Method: ActiveRecord::Reflection::ThroughReflection#collect_join_chain

Defined in:
activerecord/lib/active_record/reflection.rb

#collect_join_chain ⇒ Object

Returns an array of reflections which are involved in this association. Each item in the array corresponds to a table which will be part of the query for this association.

The chain is built by recursively calling #chain on the source reflection and the through reflection. The base case for the recursion is a normal association, which just returns

self

as its #chain.

class Post < ActiveRecord::Base
  has_many :taggings
  has_many :tags, through: :taggings
end

tags_reflection = Post.reflect_on_association(:tags)
tags_reflection.chain
# => [<ActiveRecord::Reflection::ThroughReflection: @delegate_reflection=#<ActiveRecord::Reflection::HasManyReflection: @name=:tags...>,
      <ActiveRecord::Reflection::HasManyReflection: @name=:taggings, @options={}, @active_record=Post>]



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# File 'activerecord/lib/active_record/reflection.rb', line 834

def collect_join_chain
  collect_join_reflections [self]
end