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Categories become "detached item" after clicking 'Cancel' button
Closed, ResolvedPublic1 Estimate Story Points


When following the steps - do not click on 'Apply Changes button'!

  1. In VE-> Categories. Add three categories
  2. Click on the drop-down arrow to delete two of them.
  3. Click 'Cancel'
  4. Re-open the box and one of the categories is still there
  5. Try to delete the remaining category - Uncaught TypeError is displayed:

Error: Cannot remove detached item
remove (undefined, line 380)
(anonymous function) ([native code], line 0)
dispatch (load.php, line 65)
handle (load.php, line 60)

Uncaught TypeError: Cannot read property 'metaItem' of undefined ve.ui.MWCategoryWidget.onRemoveCategoryVM636:7 oo.EventEmitter.emit ve.ui.MWCategoryPopupWidget.onRemoveCategoryVM636:7 oo.EventEmitter.emitOO.ui.ButtonElement.onClickVM636:128 OO.ui.ButtonWidget.onClickload.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150218T2…:65 jQuery.event.dispatchload.php?debug=false&lang=en&modules=jquery%2Cmediawiki&only=scripts&skin=vector&version=20150218T2…:60 jQuery.event.add.elemData.handle

After clicking the 'Apply button' at any step(even at the last one when it looks like a category cannot be removed), all come back to normal workflow and all categories get deleted.


Related Gerrit Patches:

Event Timeline

Etonkovidova raised the priority of this task from to Medium.
Etonkovidova updated the task description. (Show Details)
Etonkovidova added a project: VisualEditor.
Etonkovidova added a subscriber: Etonkovidova.
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptFeb 19 2015, 2:03 AM

I can't reproduce step 4 - I reopened the categories dialog, but the categories are still all gone.

Although I can 'Move x category here' on one of the categories which I cancelled addition of, which does error "Uncaught Error: Cannot remove detached item"

Change 193496 had a related patch set uploaded (by Alex Monk):
MWCategoryWidget: Remove entries from this.categories when appropriate

Krenair claimed this task.Feb 27 2015, 10:24 PM
Krenair set Security to None.

Change 193496 merged by jenkins-bot:
MWCategoryWidget: Remove entries from this.categories when appropriate

Verified the fix in beta.

Re-opening: the issue is present in beta, test2, and production - attached the screencast. The issue is not too serious- those 'detached' categories are not saved.

As Alex noticed - re-arranging the categories(dragging them) - and then deleting them causes errors when the Options-Categories dialog is re-opened.

The clarified steps:

  1. Add three categories - AA, BB, CC
  2. Move CC category - insert it in front of BB, then in front of AA (the sequence seems to be important)
  3. Delete AA and BB - click 'Cancel'
  4. Re-open Categories - CC category remains displayed.
  5. Click CC to delete -

Error: Cannot remove detached item
and sometime

TypeError: this.categories[name] is undefined

Etonkovidova reopened this task as Open.Mar 11 2015, 10:59 PM
Etonkovidova removed a project: Verified-in-Phase0.

Marking this issues as 'Closed' again.

The bug about re-arranging categories(drag-and-drop) is opened as "Re-arranged(drag-drop) Categories become "detached item" after clicking 'Cancel' button".

Etonkovidova closed this task as Resolved.Mar 16 2015, 5:48 PM

The bug about re-arranging categories(drag-and-drop) is opened as "Re-arranged(drag-drop) Categories become "detached item" after clicking 'Cancel' button".

Fixed link: T92861