获取其中一个属性与 ruby​​ 匹配的 json 值

Question

我有一个 JSON 文件

  { "data": [
      {
          "channel_id":"test1",
          "who_to_ping":"user124",
          "workflow_status":"enabled",
          "non_workflow_status":"disabled",
          "auto_response_status":"enabled"
     },
     {
          "channel_id":"test2",
          "who_to_ping":"user476",
          "workflow_status":"enabled",
          "non_workflow_status":"disabled",
          "auto_response_status":"enabled"
     }
]}

我可以通过这样做访问数据并设置新用户：

channel_id = "test1"
name = "new user"
file_path = "#{Rails.root}/public/slack_config.json"
file = File.read(file_path)
data_hash = JSON.parse(file)
data_hash['data'][0]['who_to_ping'] = name
File.write(file_path, JSON.pretty_generate(JSON.dump(data_hash)))

我需要做的是只更新 channel_id 匹配的数组。例如 channel_id 将是一个传入的变量，它可能是 test1、test2 或其他值。如果我想将 test1 的 who_to_ping 更新为新名称 data_hash['data'][0]['who_to_ping'] 在传递的值是动态的情况下将不起作用。

我可以进行搜索以查看 channel_id 匹配哪个元素，然后如果它的第 8 个元素执行 data_hash['data'][7]['who_to_ping'] 但我确信有更有效的方法。这可能很简单，但我的搜索没有显示任何内容，但我不确定正确的搜索词是什么。

Answer 1

您可以通过data_hash['data']进行迭代和映射检查数据中的channel_id是否与传递的匹配，如果匹配则更改

data_hash['data'] = data_hash['data'].map do |data| # you can remove data_hash['data'] = and replace it by a destructible map! 
  if data['channel_id'] == channel_id
    data['who_to_ping'] = name
    # change other fields here too if you want
  end
  data # make sure to return data so the mapping work
end

File.write(file_path, JSON.pretty_generate(data_hash)) # no need to use dump as pretty_generate already will transform your hash into json