On 15 April 2011 11:08, seth shao <[email protected]> wrote: > I'm a new ruby, now i have a newbie problem > > I have three model > 1. > [code] > class SfProduct < ActiveRecord::Base > has_many :sf_actions_maps > def sf_add_user_to_action_map() > sf_actions_maps << SfProductMap.new() > end > end > [/code] > 2. > [code] > class SfProductMap < ActiveRecord::Base > belongs_to :sf_product > belongs_to :sf_user > [/code] > 3. > [code] > class SfUser < ActiveRecord::Base > has_many :sf_products_maps > [/code] > > product controller create code : > def create > @sf_product = SfProduct.new() > @sf_product.sf_add_user_to_action_map(@sf_user) > respond_to do |format| > if @sf_activity.save > > else > > end > end > > > afert user the create actions, the error will be show: > > You have a nil object when you didn't expect it! > You might have expected an instance of ActiveRecord::Base. > The error occurred while evaluating nil.delete
The error message should tell you which line of your code is failing. On that line you have probably used a variable that is nil. Possibly you have done a find and it has not found any records. If you can't see it post the whole error message and stack trace and the bit of code around the error. Colin -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
