RubyOnRails + Trying to convert JSON into specific format - ruby

Question

Existing Data:
[
{"name"=> "login[0][id]", "value"=> "10"},
{"name"=> "login[0][name]", "value"=> "AAA"},
{"name"=> "login[0][login]", "value"=> "login-1"},
{"name"=> "login[0][password]", "value"=> "password-1"},
{"name"=> "login[0][notes]", "value"=> "url-1"},
{"name"=> "login[1][id]", "value"=> "15"},
{"name"=> "login[1][name]", "value"=> "BBB"},
{"name"=> "login[1][login]", "value"=> "admin"},
{"name"=> "login[1][password]", "value"=> "admin-pwd"},
{"name"=> "login[1][notes]", "value"=> "url-2"}
]
Expected:
[
"0" => {
"id": "10",
"name": "AAA",
"login", "login-1",
"password": "password-1",
"notes": "url-1"
},
"1" => {
"id": "15",
"name": "BBB",
"login", "ladmin",
"password": "admin-pwd",
"notes": "url-2"
}
]

Answer 1

One approach to convert the object to your desired format is to use a regex to extract the login number and associated attributes, like so:
def convert(array)
name_regex = /^login\[(?<number>\d+)\]\[(?<attribute>\S+)\]/
result = {}
array.each do |obj|
match = obj["name"].match(name_regex)
next if match.nil?
result[match[:number]] ||= {}
result[match[:number]][match[:attribute]] = obj["value"]
end
result
end
Then, given the initial array in your example, this method should return the following:
array = [
{ "name" => "login[0][id]", "value" => "10" },
{ "name" => "login[0][name]", "value" => "AAA" },
{ "name" => "login[0][login]", "value" => "login-1" },
{ "name" => "login[0][password]", "value" => "password-1" },
{ "name" => "login[0][notes]", "value" => "url-1" },
{ "name" => "login[1][id]", "value" => "15" },
{ "name" => "login[1][name]", "value" => "BBB" },
{ "name" => "login[1][login]", "value" => "admin" },
{ "name" => "login[1][password]", "value" => "admin-pwd" },
{ "name" => "login[1][notes]", "value" => "url-2" }
]
convert(array)
#=> {"0"=>{"id"=>"10", "name"=>"AAA", "login"=>"login-1", "password"=>"password-1", "notes"=>"url-1"}, "1"=>{"id"=>"15", "name"=>"BBB", "login"=>"admin", "password"=>"admin-pwd", "notes"=>"url-2"}}