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

[zabeeulla2]

Hi Chuck,

I tried to implement but i am half way through.

Steps followed:

Cloned the widget "sp-variable-editor" and created a copy in global scope.

Created a record in "sp_ui_formatter" table and pointed the cloned widget with the macro of SM variable editor.

I am able to get varibles on the Service portal form but they are empty.

Could you please suggest me something that would help me fix this issue.

Regards,

Zabeeulla.

[tkaneko]

Another alternative if you have a situation where you need to see if the variable exists but the value may be empty or null is to use the following:

if (typeof(current.variables.var_name) !== 'undefined') {

                    //See if the variable exists regardless if there is a value present

                  if(JSUtil.notNil(current.variables.var_name)){

                            //If necessary check if there is a value (otherwise omit this if statement)

                  }

} else {

        //The variable does not exist

}

[Catalin2]

The safe way is to use native Javascript function - you can use for existence of any property of an Object.

You can check for if a variable exist with current.variables.hasOwnProperty(variablename). If is false, means that you don't have that variable.

[LA_]

How can I incorporate this in Flow Designer whether via Flow Logic or Custom Action? I have a flow that should check if the "approver" catalog variable exists first, before triggering the "Ask For Approval" step.

thanks in advance.