在轨道上的"每个"Ruby 中显示其他数据

Question

我有一个显示相册和用户的应用程序

我目前正在输出专辑，

<main role="main" class="flex-shrink-0">
<div class="container">
<h1 class="mt-5">Albums</h1>
<p class="lead">Here we show all albums and it's details</p>
<div class="row">
<% @albums.each do |album| %>
<div class="col-md-4">
<%# image_tag(@albumImage ['thumbnailUrl']) %>
<h5 class="card-title">
<%= album['title'] %>
</h5>
<p>By: <%= album['userId'] %><p>
<%= link_to "View Album", album_path(album['id']), class: "btn btn-primary" %>
</div>
<% end %>
</div>
</div>
<%= will_paginate @albums, renderer: WillPaginate::ActionView::BootstrapLinkRenderer, class: 'margin-auto' %>
</main>

但是我想获取用户，以便我可以显示相册创建者的名称，目前，我正在显示相册用户ID

<p>By: <%= album['userId'] %><p>

理想情况下，我想做这样的事情

<p>By: <%= album.user['name'] %><p>

所有数据都来自外部API，在我拥有的控制器中

require 'will_paginate/array'
class AlbumsController < ApplicationController
def index
@albums = HTTParty.get('https://jsonplaceholder.typicode.com/albums', :headers => {'Content-Type' => 'application/json'}).paginate(:page => params[:page], :per_page => 10)
@user = HTTParty.get('https://jsonplaceholder.typicode.com/users', :headers => {'Content-Type' => 'application/json'})
end
end

不知道如何最好地解决这个问题。

Answer 1

> 首先，我假设@user实际上是users的array。如果这是真的，你可能想做：

require 'will_paginate/array'
class AlbumsController < ApplicationController
def index
@albums = HTTParty.get('https://jsonplaceholder.typicode.com/albums', :headers => {'Content-Type' => 'application/json'}).paginate(:page => params[:page], :per_page => 10)
@users = HTTParty.get('https://jsonplaceholder.typicode.com/users', :headers => {'Content-Type' => 'application/json'})
end
end

然后，您应该能够执行以下操作：

<main role="main" class="flex-shrink-0">
<div class="container">
<h1 class="mt-5">Albums</h1>
<p class="lead">Here we show all albums and it's details</p>
<div class="row">
<% @albums.each do |album| %>
<div class="col-md-4">
<%# image_tag(@albumImage ['thumbnailUrl']) %>
<h5 class="card-title">
<%= album['title'] %>
</h5>
<p>By: <%= @users.find{|u| u['id'] == album['userId']}.try(:[],'name') || 'not available' %><p>
<%= link_to "View Album", album_path(album['id']), class: "btn btn-primary" %>
</div>
<% end %>
</div>
</div>
<%= will_paginate @albums, renderer: WillPaginate::ActionView::BootstrapLinkRenderer, class: 'margin-auto' %>
</main>

这：

@users.find{|u| u['id'] == album['userId']}

。将迭代@users数组并找到具有与album['userId']匹配id的user。

这：

.try(:[],'name')

。将尝试从找到的user获取name属性，但如果未找到user，则不会引发和错误。

而这个：

|| 'not available'

。如果user没有name或找不到user，将显示"不可用"。