I am trying to create a json response that can be used to create a paging grid. Here is my controller code:
def grid_data start = (params[:start] || 1).to_i size = (params[:limit] || 20).to_i sort_col = (params[:sort] || 'id') sort_dir = (params[:dir] || 'ASC')
page = ((start/size).to_i)+1
@movie_pages = Paginator.new(self, Movie.count, size, page)
@movies = Movie.find(:all, :select => "id, title, plot, date, genre, mpaa, directed_by", :limit=>@movie_pages.items_per_page, :offset=>@movie_pages.current.offset, :order=>sort_col+' '+sort_dir)
return_data = Hash.new() return_data[:Total] = @movie_pages.item_count return_data[:Movies] = @movies.collect{ |u| {:id=>u.id, :title=>u.title, :plot=>u.plot, :date=>u.date, :genre=>u.genre, :mpaa=>u.mpaa, :directed_by=>u.directed_by} } render :json => return_data.to_json end
and I am getting an object references itself error with this stack trace:
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json.rb:39:in `raise_on_circular_reference' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json.rb:26:in `encode' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ core_ext/object/misc.rb:32:in `to_json' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json/encoders/core.rb:49 C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json/encoders/core.rb:49:in `map' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json/encoders/core.rb:49 C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json.rb:27:in `call' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json.rb:27:in `encode' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json.rb:42:in `raise_on_circular_reference' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json.rb:26:in `encode' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ core_ext/object/misc.rb:32:in `to_json' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json/encoders/core.rb:57 C:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/ base.rb:1940:in `map' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json/encoders/core.rb:54:in `each' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json/encoders/core.rb:54:in `map' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json/encoders/core.rb:54 C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ core_ext/object/misc.rb:23:in `returning' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json/encoders/core.rb:53 C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json.rb:27:in `call' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json.rb:27:in `encode' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json.rb:42:in `raise_on_circular_reference' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ json.rb:26:in `encode' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ core_ext/object/misc.rb:32:in `to_json' #{RAILS_ROOT}/app/controllers/movies_controller.rb:41:in `grid_data'
Any ideas? I am stumped.
