How to get today date

@mrmo, define your logic based on customer field change!

You can achive this, because you dont have the customer while onload, so you cant call the server to get the credit_days from the customer.

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@max_morais_dmm I am thankful for your help, maybe I have explained it wrong, let me try again.
I would like to add days based on days that I input in the custom field on the sales invoice document, which I call credit days. I am sorry for the confusion, below is a picture with screenshot for your reference, thank you so much.

frappe.ui.form.on('Sales Invoice', 'credit_days', function(frm){
frm.set_value("due_date", frappe.datetime.add_days(frappe.datetime.nowdate(), frm.doc.credit_days));

@max_morais_dmm I am very thankful for your help, you are awesome!
When I am finished with this customization project, I will share all for the rest to enjoy.
Thank you!



How to get month’s first date for report module ?

Hardik Gadesha

@Hardik_Gadesha try with frappe.datetime.month_start()

Where can I find documentation on frappe.datetime methods?


Hi, @tmatteson! and frappe.datetime have similar methods. You can find the documentation for frappe.utils in:

However, we’re both in the same boat. I haven’t found the documentation for frappe datetime methods. I usually just rely on Pycharm’s autocomplete and code suggestion feature. :slight_smile: Sometimes, I run console on chrome or firefox just to figure out the different frappe methods.

Hope it helps.



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hi all

iv done the above steps while im trying to update item delivery date in sales order

i`v created a custom field in item and sales order item called delivery_days and fetched it successfully by


and tried the followign script

frappe.ui.form.on(‘Sales Order Item’, ‘delivery_days’, function(frm){
frm.set_value(“delivery_date”, frappe.datetime.add_days(frappe.datetime.nowdate(), frm.doc.delivery_days));

it makes the item delivery date today not today + frm.doc.delivery_days

whats wrong with that ??

so sorry about repost

but i really need this script ASAP

Hey @Mahmoud_Ghoneem

The frappe.datetime.nowdate() and frappe.datetime.add_days are python/ server side code, so they won’t work in your javascript. Sorry, and I understand your confusion about it.

Frappe uses the moment library for client side datetime functionality. The documentation you need to do this is there. Moment.js | Docs

Thanks for your reply

but actually its working when i use th following code in custom script for sales order item

frappe.ui.form.on(‘Sales Order Item’, ‘delivery_days’, function(frm){
frm.set_value(“delivery_date”, frappe.datetime.add_days(frappe.datetime.nowdate(), 12);

and it works fine Today+12 Day

but actually what i need is to get custom field (delivery_days) instead of 12

what should i do ??

Expected input: delivery days = 12;
Expected output: delivery date = today + delivery_days;

Break this into two lines of code and console.log the intermediate step.

Look for in the docs, I think that may be where you’re stuck.

They are already on two lines



frappe.ui.form.on(‘Sales Order Item’, ‘delivery_days’, function(frm){
frm.set_value(“delivery_date”, frappe.datetime.add_days(frappe.datetime.nowdate(), frm.doc.delivery_days));

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Yes, you’re trying to do math inside the setter function, which makes it harder to debug. Pull the math out and log it so you can see where you’re going wrong; that’s what I meant by move it into two statements.

hi, i used your code

  1. when i input days like 10 in credit days, due date will automatically add 10 days;
  2. but if i “save” invoice, due date will become the same as posting date.

Please help.

My system:
Installed Apps
ERPNext: v10.0.4 (master)
Frappe Framework: v10.0.5 (master)

any updates yet !!!

HI @rmehta,

This syntax is giving an error in server script, can you suggest me the solution?
Please refer the below code and error.