module Doorkeeper::Models::Scopes

def includes_scope?(*required_scopes)
  required_scopes.blank? || required_scopes.any? { |scope| scopes.exists?(scope.to_s) }
end

def scopes
  OAuth::Scopes.from_string(scopes_string)
end

def scopes=(value)
  super Array(value).join(" ")
end

def scopes_string
  self[:scopes]
end