Calling variables within other variables in Jmeter

Question

I have a set of JSON templates in a CSV file and a DataInsert: {"Data":"${DataInsert}"}, testdatainsert Variables are defined as JSONTemplate,DataInsert

I'm running an HTTP request with the body: ${__V(JSONTemplate${DataInsert})}

And I would like this to send: {"Data":"testdatainsert"}

However, what I end up sending is JSONTemplatetestdatainsert

I dont think I understood this documentation very well: https://jmeter.apache.org/usermanual/functions.html#what_can_do

Any help would be appreciated.

Dmitri T · Accepted Answer · 2022-05-26 11:17:02Z

1

If you have a value from CSV which holds another JMeter Function or Variable - you need to wrap it into __eval() function in order to resolve the underlying variable (or function).

If you have:

DataInsert variable with the value of testdatainsert
JSONTemplate variable with the value of {"Data":"${DataInsert}"}

and you need to get {"Data":"testdatainsert"} - you need to refer the variable as:

${__eval(${JSONTemplate})}

Demo:

More information: Here’s What to Do to Combine Multiple JMeter Variables

answered May 26, 2022 at 11:17

Dmitri T

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