Automatically fill Child Table rows

Frappe Framework
1

Hi,
Can someone help me… I have to automatically populate list of child companies in a child table row by row when a parent company is selected in the same child table. I have done halfway but the all the company is getting selected in the same row itself. I want it row after row
Below is my script

frappe.ui.form.on("Item Default","company",function(frm,cdt,cdn){
    var d=locals[cdt][cdn];
    var c=[];
    if(d.company=="Company-01"){                   //Check if it is the parent company
        console.log(d.company);
        var comp=frappe.db.get_list('Company',{
        fields:['company_name'],   
        filters:{
            parent_company:'Company-01'           // Get all the child company
        }
        }).then(records=>{
            console.log(records);
            var d=records.length>0?records:[]
            for(var i=0;i<d.length;i++){
                var ff=d[i].company_name;
                c.push(ff)
        }
    frappe.model.set_value(cdt,cdn,"company",c)
    })
    }
});

Thanks…In advance

2

Check this out: Child Table Link Field Population - #76 by Vesper_Solutions

At the very end of the feed, you’ll see a general template I’ve cited to populate child tables on every criteria possible

3

Thank you for the response…
I tried…still it isnt working
can you tell me how to do it?

4

Cite your form structure and all related fields

5

Thank you for your time…let me explain my requirement ,In the Item Doctype, there is a child table “Item Default”, when i select my parent company “Company-01” in the first row…i need my rest of the child companies “company-02,company-03” automatically fetch in each of the rows

6

Thank you for your support…I have solved it