How To Override a Method in Frappe or ERPNext

If you need to alter methods written by ERPNext and/or Frappe teams, you will need to override the method with your own custom method. This is done by introducing the override to the hooks file inside your custom application, and then pointing the hook to the place where the class containing your custom method is.

[SanjayKumar]

Good one. Just to connect, instead of extending Document class, you should extend Student class in your overridden class. In this way you can have all the functionality of main Student class and you can override method you want. Also you can call super to first call main class method and thereafter you can write other logic.
This is the concept of OOP (Object Oriented Programming).

[MuhammadSajid-zvyj]

Brilliant!! this is what I was looking for since long.

[CABhagChandChechani]

Thanks, we referred it today to achieve it and got success

[abrhamb]

Thanks, can we override JavaScript method.

[YasserElbana]

Thank you very much . this tutorial was very useful

[nirajregmi]

How to apply filter permanently. For example we want to give access to those documents that are pending approval from manager to manager. If we just use filter option it can be removed by clearing filter. How to make the list of manager's list view that only shows pending approval status documents only

[abdulghaniahmedal-ameri]

Hey Mr.karani I have created new module inside frappe app and I want to commit it on my site, can you tell me how can I do that please

[KERRY]

How to make student appear in customer lists for invoices erpnext 14

[parthvashista]

I want to override the core file class in frappe for a single doctype in my custom app. how can I do that

[mariamali-kogb]

How to override the python method which isn’t inside a class?

[mohamedmohideen]

How to disable mandatory field in erp next, because i cant able to hide that. can you have any solution for this.

[YasserElbana]

please Override the whitelisted method?

[mohamedabdelmoneim]

❌THIS IS WRONG!❌
you should inherit from `Student` not `Document`
also you shouldn't override all logic in `validate()`, instead:

class ERPNextAddress(Address): // inherit from the doctype you need to override
def validate(self): // method you need to override
// your new logic
super(ERPNextAddress, self).validate() // still calling the code of validate() of the parent