The per-library Collections view: a Jellyfin 12.0 server capability.
GET /Items?parentId=<library>&IncludeItemTypes=BoxSet is a request every supported server answers with HTTP 200, and that is exactly the problem: what changed in 12.0 is whether the server HONOURS the scope. Measured on the local 10.11.11 / 12.0.0 / 12.1.0 servers, 2026-09-23, against a fixture holding one collection of films from HDR Movies and one from Movies:
On 12.x the scope is correct. HDR Movies returns its own collection, Movies returns its own, and the Shows TV library returns 0. On 10.11 with Recursive=true the scope is IGNORED: every one of those three libraries returns BOTH collections, the TV library included. On 10.11 with Recursive=false it is worse still: IncludeItemTypes is ignored too, and the response is the user's ten root library folders (CollectionFolder / ManualPlaylistsFolder items) rather than collections at all.
So there is no degraded-but-honest pre-12.0 behavior to fall back on: the view would show another library's collections, or a list of libraries. The two failure directions also mean no response shape distinguishes a server that scoped from one that did not (a 10.11 answer is a well-formed 200 with plausible items), which is why the gate is on the SERVER VERSION rather than on anything observable in the reply.
Playlists are not offered alongside, on purpose. Playlist + parentId on 10.11 fails the opposite way (it returns 0 for the library whose films the playlist holds), but the reason to leave it out is not the version: a playlist is user-made and cross-cutting, and a top-level Playlists library already browses it.
Members
(static, constant) MIN_SERVER
The first server line that scopes parentId for BoxSet queries. Below it the same request succeeds and answers wrongly, so this is a gate, not an optimization.
- Default Value
- 12.0.0
(static, constant) VIEW_NAME
The view's Name in a presenter's views list, in the saved landing display setting, and in the viewMode a presenter is configured with. Shared so the presenters, the query branch and the title branch cannot drift apart on spelling.
- Default Value
- Collections
Methods
(static) offeredFor(parentItem, serverVersion) → {boolean}
offeredFor: Whether a grid's View menu lists Collections: on the library itself, and only on a server that scopes the query.
Not inside a studio, network or genre folder, although 12.x answers those queries correctly. A collection's studios and genres are the union of its films', so a folder-scoped list holds every collection with even one film matching, so a mixed collection turns up under a genre most of it is not. The view means "this library's collections" and is offered only where it can mean exactly that.
| Name | Type | Description |
|---|---|---|
parentItem | object | the item the grid is showing |
serverVersion | string | m.global.server.version |
- Type:
- boolean
(static) supported(serverVersion) → {boolean}
supported: Whether this server scopes a per-library BoxSet query.
unknown server is assumed not to scope, so the view is not offered rather than offered and quietly wrong)
| Name | Type | Description |
|---|---|---|
serverVersion | string | m.global.server.version |
false for an empty/unknown version (the conservative answer: an
- Type:
- boolean