script to check if a variable exists

[Aka Guglielmo]

Do you have any idea on how to check, inside a workflow, if a variable exists?

Let me say, something like: if (current.variables.variableName.exists).

Because if (current.variables.variableName != '') returns an error.

Thanks

[Ankur Bawiskar]

Hi William,

Just check using JSUtil nil() method.

Mark Correct if this solves your issue and also hit Like and Helpful if you find my response worthy based on the impact.

Thanks

Ankur

[Chuck Tomasi · Accepted solution]

I suppose an even easier way is just to test it.

if (current.variables.var_name) {

        // The variable exists and is not null

} else {

        // The variable does not exist

}

The same can be done with fields as well to avoid null pointer exceptions. See the best practices.

Reference:

ServiceNow Wiki: Technical Best Practices

[Aka Guglielmo]

thanks chuck!

[Chuck Tomasi]

You are welcome. Thanks for using the community!