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class ActiveRecord::EagerLoadPolymorphicError

This error is raised when trying to eager load a polymorphic association using a JOIN. Eager loading polymorphic associations is only possible with ActiveRecord::Relation#preload.

Inherits From

Public class methods

new(reflection = nil)

Source code GitHub 
# File activerecord/lib/active_record/associations/errors.rb, line 244
def initialize(reflection = nil)
  if reflection
    super("Cannot eagerly load the polymorphic association #{reflection.name.inspect}")
  else
    super("Eager load polymorphic error.")
  end
end

Definition files