Apply Multiple Mode in Promotional Scheme

I’m trying to create Buy 1 Get 1 Promo in promotional Scheme and it works well in Point of Sales.
But, how to make my scheme to be multiple effect?
Meaning to say:

• buy 1 chicken get 1 chicken
• buy 2 chicken get 2 chicken
• buy 3 chicken get 3 chicken

Right now, my scheme stuck in 1 chicken:

• buy 1 = free 1 chicken
• buy 2 = free 1 chicken (should be 2 chicken)
• buy 3 = free 1 chicken (should be 3 chicken)

I found my solution now.

I can use “is Recursive” for this
But the thing is when I add a new promotional scheme, there is no further configuration when i tick “is Recursive” option to define my recursive range. I need to change it manually from “Price Rule” document.

This is how my Promotional Scheme document looks like:

And this is how the price rule looks like once it is created:

The other issue is if I want to make Buy 2 get 1 free promo and “round free”, this “recursive Every” field is rounded up so the behaviour is wrong.

Here how it behave:
Promo:

Transaction:
2 Coffee = Free 1 Tea → ( 2 /2 = 1)
3 Coffee = Free 2 Tea → (3 /2 = 1.5 → round free = 2)
4 Coffee = Free 2 Tea → (4 /2 = 2)
5 Coffee = Free 3 Tea → (5 /2 = 2.5 → round free = 3)
6 Coffee = Free 3 Tea → (6 /2 = 3)

SO… I make some modification on my /erpnext/accounts/doctype/pricing_rule/utils.py line 652

from:

``````qty = round(qty)
``````

to:

``````qty = math.trunc(qty)
``````

and don’t forget to:

``````import math
``````