Dynamically call model methods to chain includes

gistfile1.rb

## Customer.rb	

def self.references
  includes(:account)
end
	
def self.forms
  includes(:forms)
end

def self.conditionally_include
  hash = { :references => true, :locations => false, :forms => false }
  hash.each do |k, v|
    self.send(k) if v
  end
end

## in rails console:
Customer.conditionally_include
=> {:references=>true}

but if I call this instead:
Customer.send(:references)

it runs the proper queries on Customer and eagerly loads references