Question

I’m attempting to create a custom validation for one of my models in Rails 2.3.5, but I keep recieving the following error everytime I run my testing suite:

`method_missing_without_paginate': undefined local variable or method `validates_progression'

app/models/project.rb

class Project < ActiveRecord::Base
   ...
   validates_progression

   def validates_progression
      true # stubtastic!
   end
end

I can’t seem to make much of this~

Answer 1

It doesn’t work because you are defining a method with instance scope and you are trying to call it within the class scope. You have two alternatives:

Instance Scope

class Project < ActiveRecord::Base

  validate :validates_progression

  def validates_progression
     true # stub
  end

end

Class scope

class Project < ActiveRecord::Base

  def self.validates_progression
     true # stub
  end

  # Be sure to define this method before calling  it
  validates_progression

end

The second alternative doesn’t really makes sense unless you want to wrap an other filter.

class Project < ActiveRecord::Base

  def self.validates_progression
     validates_presence_of :progression
     validates_length_of ...
  end

  # Be sure to define this method before calling  it
  validates_progression

end

Otherwise, go with the first solution.