Change changes_attributes keys symbol to string.

[hotchpotch]

because ActiveModel's changes_attributes keys are string.

> ar_model_object.changed_attributes
=> {"title"=>"example"}

[karmi]

Thanks, there's already #140 opened for that. AFAIK, ActiveRecord::Base returns it as Symbols, need to dig into it, to see the different implementations across ActiveRecord, ActiveModel, Mongoid, etc.

[hotchpotch]

I see, thanks!

elasticsearch-ruby/rails is very useful 😄

[karmi]

@hotchpotch Let's keep this open, the issue still stands :)

[hotchpotch]

@karmi sorry, I understand.

[karmi]

@hotchpotch Apologies!, this has been actually implemented in f68505e, I totally forgot about this patch... Thanks again for catching it and submitting the pull request!

[hotchpotch]

@karmi Thank you for your implementation 😀 !