populate defaul property via javeascript

Without image the question is a little bit hard to understand

But maybe you could use a "onAfterNew" Client Event in your ItemType. E.g. check out Method 'PE_SetOriginator". This one is used very often to set the owner property automatically.

So im trying the following added code on the property itself, oneditfinish event and i will get the following error

 var SDRLMDID = document.thisItem.getProperty("vsy_did_master",""); 
 var SDID = this.getInnovator().getItemById("Supplier DID", SDRLMDID);
 if (SDID.getItemCount()==1)
    {
        this.setProperty("vsy_first_delivery", SDID.getAttribute("id"));
      this.setPropertyAttribute("vsy_first_delivery", "keyed_name", SDID.getProperty("keyed_name", ""));
    }

You cannot use document.thisItem outside the context of a Form. Better try "this". Or take a look at "PE_SetTeam" which is maybe the better sample in your case.

Otherwise show screenshots of the situation cause I really don´t know what you try to do ;-)

Edit: My sample Methods where intended as onAfterNew "Client Events" not as property events. So beware!

okay so ill rephrase the issue again:

There are two items Master DID and SDRL

Both these item contains a property called first_delivery which is a string data type.

Supplier DID has a property called master_did which is an item property links to Master DID item.

There is a third item called subcontract, when the user creates a new SDRL from the relationship in subcontract item and select master_did I want first_delivery to be populated instantly from Master DID before saving.

Please not: it cannot be foreign property as it should be editable

Following are the screen shots.

Hi HKhan

Attach this method to DID Master Property - OnEditFinsh

let selectedMasterDID = gridApplet.cells(relationshipID, colNumber).getValue();
if(selectedMasterDID)
{
var getMasterDID = aras.getItemById("Master DID", selectedMasterDID);
setRelationshipProperty(relationshipID, 'first_delivery', aras.getItemProperty(getMasterDID, "first_delivery","")); //If first_delivery property is in relationship then use this line
setRelatedItemProperty(relationshipID, 'first_delivery', aras.getItemProperty(getMasterDID, "first_delivery","")); // If first_delivery property is in Related Item then use this line
}

hello 

I am getting the following error when i apply this, any idea why? relateditem seems to be defined already

My bad. Updated the code

My bad. Updated the code

Hello Thank you that worked!, also If this relationship is on the DID Master Item itself, how can i inherit master DID value, when sdrl DID is created from the relationship?