Problems Parsing a Json File in Ruby - json

Question

I'm pretty new to programming ruby and using json packages, I think I'm facing a typical noob-error, but I just cant find my mistake for two days now.. I've started like this:
require 'discogs-wrapper'
require 'json'
aw = Discogs::Wrapper.new("my_application", user_token: "my_user_token")
inv = aw.get_user_inventory('my_user_name', :per_page => 1, :page => 1)
p=JSON.parse(inv)
What I recieve is this:
C:/Ruby24-x64/lib/ruby/2.4.0/json/common.rb:156:in `initialize': no implicit conversion of Hashie::Mash into String (TypeError)
from C:/Ruby24-x64/lib/ruby/2.4.0/json/common.rb:156:in `new'
from C:/Ruby24-x64/lib/ruby/2.4.0/json/common.rb:156:in `parse'
from C:/Users/rtuz2th/.RubyMine2017.3/config/scratches/scratch.rb:6:in `<top (required)>'
from -e:1:in `load'
from -e:1:in `<main>'
I've already been searching your forum and I've learned that this error probably means that I do not have a correct JSON-file (although it comes straight from the discogs-api, I basically thought these guys know what they do). So what I tried next was
require 'discogs-wrapper'
require 'json'
aw = Discogs::Wrapper.new("my_application", user_token: "my_user_token")
inv = aw.get_user_inventory('my_user_name', :per_page => 1, :page => 1)
inv = inv.to_json
p=JSON.parse(inv)
So at least, my code runs without any errors now. But when I try to refer to any information in inv, I just get empty responses. inv (without the .to_json looks like this:
{"pagination"=>
{"per_page"=>1,
"items"=>13692,
"page"=>1,
"urls"=>
{"last"=>
"URL containing tokens",
"next"=>
"URL containing tokens"},
"pages"=>13692},
"listings"=>
[{"status"=>"Draft",
"original_price"=>
{"curr_abbr"=>"EUR",
"formatted"=>"\u20AC10.46",
"value"=>10.46,
"curr_id"=>3},
"weight"=>230.0,
"original_shipping_price"=>
{"curr_abbr"=>"EUR",
"formatted"=>"\u20AC5.90",
"value"=>5.9,
"curr_id"=>3},
"price"=>{"currency"=>"EUR", "value"=>10.46},
"allow_offers"=>true,
"uri"=>"https://www.discogs.com/sell/item/437965910",
"sleeve_condition"=>"Very Good Plus (VG+)",
"format_quantity"=>1,
"id"=>437965910,
"shipping_price"=>{"currency"=>"EUR", "value"=>5.9},
"posted"=>"2017-02-07T23:43:01-08:00",
"ships_from"=>"Germany",
"in_cart"=>false,
"comments"=>"",
"seller"=>
{"username"=>"zweischeiben.de",
"stats"=>{"rating"=>"100.0", "total"=>143, "stars"=>5.0},
"uid"=>3359767,
"url"=>"https://api.discogs.com/users/zweischeiben.de",
"html_url"=>"https://www.discogs.com/user/zweischeiben.de",
"shipping"=>
"(Lots of information about shipping, cut just cut it out)"
"payment"=>"Bank Transfer, PayPal",
"avatar_url"=>
"(cut out url)",
"resource_url"=>"https://api.discogs.com/users/zweischeiben.de",
"id"=>3359767},
"condition"=>"Near Mint (NM or M-)",
"release"=>
{"thumbnail"=>
"(cut out url)",
"description"=>"Steamhammer - Mountains (LP, Album, RE)",
"artist"=>"Steamhammer",
"format"=>"LP, Album, RE",
"resource_url"=>"https://api.discogs.com/releases/7303333",
"title"=>"Mountains",
"year"=>0,
"id"=>7303333,
"catalog_number"=>"201.006, 0201.006"},
"resource_url"=>"https://api.discogs.com/marketplace/listings/437965910",
"audio"=>false,
"external_id"=>"3, 16",
"location"=>"T52574"}]}
But if I now try to refer to eg the location:
require 'discogs-wrapper'
require 'json'
aw = Discogs::Wrapper.new("my_application", user_token: "my_token")
inv=aw.get_user_inventory('my_username', :per_page => 1, :page => 1)
inv=inv.to_json
p=JSON.parse(inv)
puts p[location]
I'm just getting an error like this
C:\Ruby24-x64\bin\ruby.exe -e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift) C:/Users/rtuz2th/.RubyMine2017.3/config/scratches/scratch.rb
C:/Users/rtuz2th/.RubyMine2017.3/config/scratches/scratch.rb:9:in `<top (required)>': undefined local variable or method `location' for main:Object (NameError)
from -e:1:in `load'
from -e:1:in `<main>'
Process finished with exit code 1
or an empty response. I'm trying to solve this for two days now, but I'm absolutely out of ideas. Thanks for your help in advance!

Answer 1

inv = inv.to_json
p = JSON.parse(inv)
The above is a noop. Use inv as is, it’s a hash already.
puts p[location]
You cannot just lookup whatever key located deeply in the tree hierarchy or you hash. You hash has stings as keys, it has a two top-level elements, 'pagination' and 'listings', the latter is an array, and each element of this array is a hash having location key.
While you were cutting the long value, you dropped the ending comma, making me unable to copy-paste the input and provide the exact answer.