Question

以下是作为分配给string的字符串的有效负载响应，需要将其转换为哈希值。

{"method_name":"My function","success":true,"payload":[{"Type":"SM::Mod::Elu","Properties":{"TVset":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::VirtualArea","Properties":{"vad_val":{"Type":"String","Mutable":false,"Value":"0001"},"enabled":{"Type":"TrueClass","Mutable":false,"Value":true}},"Children":{"Music":{"Type":"SM::Mod::Base","Properties":{"reg_id":{"Type":"Fixnum","Mutable":true,"Value":null},"buffer_value":{"Type":"Fixnum","Mutable":true,"Value":10},"special_handling_table":{"Type":"SM::Mod::SpecialHandlingTable","Properties":{"behaviors_val":{"Type":"Hash","Mutable":false,"Value":{"1":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::Replace","Properties":{"direct":{"Type":"String","Mutable":true,"Value":"From"}},"Children":{}},{"Type":"SM::Mod::Behavior","Properties":{"direct_val":{"Type":"String","Mutable":true,"Value":"From"}},"Children":{}}],"IsActiveChange":null},"2":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::ReplaceSH","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"Fromnetwork"}},"Children":{}}],"IsActiveChange":null},"3":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::DropBehavior","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"Fromnetwork"}},"Children":{}}],"IsActiveChange":null},"4":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::StripHeaderres","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"ToTransport"}},"Children":{}},{"Type":"SM::Mod::DropBehavior","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"FromTransport"}},"Children":{}}],"IsActiveChange":null},"5":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::StripHeaderBehavior","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"Tosnmp"}},"Children":{}},{"Type":"SM::Mod::DropBehavior","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"FromTransport"}},"Children":{}}],"IsActiveChange":null},"6":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::ReplaceSHBehavior","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"Fromconn"}},"Children":{}}],"IsActiveChange":null},"7":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::Dropfem","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"FromTransport"}},"Children":{}}],"IsActiveChange":null},"8":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::Dropfem","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"From"}},"Children":{}}],"IsActiveChange":null},"9":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::DropBehavior","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"From"}},"Children":{}}],"IsActiveChange":null}},"IsActiveChange":null}},"Children":{}}},"Children":{}}}}],"IsActiveChange":null},"number":{"Type":"Fixnum","Mutable":false,"Value":0,"IsActiveChange":false},"connections":{"Type":"Fixnum","Mutable":true,"Value":null},"threads":{"Type":"Fixnum","Mutable":true,"Value":4},"updates":{"Type":"TrueClass","Mutable":true,"Value":null},"severity":{"Type":"Fixnum","Mutable":true,"Value":3},"levelval":{"Type":"Fixnum","Mutable":true,"Value":3},"facility":{"Type":"Fixnum","Mutable":true,"Value":3},"trace":{"Type":"smode::Depval::Fallback","Properties":{"enabled":{"Type":"TrueClass","Mutable":true,"Value":false},"depend":{"Type":"String","Mutable":false,"Value":""}},"Children":{}}},"Children":{}}],"error":""}

我需要通过解析来创建键和值对：

vad_val => "001" , enabled => true , req_id => NULL, buffer_value =>10

等。直到结束。我需要捕获string，fixnum和TrueClass的所有元素作为带键和值对的散列。

我可以理解下面的代码：

parsed = JSON.parse(string) # it returns a hash
p parsed["properties"]["someKey"]=value

可以将字符串转换为哈希值，但我不确定如何进行这种过滤。它需要进一步通过JSON来检索哈希值，但它会存储所有其他不需要的信息。如何执行过滤以获取某个键作为键（vad_val）和值（0001）等？我将非常感谢您对此的帮助。

Answer 1

据我了解，您希望遍历从原始数据创建的JSON以及每个嵌套（键/散列），其中散列具有“String”键，“String”，“TrueClass”或“ Fixnum“你想产生一个输出键/值，该键由键和哈希值中的”Value“键组成。

这应该这样做。它以递归方式检查原始JSON结构中的所有子哈希和数组，以查找上述匹配。

raw_data = '{"method_name":"My function","success":true,"payload":[{"Type":"SM::Mod::Elu","Properties":{"TVset":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::VirtualArea","Properties":{"vad_val":{"Type":"String","Mutable":false,"Value":"0001"},"enabled":{"Type":"TrueClass","Mutable":false,"Value":true}},"Children":{"Music":{"Type":"SM::Mod::Base","Properties":{"reg_id":{"Type":"Fixnum","Mutable":true,"Value":null},"buffer_value":{"Type":"Fixnum","Mutable":true,"Value":10},"special_handling_table":{"Type":"SM::Mod::SpecialHandlingTable","Properties":{"behaviors_val":{"Type":"Hash","Mutable":false,"Value":{"1":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::Replace","Properties":{"direct":{"Type":"String","Mutable":true,"Value":"From"}},"Children":{}},{"Type":"SM::Mod::Behavior","Properties":{"direct_val":{"Type":"String","Mutable":true,"Value":"From"}},"Children":{}}],"IsActiveChange":null},"2":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::ReplaceSH","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"Fromnetwork"}},"Children":{}}],"IsActiveChange":null},"3":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::DropBehavior","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"Fromnetwork"}},"Children":{}}],"IsActiveChange":null},"4":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::StripHeaderres","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"ToTransport"}},"Children":{}},{"Type":"SM::Mod::DropBehavior","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"FromTransport"}},"Children":{}}],"IsActiveChange":null},"5":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::StripHeaderBehavior","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"Tosnmp"}},"Children":{}},{"Type":"SM::Mod::DropBehavior","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"FromTransport"}},"Children":{}}],"IsActiveChange":null},"6":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::ReplaceSHBehavior","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"Fromconn"}},"Children":{}}],"IsActiveChange":null},"7":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::Dropfem","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"FromTransport"}},"Children":{}}],"IsActiveChange":null},"8":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::Dropfem","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"From"}},"Children":{}}],"IsActiveChange":null},"9":{"Type":"Array","Mutable":false,"Value":[{"Type":"SM::Mod::DropBehavior","Properties":{"decision":{"Type":"String","Mutable":true,"Value":"From"}},"Children":{}}],"IsActiveChange":null}},"IsActiveChange":null}},"Children":{}}},"Children":{}}}}],"IsActiveChange":null},"number":{"Type":"Fixnum","Mutable":false,"Value":0,"IsActiveChange":false},"connections":{"Type":"Fixnum","Mutable":true,"Value":null},"threads":{"Type":"Fixnum","Mutable":true,"Value":4},"updates":{"Type":"TrueClass","Mutable":true,"Value":null},"severity":{"Type":"Fixnum","Mutable":true,"Value":3},"levelval":{"Type":"Fixnum","Mutable":true,"Value":3},"facility":{"Type":"Fixnum","Mutable":true,"Value":3},"trace":{"Type":"smode::Depval::Fallback","Properties":{"enabled":{"Type":"TrueClass","Mutable":true,"Value":false},"depend":{"Type":"String","Mutable":false,"Value":""}},"Children":{}}},"Children":{}}],"error":""}'
require 'json'

def breakdown(set, result = {})
  if set.class == Hash # iterate through hash
    set.each do |k, v|
      if v.class == Hash && %w(String TrueClass Fixnum).include?((v["Type"] || ''))
        result[k.to_sym] = v["Value"] # add this key's value to the output array
      elsif v.class == Hash || v.class == Array
        result = breakdown(v, result) # check nested arrays and hashes
      end
    end
  elsif set.class == Array
    set.each do |a|
      result = breakdown(a, result) # check elements of an array
    end
  end
  result
end

broken_down = breakdown(JSON.parse(raw_data))
p broken_down
#> {:vad_val =>"0001", :enabled =>false, :reg_id =>nil, :buffer_value =>10, :direct =>"From", :direct_val =>"From", :decision =>"From", :number =>0, :connections =>nil, :threads =>4, :updates =>nil, :severity =>3, :levelval =>3, :facility =>3, :depend =>""}

EDIT 修改了上述内容以确保键是符号而不是字符串（以匹配所需的输出）

Answer 2

我不完全明白你想要的最终价值是什么样的。但是，您将迭代哈希以生成您想要的任何值。

filtered_parsed = parsed.select {|k,v| v.is_a? String}

这将仅选择值为字符串的元素。希望能让你朝着正确的方向前进。在ruby库中查看Enumerable以获取更多选项。

如何通过转换键和值对来过滤ruby中的有效负载响应

2 个答案: