lib/active_object/hash.rb in active_object-5.2.3 vs lib/active_object/hash.rb in active_object-5.2.4

@@ -129,9 +129,19 @@
       hash = {}
       keys.flatten.each { |key| hash[key] = self[key] if key?(key) }
       replace(hash)
     end
 
+    def only_fill(*keys, placeholder: nil)
+      dup.only_fill!(*keys, placeholder: placeholder)
+    end
+
+    def only_fill!(*keys, placeholder: nil)
+      hash = {}
+      keys.flatten.each { |key| hash[key] = key?(key) ? self[key] : placeholder }
+      replace(hash)
+    end
+
     def pair?(key, value)
       self[key] == value
     end
 
     def promote(key)