
Learn how to inherit and override functions in Odoo. Customize existing methods like action_confirm, create, and write to enhance your Odoo modules.
Odoo’s modular architecture makes it easy to customize and extend existing functionality. One of the most common techniques for customization is inheriting functions in Odoo. By inheriting and overriding existing methods (functions), developers can add new functionality or modify the behavior of existing features without altering the core codebase. In this blog, we’ll guide you through the process of inheriting a function in Odoo using examples.
In Odoo, every model has methods (or functions) that define how the model behaves. By using the _inherit attribute, you can extend an existing model and override its methods to modify the behavior. When inheriting a method, it’s often important to call the parent method using super()
to maintain the original functionality while adding custom logic.
Let’s say we want to add custom behavior to the sale.order model’s action_confirm method, which is called when a sale order is confirmed. Here's how we can inherit and extend the action_confirm function in Odoo:
from odoo import models
class CustomSaleOrder(models.Model):
_inherit = 'sale.order'
def action_confirm(self):
# Calling the original action_confirm function using super()
res = super(CustomSaleOrder, self).action_confirm()
# Custom logic after confirming the sale order
print("Sale Order Confirmed! Custom logic executed.")
return res
In this example, we inherit the sale.order model by using the _inherit
attribute. The action_confirm
method is overridden to add custom logic. We first call the original method using super()
to ensure the default behavior is retained, and then we add our custom functionality (in this case, printing a message).
super()
in Function Inheritance?When inheriting a function in Odoo, it’s often important to call the parent function using super()
to preserve the existing behavior. Failing to do so will override the method entirely, which could result in a loss of critical functionality. For example, in the case of the action_confirm method, Odoo performs several actions when confirming a sale order, such as updating inventory and generating invoices. By using super()
, we ensure these actions still occur while executing our custom logic.
Just like the action_confirm method, you can inherit and modify any other method in Odoo models. For example, if you want to modify the create or write methods to add custom validation or behavior, you can use a similar approach:
create
Method
from odoo import models, fields
class CustomPartner(models.Model):
_inherit = 'res.partner'
def create(self, vals):
# Custom logic before creating a new record
if 'email' not in vals:
raise ValueError("Email is required.")
# Calling the original create method
return super(CustomPartner, self).create(vals)
In this example, we inherit the res.partner model and modify the create
method to add a custom validation (requiring an email field). After performing our custom logic, we call the original create
method using super()
to complete the record creation process.
write
Method
from odoo import models
class CustomSaleOrder(models.Model):
_inherit = 'sale.order'
def write(self, vals):
# Custom logic before updating a sale order
print("Updating sale order with custom logic")
# Calling the original write method
return super(CustomSaleOrder, self).write(vals)
In this case, we inherit the write method of the sale.order model to add custom behavior when updating a sale order. As usual, the original method is called after executing the custom logic to ensure that the default behavior is preserved.
There are several benefits to inheriting functions in Odoo:
super()
allows you to maintain the core functionality of Odoo while extending it, which ensures stability during upgrades and updates.Inheriting functions in Odoo is a key technique for developers to customize existing functionality while maintaining system stability. By using the _inherit attribute and super()
, you can easily add custom behavior to models without disrupting the core processes. Whether you’re overriding a method like action_confirm, create, or write, Odoo’s framework provides the flexibility to extend and enhance your business processes efficiently.
For more Odoo development tips and tricks, be sure to check our website Free web snippets.
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