Question

I have the following structure :

a = { 'x' => [1,2,3] }

In Rails 3.0 with ruby 1.8, the conversion to JSON works as expected :

a.to_json

=> “{\”x\”:[1,2,3]}”

In Rails 3.1 with ruby 1.9.3p125, the array is transformed into a hash :

a.to_json

=> “{\”x\”:{\”1\”:null,\”2\”:null,\”3\”:null}}”

I can’t find any documentation explaining the difference in behaviour between the two versions, nor any way to preserve the expected output in Rails 3.1. Any clues ?

Answer 1

The problem is actually related to one of the gems installed on the Gemfile, which returns an incorrect result for to_json calls.

Thanks for the help.