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# File 'lib/roles-field.rb', line 11
def roles_field(field, options={})
roles = options[:roles]
class_eval %(
def roles=(roles)
self.#{field} = (#{roles} & roles).map { |role|
2 ** #{roles}.index(role.to_sym)
}.sum
end
def roles
#{roles}.reject { |role|
((#{field} || 0) & 2 ** #{roles}.index(role.to_sym)).zero?
}
end
def role?(role)
roles.include? role.to_sym
end
def role=(role)
self.roles = (#{roles} & [role.to_sym])
end
def set_role(role)
self.role = role
end
scope :with_role, lambda { |role|
{
:conditions => ['#{field} & ? > 0', 2 ** #{roles}.index(role.to_sym)]
}
}
)
roles.each do |role|
define_method "is_#{role}?" do
role? role
end
end
end
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