Ruby: how to generate a json output with braces (brackets, parentheses, curlies) in a new line

Question

for a reference file compare a need the possibility to generate json files, where braces always start in a new line.

For Instance, the json hash:

my_json = {"Key" => {"Key" => "Value"}}

leads after the call of

JSON.pretty_generate(my_json)

to

{
  "Key": {
    "Key": "Value"
  }
}

But unfortunately I need an output like this:

{
  "Key": 
  {
    "Key": "Value"
  }
}

Is there any way to this with ruby without destroying the pretty formatting?

Thanks

Answer 1

Should you desire this difference in output, why don't you force it? As per my comment:

UPDATED to cover both { and [ bracket

my_json = {"Keys" => [{"Key" => "Value"},{"key1" => "val2"}], "newkey" => {"nk1" => "val3"}}

puts JSON::pretty_generate(my_json).gsub(
           /^(.*)(\"[^\"]+\"): ([\{\[])/, #first brackets: white space. Second: Key, Third: Bracket
           "\\1\\2:\n\\1\\3")             #\\1: white space (on both lines), \\2: Key, \\3: Brac[e|ket]

{
  "Keys":
  [
    {
      "Key": "Value"
    },
    {
      "key1": "val2"
    }
  ],
  "newkey":
  {
    "nk1": "val3"
  }
}