lib/nanoc/base/entities/document.rb in nanoc-4.8.2 vs lib/nanoc/base/entities/document.rb in nanoc-4.8.3

@@ -13,11 +13,11 @@
       def attributes
         @attributes.value
       end
 
       # @return [Nanoc::Identifier]
-      attr_accessor :identifier
+      attr_reader :identifier
 
       # @return [String, nil]
       attr_accessor :checksum_data
 
       # @return [String, nil]
@@ -77,9 +77,14 @@
       # @abstract
       #
       # @return Unique reference to this object
       def reference
         raise NotImplementedError
+      end
+
+      contract C::Or[Nanoc::Identifier, String] => Nanoc::Identifier
+      def identifier=(new_identifier)
+        @identifier = Nanoc::Identifier.from(new_identifier)
       end
 
       contract C::None => String
       def inspect
         "<#{self.class} identifier=\"#{identifier}\">"