[Mary-Clb]

• I have performed a self-review of my code.
• I have added tests (when available) that prove my fix is effective or that my feature works.
• [xupdate ] I have updated the CHANGELOG with a short functional description of the fix or new feature.
• This change requires a documentation update.

Description

• It fixes !46413
• Follow-up of FIX / Mandatory field validation not enforced on update #1269.

When a ticket is created with a filled mandatory field from a "dom" container and an assignee, an error "Some mandatory fields are empty" is displayed and the ticket stays in the "New" status instead of "Processing (assigned)". This happens with the standard ticket form and with GLPI forms. During Ticket::add(), GLPI runs an internal update() on a new instance to set the assigned status, before the "item_add" hook stores the plugin values. Since #1269, mandatory fields are checked on updates against the persisted values, which do not exist yet at that point, so the check fails and the internal update is cancelled. The issue was reported after #1294, but it is not related to it.

Items being added are now tracked in a WeakMap from "pre_item_add" until "item_add". For an update made in this window, tab containers are skipped as they are on creation, and "dom" containers are checked against the values submitted on the add instead of the database, so status overrides still apply. Tests covering a filled mandatory field, a mandatory field set by a status override, and a mandatory tab container on a ticket created with an assignee are added.

Screenshots :

Before :

After :