Rails Ruby on Rails

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  Sean August 10th, 2010 @ 09:04 PM

  The reason this is a problem is that if you have scopes in a parent class that you're calling from a couple of different child classes, you may need to perform an action based on the class that called the scope.

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  Sean August 10th, 2010 @ 09:23 PM

  Sorry, I forgot to specify, this is on Rails3 (RC)

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  Henrik Hodne August 11th, 2010 @ 01:12 AM

  I can confirm that this is reproducible. However, I think this is due to Ruby evaluating self as you create the proc, and not when the proc is called. So, I think this is intentional, and at least not a rails problem.

  This sortof does what AR::Base.scope() does, at least when it comes to defining methods.

  module Kernel
    def singleton_class
      class << self
        self
      end
    end unless respond_to?(:singleton_class)
  end
  
  class A
    def self.define_scope(name, block)
      singleton_class.send(:define_method, name) do
        ret = block.call()
        ret
      end
    end
  
    define_scope(:test_two, lambda { self.to_s })
  
    def to_s
      'A'
    end
  end
  
  block = lambda { self.to_s }
  
  A.define_scope(:test_scopey, block)
  
  class B < A
    def to_s
      'B'
    end
  end
  
  A.test_scopey # => "main"
  B.test_scopey # => "main"
  
  A.test_two # => "A"
  B.test_two # => "A"
  

• 

  Santiago Pastorino February 2nd, 2011 @ 05:00 PM

  • State changed from “new” to “open”

  This issue has been automatically marked as stale because it has not been commented on for at least three months.

  The resources of the Rails core team are limited, and so we are asking for your help. If you can still reproduce this error on the 3-0-stable branch or on master, please reply with all of the information you have about it and add "[state:open]" to your comment. This will reopen the ticket for review. Likewise, if you feel that this is a very important feature for Rails to include, please reply with your explanation so we can consider it.

  Thank you for all your contributions, and we hope you will understand this step to focus our efforts where they are most helpful.

• 

  Santiago Pastorino February 2nd, 2011 @ 05:00 PM

  • State changed from “open” to “stale”

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  klkk May 23rd, 2011 @ 03:08 AM

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