What Is the Use of api.onchange in Odoo15 | @api.onchange Odoo15 | Odoo 15 Development Tutorials

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Odoo api.onchange decorator is used to invoke a method when a field's value changed. It can be used to validate the data or to trigger an action.

Video Contents
00:15 Introduction
00:45 Define an onchange function

The function of this decorator will be called when the field value changes. Moreover, it supports only single field names; on the contrary, dotted names such as parent_id.field_name will not be considered.

Furthermore, onchange methods are invoked on pseudo-records that contain values of the form. In this video, we are invoking a function to set the country automatically when we set a value in the Nationality field.

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