DataWeave - Transformer Mule 错误 "There is no variable named 'message'"

DataWeave - Transformer Mule error "There is no variable named 'message'"

如何通过 DataWeave 转换器在 mule 中显示出站属性

我试过这个:

%dw 1.0
%output application/json skipNullOn="everywhere"
---
{
   test_property: message.outboundProperties.testProperty
}

但我收到此错误:There is no variable named 'message'

谢谢。

不使用'message'直接调用如下图

test_property: outboundProperties.testProperty

或者定义一个流变量并如下使用它

flowvar1: flowVars.flowvar1