CODEWITHSUNDEEP
jsonruby
user5922898
user5922898

Reputation: 7

Iterate through json response and return one array

Code below returns me all counties as a string, I can see that by using inspect method.

def self.all_counties
    response['ChargeDevice'].each do |charger|
        puts ['ChargeDeviceLocation']['Address']['County'].inspect
    end
end

What would be the right way to store every returned string in one array so I can manipulate it later?

JSON

"ChargeDeviceLocation"   =>   {  
  "Latitude"      =>"51.605591",
  "Longitude"      =>"-0.339510",
  "Address"      =>      { 
     "County"         =>"Greater London",
     "Country"         =>"gb"
  }

Upvotes: 0

Views: 292

Answers (1)

Kimmo Lehto
Kimmo Lehto

Reputation: 6041

This works if the response has all the keys for every item:

counties = response['ChargeDevice'].map do |r|
  r.dig('ChargeDeviceLocation', 'Address', 'County')
end

Something like this will give you nils when the tree doesn't have entries for all items:

counties = response['ChargeDevice'].map do |r|
  r.fetch('ChargeDeviceLocation', {}).
    fetch('Address', {}).
    fetch('County', nil)
end

You could also use JSONPath (and ruby JSONPath gem).

require 'jsonpath'
counties = JsonPath.new('$..County').on(response.to_json)

Upvotes: 2

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