Hi there,
I am fairly new to the Rails framework, so forgive me if there is an obvious solution to this problem.
I am using Rails 2.1.0 and trying to jsonify a hash containing an array. E.g.
result = { :name => "McLovin", :attachments => ['file.pdf', 'file.jpg'] }
=> {:attachments=>["file.pdf", "file.jpg"], :name=>"McLovin"}
result.to_json
I would expect something like:
{ "name": "McLovin", "attachments": [ "file.pdf", "file.jpg" ] }
But instead I get:
TypeError: wrong argument type Hash (expected Data) from /Library/Ruby/Gems/1.8/gems/activesupport-2.1.0/lib/ active_support/json/encoding.rb:21:in `to_json' from /Library/Ruby/Gems/1.8/gems/activesupport-2.1.0/lib/ active_support/json/encoding.rb:21:in `send' from /Library/Ruby/Gems/1.8/gems/activesupport-2.1.0/lib/ active_support/json/encoding.rb:21:in `encode' from /Library/Ruby/Gems/1.8/gems/activesupport-2.1.0/lib/ active_support/json/encoding.rb:31:in `raise_on_circular_reference' from /Library/Ruby/Gems/1.8/gems/activesupport-2.1.0/lib/ active_support/json/encoding.rb:20:in `encode' from /Library/Ruby/Gems/1.8/gems/activesupport-2.1.0/lib/ active_support/json/encoders/hash.rb:42:in `to_json' from /Library/Ruby/Gems/1.8/gems/activesupport-2.1.0/lib/ active_support/json/encoders/hash.rb:41:in `map' from /Library/Ruby/Gems/1.8/gems/activesupport-2.1.0/lib/ active_support/json/encoders/hash.rb:41:in `to_json' from /Library/Ruby/Gems/1.8/gems/activesupport-2.1.0/lib/ active_support/core_ext/object/misc.rb:28:in `returning' from /Library/Ruby/Gems/1.8/gems/activesupport-2.1.0/lib/ active_support/json/encoders/hash.rb:40:in `to_json' from (irb):54
If I do "result.to_json( :except => :attachments )", then it works.
Best regards, Mads Kristiansen
