我希望我在Ruby on Rails中的JSON输出“漂亮”或格式化得很好。
现在,我调用to_json,我的JSON都在一行上。有时,很难看出JSON输出流中是否有问题。
有办法配置,使我的JSON“漂亮”或很好的格式在Rails?
我希望我在Ruby on Rails中的JSON输出“漂亮”或格式化得很好。
现在,我调用to_json,我的JSON都在一行上。有时,很难看出JSON输出流中是否有问题。
有办法配置,使我的JSON“漂亮”或很好的格式在Rails?
当前回答
# example of use:
a_hash = {user_info: {type: "query_service", e_mail: "my@email.com", 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
其他回答
如果您发现Ruby JSON库中内置的pretty_generate选项不够“漂亮”,我推荐您使用自己的NeatJSON gem进行格式化。
使用它:
gem install neatjson
然后使用
JSON.neat_generate
而不是
JSON.pretty_generate
像Ruby的pp一样,当对象和数组合适时,它会将它们放在一行上,但根据需要将它们包装成多行。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?"}
]
}
它还支持各种格式选项,以进一步自定义输出。例如,冒号前后有多少个空格?之前/之后逗号?在数组和对象的括号内?要对对象的键进行排序吗?你想让冒号都对齐吗?
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"}
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"
}
我使用以下,因为我发现标题,状态和JSON输出有用 一组。调用例程是根据railscasts在http://railscasts.com/episodes/151-rack-middleware?autoplay=true上的推荐进行的
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
如果你想:
自动美化应用程序中所有传出的JSON响应。 避免污染Object#to_json/#as_json 避免使用中间件解析/重新呈现JSON(讨厌!) 用铁路的方式去做!
然后……为JSON替换ActionController::Renderer !只需将以下代码添加到您的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