Ruby JSON.pretty_generate ...非常有价值 [英] Ruby JSON.pretty_generate ... is pretty unpretty

问题描述

我似乎无法获得 JSON.pretty_generate（），以便在Rails中真正生成漂亮的输出。

I can't seem to get JSON.pretty_generate() to actually generate pretty output in Rails.

我正在使用Rails 2.3.5，它似乎自动加载JSON宝石。真棒。在使用脚本/控制台时，确实会产生JSON：

I'm using Rails 2.3.5 and it seems to automatically load the JSON gem. Awesome. While using script/console this does indeed produce JSON:

some_data = {'foo' => 1, 'bar' => 20, 'cow' => [1, 2, 3, 4], 'moo' => {'dog' => 'woof', 'cat' => 'meow'}}
some_data.to_json
=> "{\"cow\":[1,2,3,4],\"moo\":{\"cat\":\"meow\",\"dog\":\"woof\"},\"foo\":1,\"bar\":20}"

但这不会产生漂亮的输出：

But this doesn't produce pretty output:

JSON.pretty_generate(some_data)
=> "{\"cow\":[1,2,3,4],\"moo\":{\"cat\":\"meow\",\"dog\":\"woof\"},\"foo\":1,\"bar\":20}"

我发现生成它的唯一方法是使用 irb 并加载Pure版本：

The only way I've found to generate it is to use irb and to load the "Pure" version:

require 'rubygems'
require 'json/pure'
some_data = {'foo' => 1, 'bar' => 20, 'cow' => [1, 2, 3, 4], 'moo' => {'dog' => 'woof', 'cat' => 'meow'}}
JSON.pretty_generate(some_data)
=> "{\n  \"cow\": [\n    1,\n    2,\n    3,\n    4\n  ],\n  \"moo\": {\n    \"cat\": \"meow\",\n    \"dog\": \"woof\"\n  },\n  \"foo\": 1,\n  \"bar\": 20\n}"

但是，我真正想要的是Rails制作这个。有没有人有任何提示，为什么我不能让Rails中的生成器正常工作？

BUT, what I really want is Rails to produce this. Does anyone have any tips why I can't get the generator in Rails to work correctly?

谢谢！

Thanks!

推荐答案

为了生成漂亮的JSON输出，看起来你只是缺少 puts 调用。

To generate pretty JSON output it appears that you're only missing a puts call.

数据：

The data:

some_data = {'foo' => 1, 'bar' => 20, 'cow' => [1, 2, 3, 4], 'moo' => {'dog' => 'woof', 'cat' => 'meow'}}

只调用 JSON.pretty_generate ：

> JSON.pretty_generate some_data
 => "{\n  \"foo\": 1,\n  \"bar\": 20,\n  \"cow\": [\n    1,\n    2,\n    3,\n    4\n  ],\n  \"moo\": {\n    \"dog\": \"woof\",\n    \"cat\": \"meow\"\n  }\n}"

添加一个把加入混合：

Adding a puts into the mix:

> puts JSON.pretty_generate some_data
{
  "foo": 1,
  "bar": 20,
  "cow": [
    1,
    2,
    3,
    4
  ],
  "moo": {
    "dog": "woof",
    "cat": "meow"
  }
}

这篇关于Ruby JSON.pretty_generate ...非常有价值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！