IRRE / inline

Inline-Relational-Record-Editing (IRRE) offers a way of directly editing parent-child-relations in one backend view. New child records are created using AJAX calls to prevent a reload of the complete backend view.

type=’inline’ is a powerful element that allows handling a huge list of relations. This includes simple 1:n and nested 1:n-1:n relations, as well as various m:n relation scenarios with different view aspects and localization setups. Combined with other TCA properties in ‘ctrl’ and ‘types’, the sheer amount of different display variants is amazing.

Be aware that inline has been mostly designed to manage 1:n relations. In those relations one parent record can have multiple children, but one child is connected to only one parent. Children can not be moved from one parent to another.

The exception are m:n relations where a child can be connected via an intermediate table to multiple parents, and the intermediate table can have editable fields on its own, thus attaching additional information to one specific parent-child relation. In the core, the “FAL” / resource handling is an example of that. A parent record (for instance of table “tt_content”) is connected via table “sys_file_reference” to one media resource in “sys_file”. A sys_file record has table “sys_file_metadata” as child record which holds meta information details of the file in question (for instance a description). This information can be overwritten for the specific file resource used in “tt_content” by adding a new description in table “sys_file_reference”. The various inline and field properties like “placeholder” help managing this complex setup in TCA.