Layer7 API Management

Hi There,

I have below json data,if the data is null i want to send some notification to user through return template response.How can i check null data condition in API gateway in the json express i,e curly braces.pls advice.

{

"GUID" : "323"

}

specifically I want to check null ,for instance ,if the data is null or empty in the curry braces {   } do this,how can i do this in the CA API gateway.

the json path assertion can get the value of a json node, then you can use compare assertion to check if it's empty.