Well, I don't see anything wrong. stmt 44 in Expense controller creates new Expense instance passing it the content of the :expense item in the params hash, which is displayed in detail in the crash output.
The :expense item is itself a hash of all the values enter in the New Expense form. In particular, the vendor string key has the value string 65, which is indeed the vendor I select from the drop-down. I restarted Mongrel with the --debugger argument, and Mongrel confirmed that the debugger is enabled. I then put a debugger statement immediately ahead of the offending statement, which thus became line# 45. However, when I refreshed the program in Firefox, the crash output still claimed that it crashed on line 44 (the debugger statement). But the command widow where I started Mongrel seemed to indicated that the app was stopped on line 45. I issues "p params" in the command window and got the same display (except less neatly) as the hash I got in the crash dump. Give all that, I still have no idea why the app crashed. Do you have any idea? Best wishes, Richard On Jul 17, 4:33 pm, Colin Law <clan...@googlemail.com> wrote: > On 17 July 2010 15:50, RichardOnRails > > > > <richarddummymailbox58...@uscomputergurus.com> wrote: > > Hi All, > > > I got closer. I tried: > > > <% @vendors = Vendor.find( :all, :order=>"nickname ASC") -%> > > <%= f.collection_select(:vendor, @vendors, :id, :nickname) %> > > > I ran the app and created a new expense. I clicked the drop-down list, > > selected a vendor, populated the remaining fields of the form and > > saved the expense. The app then crashed (that's the bad part), *but* > > the Request parameters were perfect, specifically: > > "vendor"=>"64" > > > So I saw the selected vendor's name when I clicked Save/Submit/ > > whatever and the generated expense record contained the id of the > > selected vendor, not the name of that vendor, as had been the case in > > some earlier versions of my code. > > > Below are some details of this crash. > > > Thanks for any help you may offer in resolving this matter. > > -- > > Richard > > > ActiveRecord::AssociationTypeMismatch in ExpensesController#create > > > Vendor(#37038620) expected, got String(#21132310) > > It is always worth while trying to understand error messages, quite > often they can give you a clue as the problem. The error above says > that a Vendor object was expected, but you have given it a string. > From the trace below you can see that it is at line 44 of > expenses_controller.rb. Have a look at that line and see if you can > work out why it is expecting a Vendor object, see what you have > actually provided and see if you understand what is going on. > > Colin > > > > > RAILS_ROOT: K:/_Projects/Ruby/_Rails_Apps/_EIMS/RTS > > Application Trace | Framework Trace | Full Trace > > > K:/_Utilities/ruby186-26_rc2/ruby/lib/ruby/gems/1.8/gems/ > > activerecord-2.3.5/lib/active_record/associations/association_proxy.rb: > > 262:in `raise_on_type_mismatch' > > K:/_Utilities/ruby186-26_rc2/ruby/lib/ruby/gems/1.8/gems/ > > activerecord-2.3.5/lib/active_record/associations/ > > belongs_to_association.rb:22:in `replace' > > K:/_Utilities/ruby186-26_rc2/ruby/lib/ruby/gems/1.8/gems/ > > activerecord-2.3.5/lib/active_record/associations.rb:1281:in `vendor=' > > K:/_Utilities/ruby186-26_rc2/ruby/lib/ruby/gems/1.8/gems/ > > activerecord-2.3.5/lib/active_record/base.rb:2746:in `send' > > K:/_Utilities/ruby186-26_rc2/ruby/lib/ruby/gems/1.8/gems/ > > activerecord-2.3.5/lib/active_record/base.rb:2746:in `attributes=' > > K:/_Utilities/ruby186-26_rc2/ruby/lib/ruby/gems/1.8/gems/ > > activerecord-2.3.5/lib/active_record/base.rb:2742:in `each' > > K:/_Utilities/ruby186-26_rc2/ruby/lib/ruby/gems/1.8/gems/ > > activerecord-2.3.5/lib/active_record/base.rb:2742:in `attributes=' > > K:/_Utilities/ruby186-26_rc2/ruby/lib/ruby/gems/1.8/gems/ > > activerecord-2.3.5/lib/active_record/base.rb:2438:in `initialize' > > K:/_Projects/Ruby/_Rails_Apps/_EIMS/RTS/app/controllers/ > > expenses_controller.rb:44:in `new' > > K:/_Projects/Ruby/_Rails_Apps/_EIMS/RTS/app/controllers/ > > expenses_controller.rb:44:in `create' > > > On Jul 17, 9:24 am, RichardOnRails > > <richarddummymailbox58...@uscomputergurus.com> wrote: > >> Hi Fred, > > >> Thanks for taking the trouble to respond again, especially since I > >> failed to follow your previous response. The problem then was that I > >> was unsuccessful in applying it or didn't understand it ... probable > >> both. I definitely failed to realize that the argument (object) was > >> to be omitted in the context of form elements. That "little detail" > >> seems missing in ActionView::Helpers::FormOptionsHelper. Someone > >> explicitly mentioned that in a subsequent post on this thread. > > >> Sadly, when I followed your suggestion "to the letter", I was > >> unsuccessful again. I've got: > >> ====== Error Msg ========= > >> NameError in Expenses#new > > >> Showing app/views/expenses/new.html.erb where line #13 raised: > > >> undefined local variable or method `vendor_id' for #<ActionView::Base: > >> 0x4822310> > > >> Extracted source (around line #13): > > >> 10: > >> 11: <%# New version of vendor selection -%> > >> 12: <% @vendors = Vendor.find( :all, :order=>"nickname ASC") -%> > >> 13: <%= f.collection_select(vendor_id, @vendors, :id, :nickname) > >> %> > >> 14: <%# End of New version -%> > >> [snip] > >> ====== Error Msg ========= > > >> So I tested whether vendor_id would be defined if I created an Expense > >> instance in Rails console: Here's what I got (edited for brevity): > >> K:\_Projects\Ruby\_Rails_Apps\_EIMS\RTS>ruby script/console > >> Loading development environment (Rails 2.3.5)>> expense = Expense.new > > >> => #<Expense id: nil, vendor: nil, description: nil, category: nil, > >> [snip] > > >> >> expense.vendor_id [NoMethodError] > >> >> Expense.vendor_id [NoMethodError] > >> >> params[:vendor_id] [NameError] > > >> I also tried using the symbol :vendor_id as the first arg. That > >> failed, too. > > >> I apologize for being so obtuse. But I'd really like to get this app > >> working, and getting this expense-vendor hookup working may be my > >> last obstacle (for a while, anyway). > > >> If you can give me a little more help about this problem, I'd be most > >> appreciative. If you need more info, I'd be happy to post portions > >> or all my code to a website from which you could download it for > >> inspection. > > >> Best wishes, > >> Richard > > >> On Jul 17, 5:29 am, Frederick Cheung <frederick.che...@gmail.com> > >> wrote: > > >> > On Jul 16, 10:40 pm, RichardOnRails > > >> > <richarddummymailbox58...@uscomputergurus.com> wrote: > >> > > Hey Colin, > > >> > > Here's one more detail I should have added from my new-expense-view > >> > > code: > > >> > > <%= f.label :vendor %><br /> > > >> > > <%# New version of vendor selection -%> > >> > > <% params[:expense] = 10 -%> > >> > > <% @vendors = Vendor.find( :all, :order=>"nickname ASC") -%> > >> > > <%= f.collection_select(:id, @vendors, :id, :nickname) %> > > >> > because the first argument should be the name of the attribute you are > >> > trying to set (ie vendor_id). This and f.collection_select not needing > >> > the first argument was on the link I gave on one of your other posts > >> > (http://guides.rubyonrails.org/form_helpers.html) > > >> > Fred > > >> > > <%# End of New version -%> > > >> > > I apologize for the fragmented response. I was in a hurry to go out > >> > > for my 3-mile walk :-) > > >> > > Best again, > >> > > Richard > > > -- > > 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-t...@googlegroups.com. > > To unsubscribe from this group, send email to > > rubyonrails-talk+unsubscr...@googlegroups.com. > > For more options, visit this group > > athttp://groups.google.com/group/rubyonrails-talk?hl=en. -- 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-t...@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
