Dynamic User Group Assignment in Craft CMS

In this video, Ryan demon­strates imple­ment­ing dynam­ic user group man­age­ment in Craft CMS 5 using event lis­ten­ers with­in a site mod­ule. The core imple­men­ta­tion uses EVENT_AFTER_SAVE on Entry ele­ments to detect when authors reach pub­lish­ing thresh­olds, then mod­i­fies their group assign­ments using Craft’s Users ser­vice. The code shows prop­er event han­dling pat­terns includ­ing check­ing for draft sta­tus, ver­i­fy­ing author exis­tence, and using the assignUserToGroups() method which accepts an array of group IDs.

Ryan explores two dis­tinct approach­es for group assign­ment: addi­tive (pre­serv­ing exist­ing groups while adding new ones using array merg­ing) and replace­ment (com­plete­ly replac­ing all group assign­ments with a new set).