.erb

<li><%= link_to "Index", "/users" %></li>

9)Rails route

*Problem

1."http://localhost:3000/users"
2.browser reload
3."No route" error

*Avoidance

$ vi config/routes.rb

get 'users', to: 'layouts#index'