我在显示来自 api 的 json 响应中的所有值时遇到了一点问题，尤其是在 rullings 部分，其中一些值在数组中并且其中有数组。

我在显示数据方面取得了一些成功，但在数组方面我遇到了困难
我搜索了许多相关问题，但许多问题似乎都集中在生成应该显示的 json

以下是我到目前为止所做的，希望我能理解:

Controller :

class MtgController < ApplicationController 
  require 'net/http' 
  require 'json' 
 
  layout 'admin' 
 
  def index 
    @message = "Mtg Api" 
 
    if params[:search].present? 
      url = 'https://api.magicthegathering.io/v1/cards?name='+ params[:search] 
      uri = URI(url) 
      responce= Net::HTTP.get(uri) 
      @json = JSON.parse(responce) 
    end 
  end 
end 

查看

<% @page_title = "Magic the Gathering" %> 
 
<h1>Magic the Gathering</h1> 
 
<div class="search"> 
  <%= form_tag(mtg_index_path, :method => :post) do %> 
  <table> 
    <tr> 
      <td><%= label_tag(:search) %></td> 
      <td><%= text_field_tag(:search, params[:search]) %></td> 
    </tr> 
      <td>&nbsp;</td> 
      <td><%= submit_tag("search") %></td> 
    </tr> 
  </table> 
  <% end %> 
  <% 
  if params[:search].present? 
    @json["cards"].each do |json| 
  %> 
  <p> 
    Name <%= json['name'] %><br> 
    manaCost <%= json['manaCost'] %><br> 
    cmc <%= json['cmc'] %><br> 
    colors <%= json['colors'] %><br> 
    colorIdentity <%= json['colorIdentity'] %><br> 
    type <%= json['type'] %><br> 
    types <%= json['types'] %><br> 
    subtypes <%= json['subtypes'] %><br> 
    rarity <%= json['rarity'] %><br> 
    set <%= json['set'] %><br> 
    setName <%= json['setName'] %><br> 
    text <%= json['text'] %><br> 
    artist <%= json['artist'] %><br> 
    power <%= json['power'] %><br> 
    toughness <%= json['toughness'] %><br> 
    layout <%= json['layout'] %><br> 
    multiverseid <%= json['multiverseid'] %><br> 
    imageUrl <%= json['imageUrl'] %><br> 
    originalText <%= json['originalText'] %><br> 
    rulings: <br> 
    <%= json['rulings'] %><br> 
 
    <% json['legalities'].each do |play|%> 
      legality <%= play['format'] %> <%= play['legality'] %><br> 
    <% end %> 
 
    id <%= json['id'] %><br> 
  </p> 
  <% end %> 
  <% end %> 
</div> 

Json 响应:

{"cards":[ 
{ 
"name":"Ball Lightning", 
"manaCost":"{R}{R}{R}", 
"cmc":3, 
"colors":["Red"], 
"colorIdentity":["R"], 
"type":"Creature — Elemental", 
"types":["Creature"], 
"subtypes":["Elemental"], 
"rarity":"Rare", 
"set":"DRK", 
"setName":"The Dark", 
"text":"Trample (This creature can deal excess combat damage to defending player or planeswalker while attacking.)\nHaste (This creature can attack and {T} as soon as it comes under your control.)\nAt the beginning of the end step, sacrifice Ball Lightning.", 
"artist":"Quinton Hoover", 
"power":"6", 
"toughness":"1", 
"layout":"normal", 
"multiverseid":1783, 
"imageUrl":"http://gatherer.wizards.com/Handlers/Image.ashx?multiverseid=1783&type=card", 
"rulings":[ 
  { 
  "date":"2007-02-01", 
  "text":"The creature is sacrificed at the end of every turn in which it is on the battlefield. There is no choice about what turn to sacrifice it."}], 
  "printings":["DRK","4ED","5ED","pJGP","BTD","MED","M10","PD2"], 
  "originalText":"Trample\nBall Lightning may attack on the turn during which it is summoned. Ball Lightning is buried at the end of the turn during which it is summoned.", 
  "originalType":"Summon — Ball Lightning", 
  "legalities":[ 
    {"format":"Commander","legality":"Legal"}, 
    {"format":"Legacy","legality":"Legal"}, 
    {"format":"Modern","legality":"Legal"}, 
    {"format":"Vintage","legality":"Legal"} 
  ], 
  "id":"d7e1cba15888f4a6e82081a4c14123136fb9eb85" 
  } 
]} 

请您参考如下方法:

I'm having a little trouble displaying all of the values in a json response from an api especially round the rullings part where some of the values are in an array and have arrays in them.

您必须进一步遍历这些数组以获取显示它们的值

rulings: <br> 
  <% json['rulings'].each do |ruling| %><br> 
  <% end %> 
  <% json['legalities'].each do |play|%> 
    legality <%= play['format'] %> <%= play['legality'] %><br> 
  <% end %>