Argument in Custom Script for method with input "self"

Frappe Framework Customization
1

Im trying to run a custom script to call a custom method with the following code:

frappe.ui.form.on(‘Sales Order’, ‘other_charges’, function(from){

frappe.call({
				"method": "erpnext.controllers.taxes_and_totals.calc_tot_cont",

				args: { },
				
				callback:function(r){ cur_frm.set_value("total_contribution",total_contribution);}
			});
})

My python code is as follows:

@frappe.whitelist()
def calc_tot_cont(self):
	total_contribution = 0.0
	for item in self.doc.get("items"):
		total_contribution += ((item.base_rate - item.incoming_price) * item.qty)
	total_contribution -= self.doc.other_charges
	
	return total_contribution

While the script runs, I get an error saying the the method requires 1 argument , but 0 are given. Could somebody help me out with this?
What argument should be given for a method running self?

Thanks a lot!

2

@Tanuj
As you not passing any argument in frappe.call .
why you write in script, remove - args: { } and try again.

3

Hi @Sangram,

Thats exactly what i had input. Still got the error.
I found a separate solution to my problem with another script, but would still like to know how to pass the arguments for future reference.

Thanks!

4

@Tanuj
check frappe.call syntax
e.g. if you have pass customer and name of sales order as argument .

frappe.ui.form.on('Sales Order', 'other_charges', 
	function(frm){
		frappe.call({
			"method": "your_method_path",
			args: { 
				"docname": frm.doc.name,
				"customer": frm.doc.customer
			},
			callback:function(r){ 
				//your script
			}
		})
	})