To determine the method to use to render a recport according to its type, the generic method 'render' defined into ir.action.report check if a method name is defined on the model. https://github.com/odoo/odoo/blob/12.0/odoo/addons/base/models/ir_actions_report.py#L734 Therefore, we must provide this method to be compliant with what's expected by Odoo. This change will also allows the usage of py3o template with mail_template once https://github.com/odoo/odoo/pull/30013 will be merged
OCA alternative reporting engines and reporting utilities for Odoo
This repository hosts alternative reporting engines to the ones included on Odoo core (RML, QWeb and Webkit). It is complemented with the ones that host the reports theirself:
https://github.com/OCA/account-financial-reporting https://github.com/OCA/purchase-reporting https://github.com/OCA/sale-reporting ...
The convention is to use a suffix to each module to indicate that it's for using with that report engine (for example, account_invoice_report_birt or sale_order_report_pentaho).
It can contain also another utilities directly involved with reports (like merge/split utils, checkers, signing tools and so on).
OCA, or the Odoo Community Association, is a nonprofit organization whose mission is to support the collaborative development of Odoo features and promote its widespread use.