How to Make a Field Readonly Based on Condition in Odoo

Abid Patel
18-Oct-2024 Updated : 18-Oct-2024

Learn how to make fields readonly based on conditions in Odoo using attrs in XML and Python code. Discover best practices for field management.

How to Make a Field Readonly Based on Condition in Odoo

In Odoo, there are scenarios where you might want to make a field readonly based on specific conditions. This functionality is particularly useful when you want to restrict user input based on the status of the record or the values of other fields. In this blog, we will explore how to achieve this using the attrs attribute in XML and Python code in Odoo.

Using the attrs Attribute to Set Readonly

The attrs attribute is a powerful tool in Odoo that allows you to set dynamic properties for fields directly in your views. You can use this attribute to make a field readonly based on conditions, enhancing user experience and data integrity.

Example of Setting a Field as Readonly Using attrs

Here’s an example of how to make a field readonly based on the value of another field using the attrs attribute:

xml

<field name="status" widget="statusbar" statusbar_visible="draft,confirm,done"/>
<field name="discount" attrs="{'readonly': [('status', '=', 'done')]}"/>

In this example, the discount field will be set as readonly if the status field is equal to 'done'. This prevents users from modifying the discount value after the order has been confirmed and finalized.

Making a Field Readonly with Python Code

In addition to using the attrs attribute in XML, you can also control field properties using Python code in the model definition. This is particularly useful for more complex conditions that may involve multiple fields or require additional logic.

Example of Using Python to Control Readonly Behavior

Here’s an example of how to make a field readonly based on conditions defined in Python:

python

from odoo import models, fields, api

class SaleOrder(models.Model):
    _inherit = 'sale.order'

    discount = fields.Float(string='Discount')

    @api.onchange('state')
    def _onchange_state(self):
        if self.state == 'done':
            return {'readonly': True}
        return {'readonly': False}

In this code snippet, the discount field will be set to readonly if the state of the sale order is 'done'. The @api.onchange decorator is used to trigger the method whenever the state changes, allowing for real-time updates to the field’s readonly status.

Combining XML and Python Approaches

Often, you may find that a combination of XML and Python approaches is the best solution. You can use the attrs attribute for simple conditions in the view and leverage Python for more complex logic. This flexibility allows you to create a user-friendly interface while maintaining the integrity of your data.

Conclusion

Making fields readonly based on conditions in Odoo is a straightforward process that can significantly enhance user experience and data management. By using the attrs attribute in XML and Python code, you can implement dynamic readonly behavior that meets your business needs.

For more advanced customizations and best practices, refer to the official Odoo documentation or consult with experienced developers to ensure optimal implementation in your Odoo instance.

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