Rails Ruby on Rails

Comments and changes to this ticket

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  Ivan Konyshev August 23rd, 2010 @ 01:16 AM

  After all it was mistake in my RatingCriteria definition.. Error message is completely misunderstandable.
  ArgumentError was swallowed and uninitialized constant error generated with name of first candidate.

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  Ivan Konyshev August 23rd, 2010 @ 01:18 AM

  • Title changed from “Error in ActiveRecord::Base compute_type method” to “It's hard to understand errors generated by ActiveRecord::Base compute_type method”
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  Andrew White August 23rd, 2010 @ 12:35 PM

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

  The error message is the same as you would get with pure ruby:

  #!/usr/bin/ruby
  
  class Category
    def build
      RatingCriteria.new
    end
  end
  
  Category.new.build
  >> uninitialized constant Category::RatingCriteria (NameError)
  

  The rescue for ArgumentError is there because constantize can raise one in certain circumstances but the correct class will eventually be found. The error message can't specifically refer to setting :class_name for an association as it's used elsewhere as well (e.g. STI).