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Class: ActiveRecord::Associations::Preloader::Association::LoaderQuery

Relationships & Source Files
Inherits: Object
Defined in: activerecord/lib/active_record/associations/preloader/association.rb

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(scope, destination_key_name) ⇒ LoaderQuery

[ GitHub ] 

  


# File 'activerecord/lib/active_record/associations/preloader/association.rb', line 13



def initialize(scope, destination_key_name)
  @scope = scope
  @destination_key_name = destination_key_name
end


  







Instance Attribute Details



  

    #destination_key_name   (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/preloader/association.rb', line 11



attr_reader :scope, :destination_key_name


  








  

    #scope   (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/preloader/association.rb', line 11



attr_reader :scope, :destination_key_name


  







Instance Method Details



  

    #eql?(other)  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/preloader/association.rb', line 18



def eql?(other)
  destination_key_name == other.destination_key_name &&
    scope.table_name == other.scope.table_name &&
    scope.model.connection_specification_name == other.scope.model.connection_specification_name &&
    scope.values_for_queries == other.scope.values_for_queries
end


  








  

    #hash  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/preloader/association.rb', line 25



def hash
  [destination_key_name, scope.model.table_name, scope.model.connection_specification_name, scope.values_for_queries].hash
end


  








  

    #load_records_for_keys(keys, &block)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/preloader/association.rb', line 42



def load_records_for_keys(keys, &block)
  return [] if keys.empty?

  if destination_key_name.is_a?(Array)
    query_constraints = Hash.new { |hsh, key| hsh[key] = Set.new }
    keys.each_with_object(query_constraints) do |values_set, constraints|
      destination_key_name.each_with_index do |key_name, index|
        constraints[key_name] << values_set[index]
      end
    end

    scope.where(query_constraints)
  else
    scope.where(destination_key_name => keys)
  end.load(&block)
end


  








  

    #load_records_in_batch(loaders)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/preloader/association.rb', line 33



def load_records_in_batch(loaders)
  raw_records = records_for(loaders)

  loaders.each do |loader|
    loader.load_records(raw_records)
    loader.run
  end
end


  








  

    #records_for(loaders)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/associations/preloader/association.rb', line 29



def records_for(loaders)
  LoaderRecords.new(loaders, self).records
end