You can't. The component looks for the helper like so: $helperFile = JPATH_BASE . '/modules/mod_' . $module . '/helper.php'; where $module is the name of your module. You will have to move the helper.php to modules/mod_modname


The JModelAdmin save() method handles both inserting a single record into a table and updating a single record, and it calls the following Table-related functions: $table = $this->getTable(); This enables it to get an instance of the Table class - eg for com_content it will be the Content class in libraries/src/Content/Table.php. I'm assuming that you ...

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