Rails Ruby on Rails

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  Samuel Kadolph August 31st, 2010 @ 02:25 PM

  The helpers are checking if the object responds_to?(:message) now which returns false. OpenStruct uses method_missing to add new attributes unless you specify them in new then it generates accessor methods.

  <%= form_for OpenStruct.new(:message => ''), :url => ... do |f| %>
    <%= f.text_field :message %>
  <% end %>
  

  Works fine.

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  bhf August 31st, 2010 @ 04:32 PM

  That's what i needed for lipodrene course too!

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  Lars Kuhnt August 31st, 2010 @ 05:57 PM

  Thanks Samuel, but I was wondering why rails 3 forces me to define the attributes specifically. If the object does not respond to the called method, an undefined method error is raised anyhow. So whats the point in calling respond_to in the form helper?

  Anyway, I fixed it by monkey-patching OpenStruct#respond_to?

  # config/initializers/open_struct_extensions.rb
  
  class OpenStruct
  
    def respond_to?(symbol, include_private = false)
      true
    end
  
  end
  

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  Samuel Kadolph August 31st, 2010 @ 06:23 PM

  • Assigned user set to “Santiago Pastorino”

  The code was changed to check for method_name and method_name + '_before_type_cast otherwise raise an exception in this commit:

  Make InstanceTagMethods#value_before_type_cast raise if the model don't respond to attr_before_type_cast or attr method

  
  

  The commit was to solve these two tickets:

  1. text_field() does not use overridden model accessors
     
  2. FormHelper problem with write-only fields

  Maybe Santiago can provide some insight.

• 

  Santiago Pastorino September 1st, 2010 @ 02:49 AM

  • State changed from “new” to “wontfix”
  • Importance changed from “” to “Low”

  You should check this whole thread https://rails.lighthouseapp.com/projects/8994/tickets/5471 and let me know if you have more concerns

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  Lars Kuhnt September 1st, 2010 @ 09:06 AM

  Thanks for the effort and clarification.

  Maybe OpenStruct should override respond_to? like above because it responds to all methods, but that does not belong here.