Module: EagerGroup::ClassMethods

Defined in:
lib/eager_group.rb

Instance Method Summary collapse

Instance Method Details

#add_eager_group_definition(ar, definition_name, definition) ⇒ Object

mattr_accessor :eager_group_definitions, default: {}



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# File 'lib/eager_group.rb', line 22

def add_eager_group_definition(ar, definition_name, definition)
  ar.eager_group_definitions = self.eager_group_definitions.except(definition_name).merge!(definition_name => definition)
end

#define_definition_accessor(definition_name) ⇒ Object 



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# File 'lib/eager_group.rb', line 35

def define_definition_accessor(definition_name)
  define_method definition_name,
                lambda { |*args|
                  query_result_cache = instance_variable_get("@#{definition_name}")
                  return query_result_cache if args.blank? && query_result_cache.present?

                  preload_eager_group(definition_name, *args)
                  instance_variable_get("@#{definition_name}")
                }

  define_method "#{definition_name}=" do |val|
    instance_variable_set("@#{definition_name}", val)
  end
end

#define_eager_group(attr, association, aggregate_function, column_name, scope = nil) ⇒ Object

class Post

define_eager_group :comments_avergage_rating, :comments, :average, :rating
define_eager_group :approved_comments_count, :comments, :count, :*, -> { approved }

end



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# File 'lib/eager_group.rb', line 30

def define_eager_group(attr, association, aggregate_function, column_name, scope = nil)
  add_eager_group_definition(self, attr, Definition.new(association, aggregate_function, column_name, scope))
  define_definition_accessor(attr)
end