module ActiveRecord::Associations::Builder
This is the parent Association class which defines the variables used by all associations.
The hierarchy is defined as follows:
Association
  - SingularAssociation
    - BelongsToAssociation
    - HasOneAssociation
  - CollectionAssociation
    - HasManyAssociation
 This class is inherited by the has_one and belongs_to association classes
    © 2004–2018 David Heinemeier Hansson
Licensed under the MIT License.