输出 JSON 数据而不是视图答案

【问题标题】：JSON data output is ouputted instead of view输出 JSON 数据而不是视图
【发布时间】：2015-05-15 22:14:39
【问题描述】：

我在外部调用了 JSON Api。我已经通过视图在页面上显示了 JSON，但现在想单独输出一些内容，以便它具有良好的可读性，因为整个数组到处都是。我想让它看起来整洁。至今：控制器：

 def index
   content = open("MY_URL").read
   @hash = JSON.parse content
   render @hash
 end

查看：

<% @hash.each do |hash| %>
<%= hash %>
<% end %>

这是页面视图的样子（数组）：

["statement", {"generated"=>"2015-01-11", "due"=>"2015-01-25", "period"=>{"from"=>"2015-01-26", "to"=>"2015-02-25"}}] ["total", 136.03] ["package", {"subscriptions"=>[{"type"=>"tv", "name"=>"Variety with Movies", "cost"=>50.0}, {"type"=>"talk", "name"=>"Talk Anytime", "cost"=>5.0}, {"type"=>"broadband", "name"=>"Fibre Unlimited", "cost"=>16.4}], "total"=>71.4}] ["callCharges", {"calls"=>[{"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"07716393769", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"02074351359", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"02074351359", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"02074351359", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"02074351359", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"02074351359", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"02074351359", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"02074351359", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"02074351359", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"02074351359", "duration"=>"00:23:03", "cost"=>2.13}, {"called"=>"02074351359", "duration"=>"00:23:03", "cost"=>2.13}], "total"=>59.64}] ["Store", {"rentals"=>[{"title"=>"50 Shades of Grey", "cost"=>4.99}], "buyAndKeep"=>[{"title"=>"That's what she said", "cost"=>9.99}, {"title"=>"Broke back mountain", "cost"=>9.99}], "total"=>24.97}] [:prefixes, ["tasks", "application"]] [:template, "index"]

【问题讨论】：

标签： ruby-on-rails json serialization controller

【解决方案1】：

当您将哈希传递给render 时，rails 会将哈希转换为字符串并输出字符串而不是渲染视图。

如果您删除 render 调用：

def index
  content = open("MY_URL").read
  @hash = JSON.parse content
end

Rails 会自动尝试查找app/views/:controller_name/index.html.erb。它将实例变量@hash 传递给视图。

在您看来，您需要做的不仅仅是：

<%= hash %>

这将简单地调用hash.to_s，结果将与您之前的示例一样。 Rails 不是将数据转换为可呈现的 html 的魔杖。如何做到这一点超出了单个 Stackoverflow 问题的范围。

【讨论】：