Scheduler: add Multilevel Grouping demo description

[vladaskorohodova]

No description provided.

[Copilot]

🟡 Changes recommended

The new description contains a groupOrientation documentation link that points to the root config section even though the demo configures groupOrientation per-view (should link to Configuration/views/#groupOrientation).

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

Adds end-user documentation for the Scheduler “Multilevel Grouping” demo so the demo gallery can display an explanatory description and configuration guidance.

Changes:

• Added a new description.md for the Scheduler Multilevel Grouping demo.
• Documented how to configure hierarchical (parent/child) resources and how the demo customizes the appointment form.

File summaries

File	Description
apps/demos/Demos/Scheduler/MultilevelGrouping/description.md	New demo description explaining multilevel resource grouping setup and related Scheduler options.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 1
• Review effort level: Lite

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[Copilot]

🟢 Approval recommended

The change is documentation-only for a demo description, with no functional code impact and only minor consistency nits noted.

Review details

Suppressed comments (1)

apps/demos/Demos/Scheduler/MultilevelGrouping/description.md:12

• For consistency with other demo descriptions, avoid wrapping property names in backticks inside markdown link text (for example, use [groupOrientation] instead of [groupOrientation]).

Switch between **Vertical Grouping** and **Horizontal Grouping** to change the layout. Each view sets the [`groupOrientation`](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/views/#groupOrientation) property to control the layout.

The demo also customizes the appointment form in the [`onAppointmentFormOpening`](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/#onAppointmentFormOpening) handler. Select a room to filter the employee list, then assign one or more employees to the appointment. The resource's [`allowMultiple`](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/resources/#allowMultiple) property enables multiple employee selection.

• Files reviewed: 1/1 changed files
• Comments generated: 1
• Review effort level: Lite

[Copilot]

🟢 Approval recommended

The change is a self-contained documentation addition that matches existing demo description conventions and introduces no functional code risk.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 0 new
• Review effort level: Lite

[Copilot]

🟢 Approval recommended

The change is a new demo description file that aligns with the demo’s actual configuration and introduces no functional or behavioral code changes.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 0 new
• Review effort level: Lite

[Copilot]

🟢 Approval recommended

The change is isolated to a new demo description markdown file and introduces no code/runtime behavior changes.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 0 new
• Review effort level: Lite

[Copilot]

🟢 Approval recommended

The change is a straightforward addition of demo documentation content with consistent formatting and links.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 0 new
• Review effort level: Lite

[khamlyuk]

Suggested change

	The DevExtreme Scheduler supports multilevel resource grouping to organize appointments in a hierarchy. The Scheduler groups employees by room in this demo, so you can view each employee's schedule within their assigned room.
	The DevExtreme Scheduler supports multilevel resource grouping to organize appointments as a hierarchy. in In this demo, the Scheduler groups employees by room, so you can view each employee's schedule based on their assigned room.

[khamlyuk]

Suggested change

	- Include parent and child records in the resource's [dataSource](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/resources/#dataSource). This demo uses rooms as parents and employees as children.
	- Add parent and child records in the resource's [dataSource](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/resources/#dataSource). This demo uses rooms as parents and employees as children.

[khamlyuk]

Suggested change

	- Set [parentIdExpr](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/resources/#parentIdExpr) to the field that links each child to its parent. Each employee's `parentId` references a room's `id`.
	- Assign a field that links each child to its parent to the [parentIdExpr](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/resources/#parentIdExpr). In this demo, each employee's `parentId` references a room's `id`.

[khamlyuk]

Suggested change

	- Set the resource's [fieldExpr](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/resources/#fieldExpr) to the appointment field that stores resource IDs, and add that field to the Scheduler’s [groups](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/#groups) array. This demo uses `assigneeId`.
	- Set the resource's [fieldExpr](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/resources/#fieldExpr) to the appointment field that stores resource IDs, and add that field to the Scheduler [groups](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/#groups) array. This demo uses `assigneeId`.

[khamlyuk]

Let's move this part before the splitter.

[khamlyuk]

Suggested change

The demo also customizes the appointment form in the [onAppointmentFormOpening](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/#onAppointmentFormOpening) handler. Select a room to filter the employee list, then assign one or more employees to the appointment. The resource's [allowMultiple](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/resources/#allowMultiple) property enables multiple employee selection.

The demo also customizes the appointment form in the [onAppointmentFormOpening](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/#onAppointmentFormOpening) handler. Select a room to filter the employee list, then assign one or more employees to the appointment. The resource [allowMultiple](/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/resources/#allowMultiple) property enables multiple employee selection.