app/models/ddr/batch/batch_object_attribute.rb in ddr-batch-2.0.0.alpha.2 vs app/models/ddr/batch/batch_object_attribute.rb in ddr-batch-2.0.0.alpha.3

@@ -14,16 +14,25 @@
 
     VALUE_TYPES = [ VALUE_TYPE_STRING ]
 
     validates :operation, inclusion: { in: OPERATIONS }
     validates :datastream, presence: true
+    validate :valid_datastream_operation
     with_options if: :operation_requires_name? do |obj|
       obj.validates :name, presence: true
     end
     validate :valid_datastream_and_attribute_name, if: [ 'batch_object.model', 'datastream', 'name' ]
     with_options if: :operation_requires_value? do |obj|
       obj.validates :value, presence: true
       obj.validates :value_type, inclusion: { in: VALUE_TYPES }
+    end
+
+    def valid_datastream_operation
+      if operation == OPERATION_CLEAR_ALL
+        unless datastream == 'descMetadata'
+          errors.add(:operation, "Operation #{operation} is not valid for #{datastream}")
+        end
+      end
     end
 
     def operation_requires_name?
       [ OPERATION_ADD, OPERATION_DELETE, OPERATION_CLEAR ].include? operation
     end