How to Create default_get() method odoo

Hello odooers  & developers, 

Its odoo tips and tricks article, where I would like to share more knowledge about the default_get() method in Odoo 17

as an odoo developer, knowing the fundamentals of default_get() method odoo behaviour, its Syntax, and how we can use the  default_get() method in Odoo is essential.  

Explore default_get method odoo:-

The default_get method is a crucial function in Odoo's ORM that's used to define default values for fields when creating new records. It's automatically called by Odoo whenever a user opens a form to create a new record.

Use of default_get method odoo :-

The default_get method offers a powerful way to populate forms with relevant default values that depend on the context or related records.

Contextual Defaults: Utilize the Odoo context to tailor default values based on user actions, selections, or other contextual information.

Wizard-Specific Defaults: When creating wizards, use default_get to set specific defaults relevant to the wizard's purpose.

Calculated Defaults: If a default value requires calculations based on other fields, you can define a method to compute the value within default_get.

Default_get method usage and Syntax:

        defaults = super(CreateStudent, self).default_get(fields)

        active_ids = self._context.get('active_ids')

        admission = self.env['dev.student.admission'].browse(active_ids)

        if admission and admission.student_id and self.student_action != 'create':

            defaults['student_id'] = admission.student_id.id

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