Convert Json structures(Json File) to Ruby hash - ruby-on-rails

Question

I have a JSON File which looks like:
{"business_id": "vcNAWiLM4dR7D2nwwJ7nCA", "full_address": "4840 E Indian School Rd\nSte 101\nPhoenix, AZ 85018", "hours": {"Tuesday": {"close": "17:00", "open": "08:00"}, "Friday": {"close": "17:00", "open": "08:00"}, "Monday": {"close": "17:00", "open": "08:00"}, "Wednesday": {"close": "17:00", "open": "08:00"}, "Thursday": {"close": "17:00", "open": "08:00"}}, "open": true, "categories": ["Doctors", "Health & Medical"], "city": "Phoenix", "review_count": 7, "name": "Eric Goldberg, MD", "neighborhoods": [], "longitude": -111.98375799999999, "state": "AZ", "stars": 3.5, "latitude": 33.499313000000001, "attributes": {"By Appointment Only": true}, "type": "business"}
{"business_id": "JwUE5GmEO-sH1FuwJgKBlQ", "full_address": "6162 US Highway 51\nDe Forest, WI 53532", "hours": {}, "open": true, "categories": ["Restaurants"], "city": "De Forest", "review_count": 26, "name": "Pine Cone Restaurant", "neighborhoods": [], "longitude": -89.335843999999994, "state": "WI", "stars": 4.0, "latitude": 43.238892999999997, "attributes": {"Take-out": true, "Good For": {"dessert": false, "latenight": false, "lunch": true, "dinner": false, "breakfast": false, "brunch": false}, "Caters": false, "Noise Level": "average", "Takes Reservations": false, "Delivery": false, "Ambience": {"romantic": false, "intimate": false, "touristy": false, "hipster": false, "divey": false, "classy": false, "trendy": false, "upscale": false, "casual": false}, "Parking": {"garage": false, "street": false, "validated": false, "lot": true, "valet": false}, "Has TV": true, "Outdoor Seating": false, "Attire": "casual", "Alcohol": "none", "Waiter Service": true, "Accepts Credit Cards": true, "Good for Kids": true, "Good For Groups": true, "Price Range": 1}, "type": "business"}
I want to to traverse this file and convert individual structures into a Ruby hash so that I can access the different hashes to perform actions on them.
This is a hash of the first structure of the JSON file:
{"business_id"=>"uUsfpN81JCMKyH6c0D0bTg", "full_address"=>"1910 Village Center Cir\nSte 6\nSummerlin\nLas Vegas, NV 89134", "hours"=>{}, "open"=>true, "categories"=>["Food", "Desserts", "Italian", "Pizza", "Restaurants"], "city"=>"Las Vegas", "review_count"=>6, "name"=>"Rocco's NY Pizza & Pasta", "neighborhoods"=>["Summerlin"], "longitude"=>-115.3041999, }
Similarly I want to have hashes of all other JSON structures. How can I do this in Ruby on Rails?

Answer 1

The file you got it's not a JSON file, but simply a text file with a bunch of JSON-encoded objects. Simply loop over the lines.
require 'json'
File.read("file.txt").split("\n").each do |line|
JSON.parse(line)
end
or use .map instead of .each if you want return an Array of Hash.
File.foreach("file.txt").map do |line|
JSON.parse(line)
end
File.read("file.txt").split("\n").map do |line|
JSON.parse(line)
end
Also note this has nothing to do with Rails, it's pure Ruby code.

Answer 2

Something like this will return an array of hashes retrieved from the file:
require 'json'
array_of_hashes = File.foreach('file.txt').map{ |l| JSON[l] }
Be warned though, this isn't scalable because you'll be pulling the entire file into memory, and if that resulting array is larger than the available space you'll see your program go to a crawl.
A more scalable approach would be to read each line, convert it to a Ruby object using JSON's parser, then immediately stuff the resulting object into a database record, and finally iterate over the database to do your massaging. SQLite3, PostgreSQL, MySQL would all be reasonable choices for this.

Answer 3

Have you tried JSON.parse
require 'json'
JSON.parse(your_json) #=> your expected result