module ActiveRecordShards::DefaultReplicaPatches::Rails41HasAndBelongsToManyBuilderExtension

in rails 4.1+, they create a join class that's used to pull in records for HABTM. this simplifies the hell out of our existence, because all we have to do is inerit on-replica-by-default down from the parent now.

Public Class Methods

included(base) click to toggle source
# File lib/active_record_shards/default_replica_patches.rb, line 166
def self.included(base)
  base.class_eval do
    alias_method :through_model_without_inherit_default_replica_from_lhs, :through_model
    alias_method :through_model, :through_model_with_inherit_default_replica_from_lhs
  end
end

Public Instance Methods

through_model_with_inherit_default_replica_from_lhs() click to toggle source
# File lib/active_record_shards/default_replica_patches.rb, line 173
def through_model_with_inherit_default_replica_from_lhs
  model = through_model_without_inherit_default_replica_from_lhs
  def model.on_replica_by_default?
    left_reflection.klass.on_replica_by_default?
  end

  # also transfer the sharded-ness of the left table to the join model
  model.not_sharded unless model.left_reflection.klass.is_sharded?
  model
end