Hi All,
I have had this problem with Rails 3 and 1.9.1. The fix for this error
is to add to_a to the json call.
render :json => {:top => @top.to_a.as_json(:only => [:id, :title ] ) }
Hope this helps.
Huet
On Aug 3, 8:01 am, Conrad Taylor <[email protected]> wrote:
> On Mon, Aug 2, 2010 at 2:26 PM, wprater <[email protected]> wrote:
> > Here is my model and an attempt to convert to json. Whether there is
> > data returned or not, a circular reference error is thrown. How can I
> > avoid this?
>
> wprater, I would recommend trying Rails 3 RC by doing the following:
>
> gem install rails --pre
>
> Also, if you don't have a requirement to use Ruby 1.8.7, I would recommend
> using Ruby 1.9.2 RC2 by doing the following:
>
> rvm install 1.9.2
>
> Ryan Bates recently added the following screencast which covers the
> installation
> of both Rails 3 and Ruby 1.9.2.
>
> http://media.railscasts.com/videos/225_upgrading_to_rails_3_part_1.mov
>
> Good luck,
>
> -Conrad
>
>
>
> > ruby-1.8.7-p249 > PayPeriod
> > => PayPeriod(id: integer, start_date: date, end_date: date, pay_date:
> > date)
> > ruby-1.8.7-p249 > PayPeriod.where('end_date < ?', Time.now)
> > => []
> > ruby-1.8.7-p249 > PayPeriod.where('end_date < ?', Time.now).to_json
> > ActiveSupport::JSON::Encoding::CircularReferenceError: object
> > references itself
> > from /Users/wprater/.rvm/gems/ruby-1.8.7-p249/gems/
> > activesupport-3.0.0.beta4/lib/active_support/json/encoding.rb:59:in
> > `check_for_circular_references'
>
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