Ruby JSON parse changes Hash keys

by

The JSON generator converts symbols to strings because JSON does not support symbols. Since JSON keys are all strings, parsing a JSON document will produce a Ruby hash with string keys by default.

You can tell the parser to use symbols instead of strings by using the symbolize_names option.

Example:

original_hash = {:info => [{:from => "Ryan Bates", :message => "sup bra", :time => "04:35 AM"}]}
serialized = JSON.generate(original_hash)
new_hash = JSON.parse(serialized, {:symbolize_names => true})

new_hash[:info]
 #=> [{:from=>"Ryan Bates", :message=>"sup bra", :time=>"04:35 AM"}]

Reference: http://www.ruby-doc.org/stdlib-1.9.3/libdoc/json/rdoc/JSON.html#method-i-parse

Related Contents:

  1. How to “pretty” format JSON output in Ruby on Rails
  2. How to convert a ruby hash object to JSON?
  3. How do I parse JSON with Ruby on Rails? [duplicate]
  4. How to replace a hash key with another key
  5. Equivalent of .try() for a hash to avoid “undefined method” errors on nil? [duplicate]
  6. Removing all empty elements from a hash / YAML?
  7. In Rails, how do you render JSON using a view?
  8. what is the best way to convert a json formatted key value pair to ruby hash with symbol as key?
  9. Rails mapping array of hashes onto single hash
  10. How do I loop over a hash of hashes?
  11. Embedding JSON Data into YAML file
  12. How to change hash keys from `Symbol`s to `String`s?
  13. How do I fetch multiple hash values at once?
  14. How can I replace a hash key with another key?
  15. How to elegantly symbolize_keys for a ‘nested’ hash
  16. How to convert a Ruby object to JSON
  17. (JSON::ParserError) “{N}: unexpected token at ‘alihack
  18. Rails Object Relationships and JSON Rendering
  19. How to get a random number in Ruby
  20. Remove duplicate elements from array in Ruby
  21. Case statement with multiple values in each ‘when’ block
  22. Deleting all records in a database table
  23. What is the difference between pluck and collect in Rails?
  24. What is mattr_accessor in a Rails module?
  25. How do I run a Ruby file in a Rails environment?
  26. Rails 4: How to reset test database?
  27. If string is empty then return some default value
  28. What are the WordPress alternatives for Ruby on Rails? [closed]
  29. Rails: Update model attribute without invoking callbacks
  30. What’s the best way to use SOAP with Ruby?
  31. Rails – Best-Practice: How to create dependent has_one relations
  32. Manually Retry Job in Delayed_job
  33. Rspec Output Format: Documentation
  34. Static pages in Ruby on Rails
  35. Call method only if it exists
  36. ActiveRecord how to ignore pending migrations
  37. Looking for suggestions for building a secure REST API within Ruby on Rails
  38. Rails, How to render a view/partial in a model
  39. Rails 4 Unpermitted Parameters for Array
  40. Add nullable foreign key in Rails
  41. How do I force ActiveRecord to reload a class?
  42. Undefined instance method “respond_to” in Rails 5 API Controller
  43. Can’t find libcurl or curl/curl.h (RuntimeError)
  44. Rails POST, PUT, GET
  45. How to convert array of ActiveRecord models to CSV?
  46. How to filter parameters in rails?
  47. In Ruby what does “=>” mean and how does it work? [duplicate]
  48. What’s the difference between Ruby and JRuby? [closed]
  49. is Rails.cache purged between tests?
  50. How to generate a random date in Ruby?

Leave a Comment