
Discover how to use Transient Models in Odoo for temporary data storage in wizards and enhance your Odoo customization skills.
In Odoo, models play a vital role in how data is managed and processed. Among the various model types, the Transient Model stands out due to its temporary nature. A Transient Model is used to store data for a short period, usually during a session or a wizard process. Unlike standard Odoo models, data in a Transient Model is not meant to be stored permanently in the database. This blog will walk you through the concept of the Transient Model in Odoo, its usage, and how to create one.
A Transient Model in Odoo is a special kind of model that holds temporary data. It is typically used for wizard interfaces, where data only needs to be stored until the operation is completed. Odoo automatically clears data from transient models after a certain period, making them ideal for use cases where persistent storage is unnecessary.
In Odoo, transient models inherit from the models.TransientModel class. This ensures that the model operates as a temporary data store and is cleared from the database after a certain time.
Some common use cases for using Transient Models in Odoo include:
Creating a Transient Model in Odoo is simple. Here’s a step-by-step guide to defining a transient model using Python:
To create a transient model, you need to define it in your custom module by inheriting from the models.TransientModel class. Below is an example:
from odoo import models, fields, api
class MyTransientModel(models.TransientModel):
_name = 'my.transient.model'
_description = 'Temporary Data Storage Model'
name = fields.Char(string='Name')
temporary_data = fields.Text(string='Temporary Data')
In this example, we define a transient model named my.transient.model that contains two fields: name and temporary_data. This model will store data temporarily and will not be persisted long-term in the database.
Transient models are often used in wizards. Here’s an example of how you can use the transient model in a wizard interface:
class MyWizard(models.TransientModel):
_name = 'my.wizard'
input_data = fields.Char(string='Input Data')
def action_confirm(self):
# Code to process the wizard's data
print("Wizard data processed: ", self.input_data)
This example demonstrates how you can collect data in a wizard form using a transient model. The action_confirm method processes the temporary data entered by the user.
After defining the model and wizard, the next step is to create the view for the wizard in XML. Here’s an example:
<record id="view_my_wizard_form" model="ir.ui.view">
<field name="name">my.wizard.form</field>
<field name="model">my.wizard</field>
<field name="arch" type="xml">
<form string="My Wizard">
<group>
<field name="input_data"/>
</group>
<footer>
<button string="Confirm" type="object" name="action_confirm" class="btn-primary"/>
<button string="Cancel" class="btn-secondary" special="cancel"/>
</footer>
</form>
</field>
</record>
This XML defines the form view for the wizard, allowing users to input data that is processed by the transient model.
Here are some important characteristics of Transient Models in Odoo:
The Transient Model in Odoo is a useful feature for scenarios where data only needs to be stored temporarily. It’s perfect for wizard interfaces, temporary forms, and other use cases where data persistence is not required. By using transient models, developers can create efficient and streamlined workflows that don’t clutter the database with unnecessary data.
To explore more about Odoo models and their usage, visit the Odoo blogs or explore more advanced features with Freewebsnippets.
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