Module ActiveRecord::Associations::Builder
In: lib/active_record/associations/builder/collection_association.rb
lib/active_record/associations/builder/has_and_belongs_to_many.rb
lib/active_record/associations/builder/has_one.rb
lib/active_record/associations/builder/has_many.rb
lib/active_record/associations/builder/association.rb
lib/active_record/associations/builder/singular_association.rb
lib/active_record/associations/builder/belongs_to.rb

[Validate]