What is the Post load hook in Odoo 18

What is the Post load hook in Odoo 18

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  Post load hookin Odoo 18 Enterprise
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  Enterprise Introduction In this slide,we’ll discuss on the post load hook in Odoo 18. post_load is a hook in Odoo executed after modules are loaded but before the application fully starts. It is ideal for server-wide changes and runtime behavior customization. This is often used for monkey patching and initializing configurations. Key benefit of this is that it enables global changes without affecting individual module registries.
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  Enterprise The post_load hookis commonly used for monkey patching, a programming technique where you dynamically modify or extend existing functionality at runtime. In Odoo, this is particularly useful for overriding or enhancing core functionalities globally without directly modifying the source code. Let us consider the example of overriding the email sending behavior in Odoo. We can log all outgoing email messages in a custom format before they are sent, without altering Odoo’s source code.
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  Enterprise In the __init__.pyfile of custom module, we can add the following custom code. from odoo.addons.mail.models.mail_mail import Mail def custom_email_send(): original_send = Mail.send # Save the reference to the original method def new_send(self, auto_commit=False, raise_exception=False): # Log the email details for mail in self: _logger.info(f"Sending email with subject: {mail.subject} and recipients: {mail.email_to}") # Call the original send method to maintain functionality return original_send(self, auto_commit=auto_commit, raise_exception=raise_exception) Mail.send = new_send
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  Enterprise After that wecan add this in the __manifest__.py file. In { 'name': 'Custom Email Logger', 'version': '1.0', 'summary': 'Log email details before sending', 'post_load': 'custom_email_send', 'installable': True, 'application': False, }
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  Enterprise In this example,the Mail.send method from Odoo’s mail.mail model is monkey patched. Before sending an email, details like the subject and recipients are logged using _logger. The original send method is invoked after logging, ensuring the normal email functionality remains intact. Using post_load ensures that the monkey patch is applied only once, during the module’s initialization. This avoids issues where the method might be redefined multiple times, especially in cases where the module might exist in multiple locations in the addons path.
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  For More Info. Checkour company website for related blogs and Odoo book. Check our YouTube channel for functional and technical videos in Odoo. Enterprise www.cybrosys.com