Hi, Rails 2.3.5 Any ideas on the following error when calling create on an ActiveRecord object? NoMethodError (You have a nil object when you didn''t expect it! You might have expected an instance of Array. The error occurred while evaluating nil.clear): The create method is inside a Module that I want each of my Model classes to include. All of my DB tables follow the same structure, so I am trying to factor out the updating and searching of the tables to just a few Modules. My DB structure should allow it with a little clever coding. (Note: just finished reading Metaprogramming Ruby from PragProg. It has taught me a fair bit (still loads more to learn I guess), but I now want to refactor a current project as far as I can as a learning excercise). If I include the Modules in the Controllers so that each Controller gets all the functionality of the Modules, then the Controllers act ''on'' the Model Classes and the create method succeeds, but when I move the Module to the Model, which is where it should really be so that the Model Class gets the methods itself, I get this error. Have I missed something with ''self''? The Class that calls create does exist, and the params passed to create are correct. (More info available if required to help fix) Many Thanks Paul -- 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 rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
On 23 February 2010 23:49, paul h <paul-nqL44GTounsJ3nxcUk3PyQ@public.gmane.org> wrote:> NoMethodError (You have a nil object when you didn''t expect it! > You might have expected an instance of Array. > The error occurred while evaluating nil.clear):If you post code extracts from around the area that seems to be failing, we might be able to help.> Have I missed something with ''self''?I''ve no idea, that''s the first time you''ve mentioned it, so we don''t know what kind of grasp you think you have to be able to suggest anything you may have missed.> just finished reading Metaprogramming RubyThat might be a little bit beyond the position you''re at at the moment, maybe a book that offers a better grounding would be more appropriate; like "Ruby for Rails" (http://www.manning.com/black/) -- 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 rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
Thanks for the reply, but figured it out. I didn''t give much helpful info, I know, it was the nil.clear that I couldn''t find any info on anywhere, spent ages searching and was hoping it might just twig something with someone. The problem was, I was overwriting model methods I shouldn''t with one of my modules. I understand OO, MVC, and don''t intend to continue writing, what was basically, a bunch of boiler plate code in my models due to the DB tables following the same formats, so I am refactoring with the help of Metaprogramming Ruby (after having spent a lot of time with AWDwR and Pickaxe + a few others). It has taught me a lot about Ruby, and has helped me reduce masses of lines of code into just a few small modules - just got caught by unknowingly MonkeyPatching. Thanks again Paul On Feb 24, 9:08 am, Michael Pavling <pavl...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> On 23 February 2010 23:49, paul h <p...-nqL44GTounsJ3nxcUk3PyQ@public.gmane.org> wrote: > > > NoMethodError (You have a nil object when you didn''t expect it! > > You might have expected an instance of Array. > > The error occurred while evaluating nil.clear): > > If you post code extracts from around the area that seems to be > failing, we might be able to help. > > > Have I missed something with ''self''? > > I''ve no idea, that''s the first time you''ve mentioned it, so we don''t > know what kind of grasp you think you have to be able to suggest > anything you may have missed. > > > just finished reading Metaprogramming Ruby > > That might be a little bit beyond the position you''re at at the > moment, maybe a book that offers a better grounding would be more > appropriate; like "Ruby for Rails" (http://www.manning.com/black/)-- 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 rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.