I believe that for #errors to pass muster in active_record_helper, there needs to be three methods in Datamapper::Validate::ValidationErrors: 'on', 'full_messages' and 'count'. Of these three methods, the only one that is missing is 'count'.
http://github.com/datamapper/dm-more/blob/459fd82a8923d7bf9c3d6ce64ab5f4bba7b867dc/dm-validations/lib/dm-validations/validation_errors.rb In AR 'count' is an alias for 'size', which is a simple one-liner: http://api.rubyonrails.org/classes/ActiveRecord/Errors.html#M002504 # File vendor/rails/activerecord/lib/active_record/validations.rb, line 225 225: def size 226: @errors.values.inject(0) { |error_count, attribute| error_count + attribute.size } 227: end I'm not sure if there was a particular reason why 'count' was omitted from the DM implementation - Is it safe for me to add my own 'count' method along the lines of the 'size' method in AR or would this break something in DM? On Jun 20, 2:56 pm, Yehuda Katz <[email protected]> wrote: > Is #errors in 0.10 a simple Hash? It would need to duck-type like an AR > errors object to work. > -- Yehuda > > > > On Sat, Jun 20, 2009 at 11:39 AM, Hola <[email protected]> wrote: > > > In Rails, you add error messages to the view like so: > > > <% remote_form_for(mymodel) do |f| %> > > <%= f.error_messages %> > > > However, if mymodel is a Datamapper rather than an ActiveRecord model, > > it produces an error: > > > undefined method `count' for {}:Hash > > > At the moment I am addressing this unfortunately by removing the call > > to error_messages in the view. > > > Is there a better workaround? > > > This is the stack trace, in case it helps (I just updated to the > > latest 0.10 release candidate for all dm gems). > > > ---------------------------------------------------------------------------------------------------- > > > C:/Ruby18/lib/ruby/gems/1.8/gems/dm-validations-0.10.0/lib/dm- > > validations/validation_errors.rb:106:in `send' > > C:/Ruby18/lib/ruby/gems/1.8/gems/dm-validations-0.10.0/lib/dm- > > validations/validation_errors.rb:106:in `method_missing' > > C:/Ruby18/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_view/ > > helpers/active_record_helper.rb:179:in `error_messages_for' > > C:/Ruby18/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_view/ > > renderable.rb:77:in `inject' > > C:/Ruby18/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_view/ > > helpers/active_record_helper.rb:179:in `each' > > C:/Ruby18/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_view/ > > helpers/active_record_helper.rb:179:in `inject' > > C:/Ruby18/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_view/ > > helpers/active_record_helper.rb:179:in `error_messages_for' > > C:/Ruby18/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_view/ > > helpers/form_helper.rb:984:in `error_messages' > > -- > Yehuda Katz > Developer | Engine Yard > (ph) 718.877.1325 --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "DataMapper" 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/datamapper?hl=en -~----------~----~----~----~------~----~------~--~---
