app/models/journaled/change_definition.rb in journaled-2.0.0.alpha1 vs app/models/journaled/change_definition.rb in journaled-2.0.0.rc1

@@ -1,8 +1,24 @@
 class Journaled::ChangeDefinition
   attr_reader :attribute_names, :logical_operation
 
   def initialize(attribute_names:, logical_operation:)
-    @attribute_names = attribute_names
+    @attribute_names = attribute_names.map(&:to_s)
     @logical_operation = logical_operation
+    @validated = false
+  end
+
+  def validated?
+    @validated
+  end
+
+  def validate!(model)
+    nonexistent_attribute_names = attribute_names - model.class.attribute_names
+    raise <<~ERROR if nonexistent_attribute_names.present?
+      Unable to persist #{model} because `journal_changes_to, as: #{logical_operation.inspect}`
+      includes nonexistant attributes:
+
+        #{nonexistent_attribute_names.join(', ')}
+    ERROR
+    @validated = true
   end
 end