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The main method provided by this module is upgrade_changed_checksum on
ir.module.module. It runs a database upgrade for all installed modules
for which the hash has changed since the last successful run of this
method. On success it saves the hashes in the database.
The first time this method is invoked after installing the module, it
runs an upgrade of all modules, because it has not saved the hashes yet.
This is by design, priviledging safety. Should this be an issue, the
method _save_installed_checksums can be invoked in a situation where
one is sure all modules on disk are installed and up-to-date in the
database.
To invoke the upgrade mechanism, navigate to Apps menu and use the Auto-Upgrade Modules button, available only in developer mode. Restarting the Odoo instance is highly recommended to minify risk of any possible issues.
Another easy way to invoke this upgrade mechanism is by issuing the following in an Odoo shell session:
env['ir.module.module'].upgrade_changed_checksum()