Add Rule on Lookup field

[Rabih Naouss]

Hello

I have a lookup field (within the same site) with multiple selection.
How can I set a rule on this field ?
For example: the field is residence country, if the user select a specific country we need to set list of fields as mandatory.
Please advise

Thanks
Regards

[Alexander Bautz]

Hi,
I assume that this is the classic DFFS.

You must create a rule that has the trigger “No trigger (must be triggered manually)” and then use Custom JS like this:

// No changes to this function
function detectChangesOnMultiLookup(arg){
    let currSelection = getFieldValue(arg.fin);
    setInterval(function(){
        let newVal = getFieldValue(arg.fin);
        if(newVal.toString() !== currSelection.toString()){
            currSelection = newVal;
            currSelection.forEach(function(v){
                if(v === arg.targetValue){
                    arg.callback();
                }
            });
        }
    },1000);
}

// Change fin, targetValue and TriggerMeOnLookupColumnChange
detectChangesOnMultiLookup({fin: "MultiLookup", targetValue: "Test item #3", callback: function(){
     spjs.dffs.triggerRule("TriggerMeOnLookupColumnChange")
}});

Change the fin (MultiLookup) with the internal name of your lookup field and the targetValue (Test item #3) with the target value. Change TriggerMeOnLookupColumnChange to match the rule friendly name of the rule you want to trigger.

Alexander

[Author]

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