如何“漂亮” 格式化 JSON 输出

心意如水 2024-07-12 16:01:12

使用 pretty_generate() 函数，该函数内置于更高版本的 JSON 中。例如：

require 'json'
my_object = { :array => [1, 2, 3, { :sample => "hash"} ], :foo => "bar" }
puts JSON.pretty_generate(my_object)

这会让你：

{
  "array": [
    1,
    2,
    3,
    {
      "sample": "hash"
    }
  ],
  "foo": "bar"
}

Use the pretty_generate() function, built into later versions of JSON. For example:

require 'json'
my_object = { :array => [1, 2, 3, { :sample => "hash"} ], :foo => "bar" }
puts JSON.pretty_generate(my_object)

Which gets you:

{
  "array": [
    1,
    2,
    3,
    {
      "sample": "hash"
    }
  ],
  "foo": "bar"
}

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爱的十字路口 2024-07-12 16:01:12

HTML 中的

 标记与 JSON.pretty_generate 一起使用，将在您的视图中漂亮地呈现 JSON。  当我杰出的老板向我展示这个时，我非常高兴：

<% if @data.present? %>
   <pre><%= JSON.pretty_generate(@data) %></pre>
<% end %>

The <pre> tag in HTML, used with JSON.pretty_generate, will render the JSON pretty in your view. I was so happy when my illustrious boss showed me this:

<% if @data.present? %>
   <pre><%= JSON.pretty_generate(@data) %></pre>
<% end %>

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骷髅 2024-07-12 16:01:12

查看很棒的打印。将 JSON 字符串解析为 Ruby Hash，然后使用 ap 显示它，如下所示：

require "awesome_print"
require "json"

json = '{"holy": ["nested", "json"], "batman!": {"a": 1, "b": 2}}'

ap(JSON.parse(json))

通过上面的内容，您将看到：

{
  "holy" => [
    [0] "nested",
    [1] "json"
  ],
  "batman!" => {
    "a" => 1,
    "b" => 2
  }
}

Awesome Print 还会添加一些 Stack Overflow 不会向您显示的颜色。

Check out Awesome Print. Parse the JSON string into a Ruby Hash, then display it with ap like so:

require "awesome_print"
require "json"

json = '{"holy": ["nested", "json"], "batman!": {"a": 1, "b": 2}}'

ap(JSON.parse(json))

With the above, you'll see:

{
  "holy" => [
    [0] "nested",
    [1] "json"
  ],
  "batman!" => {
    "a" => 1,
    "b" => 2
  }
}

Awesome Print will also add some color that Stack Overflow won't show you.

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清风无影 2024-07-12 16:01:12

借助 Rack Middleware 和 Rails 3，您可以为每个请求输出漂亮的 JSON，而无需更改应用程序的任何控制器。我已经编写了这样的中间件片段，并且在浏览器和 curl 输出中得到了很好的打印 JSON。

class PrettyJsonResponse
  def initialize(app)
    @app = app
  end

  def call(env)
    status, headers, response = @app.call(env)
    if headers["Content-Type"] =~ /^application\/json/
      obj = JSON.parse(response.body)
      pretty_str = JSON.pretty_unparse(obj)
      response = [pretty_str]
      headers["Content-Length"] = pretty_str.bytesize.to_s
    end
    [status, headers, response]
  end
end

上面的代码应该放在 Rails 项目的 app/middleware/pretty_json_response.rb 中。
最后一步是在 config/environments/development.rb 中注册中间件：

config.middleware.use PrettyJsonResponse

我不建议在 Production.rb 中使用它。 JSON 重新解析可能会降低生产应用程序的响应时间和吞吐量。最终可能会引入额外的逻辑（例如“X-Pretty-Json：true”标头）来触发按需手动卷曲请求的格式化。

（使用 Rails 3.2.8-5.0.0、Ruby 1.9.3-2.2.0、Linux 进行测试）

Thanks to Rack Middleware and Rails 3 you can output pretty JSON for every request without changing any controller of your app. I have written such middleware snippet and I get nicely printed JSON in browser and curl output.

class PrettyJsonResponse
  def initialize(app)
    @app = app
  end

  def call(env)
    status, headers, response = @app.call(env)
    if headers["Content-Type"] =~ /^application\/json/
      obj = JSON.parse(response.body)
      pretty_str = JSON.pretty_unparse(obj)
      response = [pretty_str]
      headers["Content-Length"] = pretty_str.bytesize.to_s
    end
    [status, headers, response]
  end
end

The above code should be placed in app/middleware/pretty_json_response.rb of your Rails project.
And the final step is to register the middleware in config/environments/development.rb:

config.middleware.use PrettyJsonResponse

I don't recommend to use it in production.rb. The JSON reparsing may degrade response time and throughput of your production app. Eventually extra logic such as 'X-Pretty-Json: true' header may be introduced to trigger formatting for manual curl requests on demand.

(Tested with Rails 3.2.8-5.0.0, Ruby 1.9.3-2.2.0, Linux)

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浪漫之都 2024-07-12 16:01:12

如果你想处理active_record对象，`puts`就足够了。

例如：

则不使用 puts

2.6.0 (main):0 > User.first.to_json
  User Load (0.4ms)  SELECT  "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT $1  [["LIMIT", 1]]
=> "{\"id\":1,\"admin\":true,\"email\":\"[email protected]\",\"password_digest\":\"$2a$10$TQy3P7NT8KrdCzliNUsZzuhmo40LGKoth2hwD3OI.kD0lYiIEwB1y\",\"created_at\":\"2021-07-20T08:34:19.350Z\",\"updated_at\":\"2021-07-20T08:34:19.350Z\",\"name\":\"Arden Stark\"}"

，而使用 puts，

2.6.0 (main):0 > puts User.first.to_json
  User Load (0.3ms)  SELECT  "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT $1  [["LIMIT", 1]]
{"id":1,"admin":true,"email":"[email protected]","password_digest":"$2a$10$TQy3P7NT8KrdCzliNUsZzuhmo40LGKoth2hwD3OI.kD0lYiIEwB1y","created_at":"2021-07-20T08:34:19.350Z","updated_at":"2021-07-20T08:34:19.350Z","name":"Arden Stark"}
=> nil

如果您要处理 json 数据， JSON.pretty_generate 是一个很好的替代

方案示例：

obj = {foo: [:bar, :baz], bat: {bam: 0, bad: 1}}
json = JSON.pretty_generate(obj)
puts json

输出：

{
  "foo": [
    "bar",
    "baz"
  ],
  "bat": {
    "bam": 0,
    "bad": 1
  }
}

如果它在 ROR 项目中，我总是更喜欢使用 gem `pry-rails` 进行格式化我在rails控制台中的代码而不是awesome_print中的代码太冗长了。

pry-rails 示例：

它还具有语法突出显示。

if you want to handle active_record object, `puts` is enough.

for example:

without puts

2.6.0 (main):0 > User.first.to_json
  User Load (0.4ms)  SELECT  "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT $1  [["LIMIT", 1]]
=> "{\"id\":1,\"admin\":true,\"email\":\"[email protected]\",\"password_digest\":\"$2a$10$TQy3P7NT8KrdCzliNUsZzuhmo40LGKoth2hwD3OI.kD0lYiIEwB1y\",\"created_at\":\"2021-07-20T08:34:19.350Z\",\"updated_at\":\"2021-07-20T08:34:19.350Z\",\"name\":\"Arden Stark\"}"

with puts

2.6.0 (main):0 > puts User.first.to_json
  User Load (0.3ms)  SELECT  "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT $1  [["LIMIT", 1]]
{"id":1,"admin":true,"email":"[email protected]","password_digest":"$2a$10$TQy3P7NT8KrdCzliNUsZzuhmo40LGKoth2hwD3OI.kD0lYiIEwB1y","created_at":"2021-07-20T08:34:19.350Z","updated_at":"2021-07-20T08:34:19.350Z","name":"Arden Stark"}
=> nil

if you are handle the json data, JSON.pretty_generate is a good alternative

Example:

obj = {foo: [:bar, :baz], bat: {bam: 0, bad: 1}}
json = JSON.pretty_generate(obj)
puts json

Output:

{
  "foo": [
    "bar",
    "baz"
  ],
  "bat": {
    "bam": 0,
    "bad": 1
  }
}

if it's in the ROR project, I always prefer to use gem `pry-rails` to format my codes in the `rails console` rather than `awesome_print` which is too verbose.

Example of pry-rails:

it also has syntax highlight.

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盗琴音 2024-07-12 16:01:12

这是一个中间件解决方案，修改自@gertas 的这个优秀答案。该解决方案不是 Rails 特定的——它应该适用于任何 Rack 应用程序。

此处使用的中间件技术（使用 #each）在 ASCIIcasts 151：机架中间件中进行了解释艾芬·贝德福德。

此代码位于 app/middleware/pretty_json_response.rb 中：

class PrettyJsonResponse

  def initialize(app)
    @app = app
  end

  def call(env)
    @status, @headers, @response = @app.call(env)
    [@status, @headers, self]
  end

  def each(&block)
    @response.each do |body|
      if @headers["Content-Type"] =~ /^application\/json/
        body = pretty_print(body)
      end
      block.call(body)
    end
  end

  private

  def pretty_print(json)
    obj = JSON.parse(json)  
    JSON.pretty_unparse(obj)
  end

end

要打开它，请将其添加到 config/environments/test.rb 和 config/environments/development.rb 中：

config.middleware.use "PrettyJsonResponse"

正如 @gertas 在他的版本中警告的那样避免在生产中使用此解决方案。有点慢。

使用 Rails 4.1.6 进行测试。

Here is a middleware solution modified from this excellent answer by @gertas. This solution is not Rails specific--it should work with any Rack application.

The middleware technique used here, using #each, is explained at ASCIIcasts 151: Rack Middleware by Eifion Bedford.

This code goes in app/middleware/pretty_json_response.rb:

class PrettyJsonResponse

  def initialize(app)
    @app = app
  end

  def call(env)
    @status, @headers, @response = @app.call(env)
    [@status, @headers, self]
  end

  def each(&block)
    @response.each do |body|
      if @headers["Content-Type"] =~ /^application\/json/
        body = pretty_print(body)
      end
      block.call(body)
    end
  end

  private

  def pretty_print(json)
    obj = JSON.parse(json)  
    JSON.pretty_unparse(obj)
  end

end

To turn it on, add this to config/environments/test.rb and config/environments/development.rb:

config.middleware.use "PrettyJsonResponse"

As @gertas warns in his version of this solution, avoid using it in production. It's somewhat slow.

Tested with Rails 4.1.6.

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最好是你 2024-07-12 16:01:12

将 ActiveRecord 对象转储为 JSON（在 Rails 控制台中）：

pp User.first.as_json

# => {
 "id" => 1,
 "first_name" => "Polar",
 "last_name" => "Bear"
}

Dumping an ActiveRecord object to JSON (in the Rails console):

pp User.first.as_json

# => {
 "id" => 1,
 "first_name" => "Polar",
 "last_name" => "Bear"
}

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好菇凉咱不稀罕他 2024-07-12 16:01:12

如果您发现 Ruby JSON 库内置的 pretty_generate 选项不够“漂亮”，我推荐我自己的 NeatJSON gem 用于您的格式设置。

使用它：

gem install neatjson

然后使用

JSON.neat_generate

，而不是

JSON.pretty_generate

像 Ruby 的 pp 那样，它将在对象和数组适合时将它们保留在一行上，但根据需要包装为多行。例如：

{
  "navigation.createroute.poi":[
    {"text":"Lay in a course to the Hilton","params":{"poi":"Hilton"}},
    {"text":"Take me to the airport","params":{"poi":"airport"}},
    {"text":"Let's go to IHOP","params":{"poi":"IHOP"}},
    {"text":"Show me how to get to The Med","params":{"poi":"The Med"}},
    {"text":"Create a route to Arby's","params":{"poi":"Arby's"}},
    {
      "text":"Go to the Hilton by the Airport",
      "params":{"poi":"Hilton","location":"Airport"}
    },
    {
      "text":"Take me to the Fry's in Fresno",
      "params":{"poi":"Fry's","location":"Fresno"}
    }
  ],
  "navigation.eta":[
    {"text":"When will we get there?"},
    {"text":"When will I arrive?"},
    {"text":"What time will I get to the destination?"},
    {"text":"What time will I reach the destination?"},
    {"text":"What time will it be when I arrive?"}
  ]
}

它还支持各种格式化选项以进一步自定义您的输出。例如，冒号之前/之后有多少个空格？逗号之前/之后？数组和对象的括号内？您想对对象的键进行排序吗？您希望冒号全部对齐吗？

If you find that the pretty_generate option built into Ruby's JSON library is not "pretty" enough, I recommend my own NeatJSON gem for your formatting.

To use it:

gem install neatjson

and then use

JSON.neat_generate

instead of

JSON.pretty_generate

Like Ruby's pp it will keep objects and arrays on one line when they fit, but wrap to multiple as needed. For example:

{
  "navigation.createroute.poi":[
    {"text":"Lay in a course to the Hilton","params":{"poi":"Hilton"}},
    {"text":"Take me to the airport","params":{"poi":"airport"}},
    {"text":"Let's go to IHOP","params":{"poi":"IHOP"}},
    {"text":"Show me how to get to The Med","params":{"poi":"The Med"}},
    {"text":"Create a route to Arby's","params":{"poi":"Arby's"}},
    {
      "text":"Go to the Hilton by the Airport",
      "params":{"poi":"Hilton","location":"Airport"}
    },
    {
      "text":"Take me to the Fry's in Fresno",
      "params":{"poi":"Fry's","location":"Fresno"}
    }
  ],
  "navigation.eta":[
    {"text":"When will we get there?"},
    {"text":"When will I arrive?"},
    {"text":"What time will I get to the destination?"},
    {"text":"What time will I reach the destination?"},
    {"text":"What time will it be when I arrive?"}
  ]
}

It also supports a variety of formatting options to further customize your output. For example, how many spaces before/after colons? Before/after commas? Inside the brackets of arrays and objects? Do you want to sort the keys of your object? Do you want the colons to all be lined up?

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花想c 2024-07-12 16:01:12

使用

 HTML 代码和 pretty_generate 是个好技巧：

<%
  require 'json'

  hash = JSON[{hey: "test", num: [{one: 1, two: 2, threes: [{three: 3, tthree: 33}]}]}.to_json] 
%>

<pre>
  <%=  JSON.pretty_generate(hash) %>
</pre>

Using <pre> HTML code and pretty_generate is good trick:

<%
  require 'json'

  hash = JSON[{hey: "test", num: [{one: 1, two: 2, threes: [{three: 3, tthree: 33}]}]}.to_json] 
%>

<pre>
  <%=  JSON.pretty_generate(hash) %>
</pre>

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终遇你 2024-07-12 16:01:12

如果您想要：

自动美化应用程序的所有传出 JSON 响应。
避免污染 Object#to_json/#as_json
避免使用中间件解析/重新渲染 JSON（恶心！）按照
RAILS 方式进行！

然后...将 ActionController::Renderer 替换为 JSON！只需将以下代码添加到您的 ApplicationController 中：

ActionController::Renderers.add :json do |json, options|
  unless json.kind_of?(String)
    json = json.as_json(options) if json.respond_to?(:as_json)
    json = JSON.pretty_generate(json, options)
  end

  if options[:callback].present?
    self.content_type ||= Mime::JS
    "#{options[:callback]}(#{json})"
  else
    self.content_type ||= Mime::JSON
    json
  end
end

If you want to:

Prettify all outgoing JSON responses from your app automatically.
Avoid polluting Object#to_json/#as_json
Avoid parsing/re-rendering JSON using middleware (YUCK!)
Do it the RAILS WAY!

Then ... replace the ActionController::Renderer for JSON! Just add the following code to your ApplicationController:

ActionController::Renderers.add :json do |json, options|
  unless json.kind_of?(String)
    json = json.as_json(options) if json.respond_to?(:as_json)
    json = JSON.pretty_generate(json, options)
  end

  if options[:callback].present?
    self.content_type ||= Mime::JS
    "#{options[:callback]}(#{json})"
  else
    self.content_type ||= Mime::JSON
    json
  end
end

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蛮可爱 2024-07-12 16:01:12

这是我在搜索过程中从其他帖子中得出的解决方案。

这允许您根据需要将 pp 和 jj 输出发送到文件。

require "pp"
require "json"

class File
  def pp(*objs)
    objs.each {|obj|
      PP.pp(obj, self)
    }
    objs.size <= 1 ? objs.first : objs
  end
  def jj(*objs)
    objs.each {|obj|
      obj = JSON.parse(obj.to_json)
      self.puts JSON.pretty_generate(obj)
    }
    objs.size <= 1 ? objs.first : objs
  end
end

test_object = { :name => { first: "Christopher", last: "Mullins" }, :grades => [ "English" => "B+", "Algebra" => "A+" ] }

test_json_object = JSON.parse(test_object.to_json)

File.open("log/object_dump.txt", "w") do |file|
  file.pp(test_object)
end

File.open("log/json_dump.txt", "w") do |file|
  file.jj(test_json_object)
end

Here's my solution which I derived from other posts during my own search.

This allows you to send the pp and jj output to a file as needed.

require "pp"
require "json"

class File
  def pp(*objs)
    objs.each {|obj|
      PP.pp(obj, self)
    }
    objs.size <= 1 ? objs.first : objs
  end
  def jj(*objs)
    objs.each {|obj|
      obj = JSON.parse(obj.to_json)
      self.puts JSON.pretty_generate(obj)
    }
    objs.size <= 1 ? objs.first : objs
  end
end

test_object = { :name => { first: "Christopher", last: "Mullins" }, :grades => [ "English" => "B+", "Algebra" => "A+" ] }

test_json_object = JSON.parse(test_object.to_json)

File.open("log/object_dump.txt", "w") do |file|
  file.pp(test_object)
end

File.open("log/json_dump.txt", "w") do |file|
  file.jj(test_json_object)
end

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自此以后，行同陌路 2024-07-12 16:01:12

如果您希望在 Rails 控制器操作中快速实现此操作以发送 JSON 响应：

def index
  my_json = '{ "key": "value" }'
  render json: JSON.pretty_generate( JSON.parse my_json )
end

If you're looking to quickly implement this in a Rails controller action to send a JSON response:

def index
  my_json = '{ "key": "value" }'
  render json: JSON.pretty_generate( JSON.parse my_json )
end

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无尽的现实 2024-07-12 16:01:12

#At Controller
def branch
    @data = Model.all
    render json: JSON.pretty_generate(@data.as_json)
end

#At Controller
def branch
    @data = Model.all
    render json: JSON.pretty_generate(@data.as_json)
end

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若水微香 2024-07-12 16:01:12

漂亮的打印变体（Rails）：

my_obj = {
  'array' => [1, 2, 3, { "sample" => "hash"}, 44455, 677778, nil ],
  foo: "bar", rrr: {"pid": 63, "state with nil and \"nil\"": false},
  wwww: 'w' * 74
}

require 'pp'
puts my_obj.as_json.pretty_inspect.
            gsub('=>', ': ').
            gsub(/"(?:[^"\\]|\\.)*"|\bnil\b/) {|m| m == 'nil' ? 'null' : m }.
            gsub(/\s+$/, "")

结果：

{"array": [1, 2, 3, {"sample": "hash"}, 44455, 677778, null],
 "foo": "bar",
 "rrr": {"pid": 63, "state with nil and \"nil\"": false},
 "wwww":
  "wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww"}

Pretty print variant (Rails):

my_obj = {
  'array' => [1, 2, 3, { "sample" => "hash"}, 44455, 677778, nil ],
  foo: "bar", rrr: {"pid": 63, "state with nil and \"nil\"": false},
  wwww: 'w' * 74
}

require 'pp'
puts my_obj.as_json.pretty_inspect.
            gsub('=>', ': ').
            gsub(/"(?:[^"\\]|\\.)*"|\bnil\b/) {|m| m == 'nil' ? 'null' : m }.
            gsub(/\s+$/, "")

Result:

{"array": [1, 2, 3, {"sample": "hash"}, 44455, 677778, null],
 "foo": "bar",
 "rrr": {"pid": 63, "state with nil and \"nil\"": false},
 "wwww":
  "wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww"}

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阳光的暖冬 2024-07-12 16:01:12

我使用过 gem CodeRay，效果非常好。该格式包括颜色，并且它可以识别许多不同的格式。

我已经在可用于调试 Rails API 的 gem 上使用了它，并且效果非常好。

顺便说一句，该 gem 名为“api_explorer”（http://www.github.com/toptierlabs/api_explorer )

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长伴 2024-07-12 16:01:12


# example of use:
a_hash = {user_info: {type: "query_service", e_mail: "[email protected]", phone: "+79876543322"}, cars_makers: ["bmw", "mitsubishi"], car_models: [bmw: {model: "1er", year_mfc: 2006}, mitsubishi: {model: "pajero", year_mfc: 1997}]}
pretty_html = a_hash.pretty_html

# include this module to your libs:
module MyPrettyPrint
    def pretty_html indent = 0
        result = ""
        if self.class == Hash
            self.each do |key, value|
                result += "#{key}
: #{[Array, Hash].include?(value.class) ? value.pretty_html(indent+1) : value}"
            end
        elsif self.class == Array
            result = "[#{self.join(', ')}]"
        end
        "#{result}"
    end

end

class Hash
    include MyPrettyPrint
end

class Array
    include MyPrettyPrint
end


# example of use:
a_hash = {user_info: {type: "query_service", e_mail: "[email protected]", phone: "+79876543322"}, cars_makers: ["bmw", "mitsubishi"], car_models: [bmw: {model: "1er", year_mfc: 2006}, mitsubishi: {model: "pajero", year_mfc: 1997}]}
pretty_html = a_hash.pretty_html

# include this module to your libs:
module MyPrettyPrint
    def pretty_html indent = 0
        result = ""
        if self.class == Hash
            self.each do |key, value|
                result += "#{key}
: #{[Array, Hash].include?(value.class) ? value.pretty_html(indent+1) : value}"
            end
        elsif self.class == Array
            result = "[#{self.join(', ')}]"
        end
        "#{result}"
    end

end

class Hash
    include MyPrettyPrint
end

class Array
    include MyPrettyPrint
end

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慕巷 2024-07-12 16:01:12

我使用以下内容，因为我发现标头、状态和 JSON 输出很有用
一套。调用例程根据 Railscasts 演示文稿的建议进行了分解，网址为： http://railscasts .com/episodes/151-rack-middleware?autoplay=true

  class LogJson

  def initialize(app)
    @app = app
  end

  def call(env)
    dup._call(env)
  end

  def _call(env)
    @status, @headers, @response = @app.call(env)
    [@status, @headers, self]
  end

  def each(&block)
    if @headers["Content-Type"] =~ /^application\/json/
      obj = JSON.parse(@response.body)
      pretty_str = JSON.pretty_unparse(obj)
      @headers["Content-Length"] = Rack::Utils.bytesize(pretty_str).to_s
      Rails.logger.info ("HTTP Headers:  #{ @headers } ")
      Rails.logger.info ("HTTP Status:  #{ @status } ")
      Rails.logger.info ("JSON Response:  #{ pretty_str} ")
    end

    @response.each(&block)
  end
  end

I use the following as I find the headers, status and JSON output useful as
a set. The call routine is broken out on recommendation from a railscasts presentation at: http://railscasts.com/episodes/151-rack-middleware?autoplay=true

  class LogJson

  def initialize(app)
    @app = app
  end

  def call(env)
    dup._call(env)
  end

  def _call(env)
    @status, @headers, @response = @app.call(env)
    [@status, @headers, self]
  end

  def each(&block)
    if @headers["Content-Type"] =~ /^application\/json/
      obj = JSON.parse(@response.body)
      pretty_str = JSON.pretty_unparse(obj)
      @headers["Content-Length"] = Rack::Utils.bytesize(pretty_str).to_s
      Rails.logger.info ("HTTP Headers:  #{ @headers } ")
      Rails.logger.info ("HTTP Status:  #{ @status } ")
      Rails.logger.info ("JSON Response:  #{ pretty_str} ")
    end

    @response.each(&block)
  end
  end

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叫思念不要吵 2024-07-12 16:01:12

我在 Rails 控制台中有一个 JSON 对象，并且想在控制台中很好地显示它（而不是像一个巨大的连接字符串一样显示），它很简单：

data.as_json

I had a JSON object in the rails console, and wanted to display it nicely in the console (as opposed to displaying like a massive concatenated string), it was as simple as:

data.as_json

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帥小哥 2024-07-12 16:01:12

如果您使用 RABL，您可以按照此处使用 JSON.pretty_generate：

class PrettyJson
  def self.dump(object)
    JSON.pretty_generate(object, {:indent => "  "})
  end
end

Rabl.configure do |config|
  ...
  config.json_engine = PrettyJson if Rails.env.development?
  ...
end

使用 JSON.pretty_generate 的一个问题是 JSON 模式验证器将不再满意您的日期时间字符串。您可以使用以下命令修复 config/initializers/rabl_config.rb 中的这些内容：

ActiveSupport::TimeWithZone.class_eval do
  alias_method :orig_to_s, :to_s
  def to_s(format = :default)
    format == :default ? iso8601 : orig_to_s(format)
  end
end

If you are using RABL you can configure it as described here to use JSON.pretty_generate:

class PrettyJson
  def self.dump(object)
    JSON.pretty_generate(object, {:indent => "  "})
  end
end

Rabl.configure do |config|
  ...
  config.json_engine = PrettyJson if Rails.env.development?
  ...
end

A problem with using JSON.pretty_generate is that JSON schema validators will no longer be happy with your datetime strings. You can fix those in your config/initializers/rabl_config.rb with:

ActiveSupport::TimeWithZone.class_eval do
  alias_method :orig_to_s, :to_s
  def to_s(format = :default)
    format == :default ? iso8601 : orig_to_s(format)
  end
end

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苦妄 2024-07-12 16:01:12

我能想到的最简单的例子：

my_json = '{ "name":"John", "age":30, "car":null }'
puts JSON.pretty_generate(JSON.parse(my_json))

Rails 控制台示例：

core dev 1555:0> my_json = '{ "name":"John", "age":30, "car":null }'
=> "{ \"name\":\"John\", \"age\":30, \"car\":null }"
core dev 1556:0> puts JSON.pretty_generate(JSON.parse(my_json))
{
  "name": "John",
  "age": 30,
  "car": null
}
=> nil

Simplest example, I could think of:

my_json = '{ "name":"John", "age":30, "car":null }'
puts JSON.pretty_generate(JSON.parse(my_json))

Rails console example:

core dev 1555:0> my_json = '{ "name":"John", "age":30, "car":null }'
=> "{ \"name\":\"John\", \"age\":30, \"car\":null }"
core dev 1556:0> puts JSON.pretty_generate(JSON.parse(my_json))
{
  "name": "John",
  "age": 30,
  "car": null
}
=> nil

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如何“漂亮” 格式化 JSON 输出

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发布评论

评论（20）

如果你想处理active_record对象，`puts`就足够了。

如果您要处理 json 数据， JSON.pretty_generate 是一个很好的替代

如果它在 ROR 项目中，我总是更喜欢使用 gem `pry-rails` 进行格式化我在rails控制台中的代码而不是awesome_print中的代码太冗长了。

if you want to handle active_record object, `puts` is enough.

if you are handle the json data, JSON.pretty_generate is a good alternative

if it's in the ROR project, I always prefer to use gem `pry-rails` to format my codes in the `rails console` rather than `awesome_print` which is too verbose.

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yy2010hell

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如何“漂亮” 格式化 JSON 输出

如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

评论（20）

如果你想处理active_record对象，puts就足够了。

如果您要处理 json 数据， JSON.pretty_generate 是一个很好的替代

如果它在 ROR 项目中，我总是更喜欢使用 gem pry-rails 进行格式化我在rails控制台中的代码而不是awesome_print中的代码太冗长了。

if you want to handle active_record object, puts is enough.

if you are handle the json data, JSON.pretty_generate is a good alternative

if it's in the ROR project, I always prefer to use gem pry-rails to format my codes in the rails console rather than awesome_print which is too verbose.

关于作者

相关话题

热门标签

推荐作者

Promise

qq_lbRlsh

待＂谢繁草

yy2010hell

漫无边际

傲娇萝莉攻

友情链接

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

如果你想处理active_record对象，`puts`就足够了。

如果它在 ROR 项目中，我总是更喜欢使用 gem `pry-rails` 进行格式化我在rails控制台中的代码而不是awesome_print中的代码太冗长了。

if you want to handle active_record object, `puts` is enough.

if it's in the ROR project, I always prefer to use gem `pry-rails` to format my codes in the `rails console` rather than `awesome_print` which is too verbose.