JohnDoe
September 28, 2020, 7:46pm
#1
Hello everyone,

I am trying to calculate the net total for the items in this table.

I am using the Custom Script in ERPNext. Here is what the code that I have tried using so far:

```
let calculate_total_amount = function (frm, dt, dn){
let total_amount = 0.0;
var tbl = cur_frm.doc.items || [];
for(var i = 0; i < tbl.length; i++) {
total_amount+=flt(tbl[i].amount);
}
frm.set_value("Total",total_amount);
refresh_field("Total");
};
frappe.ui.form.on('Sales Order Product', {
amount: function(frm, dt, dn){
calculate_total_amount(frm, dt, dn);
},
});
frappe.ui.form.on('Sales Order 1', {
onload_post_render: function(frm, dt, dn){
if(frm.doc.docstatus==0 || frm.doc.docstatus==2)
{
calculate_total_amount(frm, dt, dn);
}
},
});
```

Any help would be appreciated.

Hey @JohnDoe try the below-given code please change the variable according to your requirement

```
frappe.ui.form.on('Sales Order Product', {
amount: function(frm, dt, dn){
calculateTotalAmountOfChild();
},
});
function calculateTotalAmountOfChild(){
var totalAmount = 0;
for(var i = 0; i < cur_frm.doc['items'].length; i++)
{
totalAmount += cur_frm.doc['items'][i].amount;
}
return parseFloat(totalAmount)
}
function setReceiptPaymentAmount(totalAmount){
if(cur_frm.doc.entry_type == 'Receipt'){
cur_frm.set_value("receipt_amount",parseFloat(totalAmount))
cur_frm.refresh_field("receipt_amount")
}
else {
cur_frm.set_value("grand_total",parseFloat(totalAmount))
cur_frm.refresh_field("gran_total")
}
}
```

JohnDoe
September 29, 2020, 7:19pm
#3
Hey @ROHAN_JAIN1 , thanks for your reply.

So, does something like this look right to you?

I tried this, but it doesn’t seem to work even if I submit the form.

```
frappe.ui.form.on('Sales Order Product', {
amount: function(frm, dt, dn){
calculateTotalAmountOfChild();
},
});
function calculateTotalAmountOfChild(){
var grand_total = 0;
for(var i = 0; i < cur_frm.doc['items'].length; i++)
{
grand_total += cur_frm.doc['items'][i].amount;
}
return parseFloat(grand_total);
}
```

emre
September 30, 2020, 7:12am
#4
Dear JohnDoe,

we have 2 extra cloumn in our prices one is item rate other is installation rate we are showing total at bottom fields one is total_item_rate other is total_installation_rate . my calculate script at below you can modify and call in your function as you need.

```
cur_frm.cscript.calculate = function(frm, cdt, cdn){
var row = locals[cdt][cdn];
var total_item = 0;
var total_installation = 0;
cur_frm.doc.items.forEach(function(row) {
total_item += (row.item_rate * row.qty);
total_installation += (row.installation_rate * row.qty);
});
cur_frm.set_value('total_item_rate', total_item);
cur_frm.set_value('total_installation_rate', total_installation);
cur_frm.refresh_field('total_item_rate');
cur_frm.refresh_field('total_installation_rate');
};
```

JohnDoe
September 30, 2020, 4:00pm
#5
I don’t think you understand what I need. I have a table of products which you can put multiple rows of the products each with their own rates and quantity. I want to calculate all the totals of the rate * quantity and I want it to calculate it even though you don’t know the number of products in the table.

I already have a code that calculates quantity * rate for each row. The outcome for each row is the Amount column.

So like I want amount1 + amount2 +… Maybe this photo will help.

emre
September 30, 2020, 4:42pm
#6
`cur_frm.doc.items.forEach(function(row)`

already do calculation for unknown number of row and my script can easy tweaked in your use like below…

```
cur_frm.cscript.calculate = function(frm, cdt, cdn){
var row = locals[cdt][cdn];
var total_amount = 0;
cur_frm.doc.items.forEach(function(row) {
total_amount += row.amount;
});
cur_frm.set_value('your_total_amount_field_in_main_doctype', total_amount);
cur_frm.refresh_field('your_total_amount_field_in_main_doctype');
};
```