
Learn how to override the write method in Odoo to add custom logic, validation, and actions when updating records. Step-by-step guide with examples.
The write method in Odoo is used to update existing records in the database. Overriding this method allows developers to implement custom logic and validation when modifying records. In this blog post, we will explore how to override the write method in Odoo with practical examples to enhance functionality and maintain data integrity.
The write method is part of Odoo's ORM (Object-Relational Mapping) framework, allowing users to modify existing records in a model. It takes a dictionary of field names and their corresponding values as input, updating the specified fields for the record(s). By overriding this method, you can add custom behavior before or after the record is updated.
Overriding the write method can be useful for various reasons, such as:
To override the write method in Odoo, follow these steps:
To start, you need to inherit the model you want to modify. For example, let’s say we want to override the write method for the res.partner model, which manages contacts in Odoo.
from odoo import models, api
class CustomPartner(models.Model):
_inherit = 'res.partner'
Next, you can override the write
method. Here’s an example of how to do this:
@api.multi
def write(self, vals):
# Custom logic: Log changes to the 'name' field
if 'name' in vals:
# Log the change or perform some validation
old_name = self.name
new_name = vals['name']
_logger.info(f'Changing name from {old_name} to {new_name}')
# Call the original write method to ensure standard behavior
result = super(CustomPartner, self).write(vals)
return result
In this example:
vals
dictionary.write
method using super()
to ensure that the record is updated correctly.Overriding the write method is also a great opportunity to implement custom validation logic. For example, let’s ensure that the email address of a partner is in the correct format:
import re
from odoo.exceptions import ValidationError
class CustomPartner(models.Model):
_inherit = 'res.partner'
@api.multi
def write(self, vals):
if 'email' in vals:
email = vals['email']
if not re.match(r'^[^@]+@[^@]+\.[^@]+$', email):
raise ValidationError("Invalid email address format.")
# Call the original write method
return super(CustomPartner, self).write(vals)
In this example:
ValidationError
.write
method to apply any valid changes.You can also trigger actions based on the fields being updated. For instance, if a partner's status is updated, you might want to send a notification:
class CustomPartner(models.Model):
_inherit = 'res.partner'
@api.multi
def write(self, vals):
# Check if the status field is updated
if 'status' in vals:
# Trigger a notification or action
self.env.user.notify_success('Partner status updated.')
# Call the original write method
return super(CustomPartner, self).write(vals)
In this case, if the status field is updated, a notification is sent to the user after the record is written.
When overriding the write method, consider the following best practices:
super()
: Ensure that the base method is called to maintain the original functionality.write
method to enhance maintainability.Overriding the write method in Odoo allows you to implement custom logic, validate data, and trigger additional actions whenever records are updated. By following the steps outlined in this blog, you can easily enhance your Odoo applications to meet specific business requirements. Whether you need to log changes, validate input, or automate actions, the write method provides a flexible way to customize record updates in Odoo.
For more Odoo development tips and tricks, be sure to check our website Free web snippets.
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