Ruby - 遍历解析的 JSON

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问题描述

我正在尝试迭代来自 reddit 的 API 的已解析 JSON 响应.

I'm trying to iterate of a parsed JSON response from reddit's API.

我做了一些谷歌搜索，似乎其他人也遇到了这个问题，但似乎没有一个解决方案对我有用.Ruby 将 ['data]['children] 视为索引，这导致了错误，但我只是想从 JSON 中获取这些值.有什么建议吗?

I've done some googling and seems others have had this issue but none of the solutions seem to work for me. Ruby is treating ['data]['children] as indexes and that's causing the error but I'm just trying to grab these values from the JSON. Any advice?

我的代码:

require "net/http"
require "uri"
require "json"

uri = URI.parse("http://www.reddit.com/user/brain_poop/comments/.json")

response = Net::HTTP.get_response(uri)

data = JSON.parse(response.body)

data.each do |child|
    print child['data']['body']
end

我在终端中得到的错误信息:

The error message I get in terminal:

api-reddit-ruby.rb:12:in `[]': no implicit conversion of String into Integer (TypeError)
from api-reddit-ruby.rb:12:in `block in <main>'
from api-reddit-ruby.rb:11:in `each'
from api-reddit-ruby.rb:11:in `<main>'

推荐答案

您正在尝试迭代 data，它是一个散列，而不是一个列表.您需要通过 data['data']['children']

You're trying to iterate over data, which is a hash, not a list. You need to get the children array from your JSON object by data['data']['children']

require "net/http"
require "uri"
require "json"

uri = URI.parse("http://www.reddit.com/user/brain_poop/comments/.json")

response = Net::HTTP.get_response(uri)

data = JSON.parse(response.body)


data['data']['children'].each do |child|
    puts child['data']['body']
end

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