Class: JsonApiModel::Associations::Preloader

Inherits:
Object
  • Object
show all
Defined in:
lib/json_api_model/associations/preloader.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(objects, preloads) ⇒ Preloader

Returns a new instance of Preloader.



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# File 'lib/json_api_model/associations/preloader.rb', line 13

def initialize( objects, preloads )
  @objects  = Array( objects ).compact
  @preloads = preloads

  validate_homogenity!
end

Instance Attribute Details

#objects ⇒ Object

Returns the value of attribute objects.



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# File 'lib/json_api_model/associations/preloader.rb', line 11

def objects
  @objects
end

#preloads ⇒ Object

Returns the value of attribute preloads.



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# File 'lib/json_api_model/associations/preloader.rb', line 11

def preloads
  @preloads
end

Class Method Details

.preload(objects, *preloads) ⇒ Object 



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# File 'lib/json_api_model/associations/preloader.rb', line 6

def preload( objects, *preloads )
  new( objects, preloads ).preload
end

Instance Method Details

#preload ⇒ Object 



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# File 'lib/json_api_model/associations/preloader.rb', line 20

def preload
  @preloads.each do | preload |
    case preload
    when Hash
      preload.each do | preload, subpreloads |
        preloader = Preloaders.preloader_for( @objects, preload )

        subobjects = preloader.load
        preloader.assign subobjects

        subobjects.preload( subpreloads )
      end
    else
      Preloaders.preloader_for( @objects, preload ).fetch
    end
  end

  @objects
end