From d919c341b12ba1fcc2a3f9bc84b4e98160582990 Mon Sep 17 00:00:00 2001
From: shamoon <4887959+shamoon@users.noreply.github.com>
Date: Thu, 12 Mar 2026 11:57:35 -0700
Subject: [PATCH] Fix: clear descendant selections in dropdown when parent
 toggled (#12326)

---
 .../filterable-dropdown.component.spec.ts     | 53 +++++++++++++++++++
 .../filterable-dropdown.component.ts          | 35 ++++++++++++
 2 files changed, 88 insertions(+)

diff --git a/src-ui/src/app/components/common/filterable-dropdown/filterable-dropdown.component.spec.ts b/src-ui/src/app/components/common/filterable-dropdown/filterable-dropdown.component.spec.ts
index 2ecf95f2b..1763239b1 100644
--- a/src-ui/src/app/components/common/filterable-dropdown/filterable-dropdown.component.spec.ts
+++ b/src-ui/src/app/components/common/filterable-dropdown/filterable-dropdown.component.spec.ts
@@ -631,6 +631,59 @@ describe('FilterableDropdownComponent & FilterableDropdownSelectionModel', () =>
     ])
   })
 
+  it('deselecting a parent clears selected descendants', () => {
+    const root: Tag = { id: 100, name: 'Root Tag' }
+    const child: Tag = { id: 101, name: 'Child Tag', parent: root.id }
+    const grandchild: Tag = {
+      id: 102,
+      name: 'Grandchild Tag',
+      parent: child.id,
+    }
+    const other: Tag = { id: 103, name: 'Other Tag' }
+
+    selectionModel.items = [root, child, grandchild, other]
+    selectionModel.set(root.id, ToggleableItemState.Selected, false)
+    selectionModel.set(child.id, ToggleableItemState.Selected, false)
+    selectionModel.set(grandchild.id, ToggleableItemState.Selected, false)
+    selectionModel.set(other.id, ToggleableItemState.Selected, false)
+
+    selectionModel.toggle(root.id, false)
+
+    expect(selectionModel.getSelectedItems()).toEqual([other])
+  })
+
+  it('un-excluding a parent clears excluded descendants', () => {
+    const root: Tag = { id: 110, name: 'Root Tag' }
+    const child: Tag = { id: 111, name: 'Child Tag', parent: root.id }
+    const other: Tag = { id: 112, name: 'Other Tag' }
+
+    selectionModel.items = [root, child, other]
+    selectionModel.set(root.id, ToggleableItemState.Excluded, false)
+    selectionModel.set(child.id, ToggleableItemState.Excluded, false)
+    selectionModel.set(other.id, ToggleableItemState.Excluded, false)
+
+    selectionModel.exclude(root.id, false)
+
+    expect(selectionModel.getExcludedItems()).toEqual([other])
+  })
+
+  it('excluding a selected parent clears selected descendants', () => {
+    const root: Tag = { id: 120, name: 'Root Tag' }
+    const child: Tag = { id: 121, name: 'Child Tag', parent: root.id }
+    const other: Tag = { id: 122, name: 'Other Tag' }
+
+    selectionModel.manyToOne = true
+    selectionModel.items = [root, child, other]
+    selectionModel.set(root.id, ToggleableItemState.Selected, false)
+    selectionModel.set(child.id, ToggleableItemState.Selected, false)
+    selectionModel.set(other.id, ToggleableItemState.Selected, false)
+
+    selectionModel.exclude(root.id, false)
+
+    expect(selectionModel.getExcludedItems()).toEqual([root])
+    expect(selectionModel.getSelectedItems()).toEqual([other])
+  })
+
   it('resorts items immediately when document count sorting enabled', () => {
     const apple: Tag = { id: 55, name: 'Apple' }
     const zebra: Tag = { id: 56, name: 'Zebra' }
diff --git a/src-ui/src/app/components/common/filterable-dropdown/filterable-dropdown.component.ts b/src-ui/src/app/components/common/filterable-dropdown/filterable-dropdown.component.ts
index ec5425630..bc15e3374 100644
--- a/src-ui/src/app/components/common/filterable-dropdown/filterable-dropdown.component.ts
+++ b/src-ui/src/app/components/common/filterable-dropdown/filterable-dropdown.component.ts
@@ -231,6 +231,7 @@ export class FilterableDropdownSelectionModel {
       state == ToggleableItemState.Excluded
     ) {
       this.temporarySelectionStates.delete(id)
+      this.clearDescendantSelections(id)
     }
 
     if (!id) {
@@ -257,6 +258,7 @@ export class FilterableDropdownSelectionModel {
 
       if (this.manyToOne || this.singleSelect) {
         this.temporarySelectionStates.set(id, ToggleableItemState.Excluded)
+        this.clearDescendantSelections(id)
 
         if (this.singleSelect) {
           for (let key of this.temporarySelectionStates.keys()) {
@@ -277,9 +279,15 @@ export class FilterableDropdownSelectionModel {
           newState = ToggleableItemState.NotSelected
         }
         this.temporarySelectionStates.set(id, newState)
+        if (newState == ToggleableItemState.Excluded) {
+          this.clearDescendantSelections(id)
+        }
       }
     } else if (!id || state == ToggleableItemState.Excluded) {
       this.temporarySelectionStates.delete(id)
+      if (id) {
+        this.clearDescendantSelections(id)
+      }
     }
 
     if (fireEvent) {
@@ -291,6 +299,33 @@ export class FilterableDropdownSelectionModel {
     return this.selectionStates.get(id) || ToggleableItemState.NotSelected
   }
 
+  private clearDescendantSelections(id: number) {
+    for (const descendantID of this.getDescendantIDs(id)) {
+      this.temporarySelectionStates.delete(descendantID)
+    }
+  }
+
+  private getDescendantIDs(id: number): number[] {
+    const descendants: number[] = []
+    const queue: number[] = [id]
+
+    while (queue.length) {
+      const parentID = queue.shift()
+      for (const item of this._items) {
+        if (
+          typeof item?.id === 'number' &&
+          typeof (item as any)['parent'] === 'number' &&
+          (item as any)['parent'] === parentID
+        ) {
+          descendants.push(item.id)
+          queue.push(item.id)
+        }
+      }
+    }
+
+    return descendants
+  }
+
   get logicalOperator(): LogicalOperator {
     return this.temporaryLogicalOperator
   }