nested if statements in functions

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Posted on by dbgghost

I am trying to set a variable with different message values based on the outcomes of actions in a flow. I am using this if statement in a compose action to do so:

if(equals(body('Run_HQ-0001-DHR_Execute_JAron_python_script_PAD_flow')?['Message'], null),
outputs('Capture_Error_Message'),

if(greater(length(body('Run_HQ-0001-DHR_Execute_JAron_python_script_PAD_flow')?['Message']), 0),
body('Run_HQ-0001-DHR_Execute_JAron_python_script_PAD_flow')?['Message'],
outputs('JAron_Flow_Failed_Message')))

The flow runs successfully and does not give me an issue with this syntax, however the output is always empty. Assuming each output has a value (which they do in the flow), why would the output still be blank? Is something wrong with the syntax, or would you suggest it involves one of the outputs?

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Verified answer

ManishSolanki 15,089 Super User 2025 Season 2 on at

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Re: nested if statements in functions

Hi @dbgghost

My guess is the body object does not contain message property. Please try removing all ? from the expression to get the error message:

if(equals(body('Run_HQ-0001-DHR_Execute_JAron_python_script_PAD_flow')['Message'], null),outputs('Capture_Error_Message'),if(greater(length(body('Run_HQ-0001-DHR_Execute_JAron_python_script_PAD_flow')['Message']), 0),
body('Run_HQ-0001-DHR_Execute_JAron_python_script_PAD_flow')['Message'],outputs('JAron_Flow_Failed_Message')))

Another way is to use compose actions for each piece of expressions used in the condition to find the exact error.

If this helps & solves your problem, please remember to give a 👍 and accept my solution as it will help others in the future.

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