Customizing ERPNext -- will bench update later override our changes?

[Alaa]

@brian_pond

However, this App code is somewhat standalone. You can create new features. But your App isn’t modifying the core DocTypes like Customer, Supplier, or Sales Order.

Do you mean that Custom Apps cannot override built in features? In WordPress, it is possible for a Plugin to change the behaviors of Core WordPress feature without modifying the core files. This is done through Hooks and Filters.

So, is it possible to modify, say, a Sales Order functionality in ERPNext by hooking with a Custom App so that core files remain untouched? In other words, can a Custom App alter ERPNext Flow?

[brian_pond]

Hi @Alaa,

Yes, the framework does have Hooks that can modify behaviors of built-in document classes.

Otherwise, you can use Monkey/Guerilla Patching to override the core code.

[Alaa]

@brian_pond

Otherwise, you can use Monkey/Guerilla Patching to override the core code.

Hi @brian_pond
Good to know about the idiom Monkey Patching. Thank you!

[moe01325]

is there a good and easy example/how to monkeypatch js and/or python in regard to ERPnext available?
Thanks!

[ABIZEYIMANA_Victor]

@brian_pond

Monkey/Guerilla Patching

You can follow this thread for monkeypatches

How to override method in frappe?

refer to this app GitHub - aakvatech/CSF_TZ for monkey patching any method copy and adapt this file into your own custom app CSF_TZ/__init__.py at master · aakvatech/CSF_TZ · GitHub create python file under monkey_patches folder like this file. CSF_TZ/db_transaction_writes.py at master · aakvatech/CSF_TZ · GitHub