Fixes #20759: Group object types by app in permission form

Modified the ObjectPermissionForm to use optgroups for organizing
object types by application. This shortens the display names (e.g.,
"permission" instead of "Authentication and Authorization | permission")
while maintaining clear organization through visual grouping.

Changes:
- Updated get_object_types_choices() to return nested optgroup structure
- Enhanced AvailableOptions and SelectedOptions widgets to handle optgroups
- Modified TypeScript moveOptions to preserve optgroup structure
- Added hover text showing full model names
- Styled optgroups with bold, padded labels

netbox/project-static/src/buttons/moveOptions.ts

@@ -1,7 +1,7 @@
 import { getElements } from '../util';
 
 /**
- * Move selected options from one select element to another.
+ * Move selected options from one select element to another, preserving optgroup structure.
  *
  * @param source Select Element
  * @param target Select Element
@@ -9,14 +9,42 @@ import { getElements } from '../util';
 function moveOption(source: HTMLSelectElement, target: HTMLSelectElement): void {
   for (const option of Array.from(source.options)) {
     if (option.selected) {
-      target.appendChild(option.cloneNode(true));
+      // Check if option is inside an optgroup
+      const parentOptgroup = option.parentElement as HTMLElement;
+
+      if (parentOptgroup.tagName === 'OPTGROUP') {
+        // Find or create matching optgroup in target
+        const groupLabel = parentOptgroup.getAttribute('label');
+        let targetOptgroup = Array.from(target.children).find(
+          child => child.tagName === 'OPTGROUP' && child.getAttribute('label') === groupLabel,
+        ) as HTMLOptGroupElement;
+
+        if (!targetOptgroup) {
+          // Create new optgroup in target
+          targetOptgroup = document.createElement('optgroup');
+          targetOptgroup.setAttribute('label', groupLabel!);
+          target.appendChild(targetOptgroup);
+        }
+
+        // Move option to target optgroup
+        targetOptgroup.appendChild(option.cloneNode(true));
+      } else {
+        // Option is not in an optgroup, append directly
+        target.appendChild(option.cloneNode(true));
+      }
+
       option.remove();
+
+      // Clean up empty optgroups in source
+      if (parentOptgroup.tagName === 'OPTGROUP' && parentOptgroup.children.length === 0) {
+        parentOptgroup.remove();
+      }
     }
   }
 }
 
 /**
- * Move selected options of a select element up in order.
+ * Move selected options of a select element up in order, respecting optgroup boundaries.
  *
  * Adapted from:
  * @see https://www.tomred.net/css-html-js/reorder-option-elements-of-an-html-select.html
@@ -27,14 +55,21 @@ function moveOptionUp(element: HTMLSelectElement): void {
   for (let i = 1; i < options.length; i++) {
     const option = options[i];
     if (option.selected) {
-      element.removeChild(option);
-      element.insertBefore(option, element.options[i - 1]);
+      const parent = option.parentElement as HTMLElement;
+      const previousOption = element.options[i - 1];
+      const previousParent = previousOption.parentElement as HTMLElement;
+
+      // Only move if previous option is in the same parent (optgroup or select)
+      if (parent === previousParent) {
+        parent.removeChild(option);
+        parent.insertBefore(option, previousOption);
+      }
     }
   }
 }
 
 /**
- * Move selected options of a select element down in order.
+ * Move selected options of a select element down in order, respecting optgroup boundaries.
  *
  * Adapted from:
  * @see https://www.tomred.net/css-html-js/reorder-option-elements-of-an-html-select.html
@@ -43,12 +78,18 @@ function moveOptionUp(element: HTMLSelectElement): void {
 function moveOptionDown(element: HTMLSelectElement): void {
   const options = Array.from(element.options);
   for (let i = options.length - 2; i >= 0; i--) {
-    let option = options[i];
+    const option = options[i];
     if (option.selected) {
-      let next = element.options[i + 1];
-      option = element.removeChild(option);
-      next = element.replaceChild(option, next);
-      element.insertBefore(next, option);
+      const parent = option.parentElement as HTMLElement;
+      const nextOption = element.options[i + 1];
+      const nextParent = nextOption.parentElement as HTMLElement;
+
+      // Only move if next option is in the same parent (optgroup or select)
+      if (parent === nextParent) {
+        const optionClone = parent.removeChild(option);
+        const nextClone = parent.replaceChild(optionClone, nextOption);
+        parent.insertBefore(nextClone, optionClone);
+      }
     }
   }
 }

netbox/project-static/styles/transitional/_forms.scss

@@ -32,3 +32,14 @@ form.object-edit {
     border: 1px solid $red;
   }
 }
+
+// Make optgroup labels sticky when scrolling through select elements
+select[multiple] {
+  optgroup {
+    position: sticky;
+    top: 0;
+    background-color: var(--bs-body-bg);
+    font-weight: bold;
+    padding: 0.25rem 0.5rem;
+  }
+}

netbox/users/forms/model_forms.py

@@ -283,10 +283,41 @@ class GroupForm(forms.ModelForm):
 
 
 def get_object_types_choices():
-    return [
-        (ot.pk, str(ot))
-        for ot in ObjectType.objects.filter(OBJECTPERMISSION_OBJECT_TYPES).order_by('app_label', 'model')
-    ]
+    """
+    Generate choices for object types grouped by app label using optgroups.
+    Returns nested structure: [(app_label, [(id, model_name), ...]), ...]
+    """
+    from django.apps import apps
+
+    choices = []
+    current_app = None
+    current_group = []
+
+    for ot in ObjectType.objects.filter(OBJECTPERMISSION_OBJECT_TYPES).order_by('app_label', 'model'):
+        # Get verbose app label (e.g., "NetBox Branching" instead of "netbox_branching")
+        try:
+            app_config = apps.get_app_config(ot.app_label)
+            app_label = app_config.verbose_name
+        except LookupError:
+            app_label = ot.app_label
+
+        # Start new optgroup when app changes
+        if current_app != app_label:
+            if current_group:
+                choices.append((current_app, current_group))
+            current_app = app_label
+            current_group = []
+
+        # Add model to current group using just the model's verbose name
+        model_class = ot.model_class()
+        model_name = model_class._meta.verbose_name if model_class else ot.model
+        current_group.append((ot.pk, model_name.title()))
+
+    # Add final group
+    if current_group:
+        choices.append((current_app, current_group))
+
+    return choices
 
 
 class ObjectPermissionForm(forms.ModelForm):

netbox/utilities/forms/widgets/select.py

@@ -72,9 +72,22 @@ class AvailableOptions(forms.SelectMultiple):
     will be empty.) Employed by SplitMultiSelectWidget.
     """
     def optgroups(self, name, value, attrs=None):
-        self.choices = [
-            choice for choice in self.choices if str(choice[0]) not in value
-        ]
+        # Handle both flat choices and optgroup choices
+        filtered_choices = []
+        for choice in self.choices:
+            # Check if this is an optgroup (nested tuple) or flat choice
+            if isinstance(choice[1], (list, tuple)):
+                # This is an optgroup: (group_label, [(id, name), ...])
+                group_label, group_choices = choice
+                filtered_group = [c for c in group_choices if str(c[0]) not in value]
+                if filtered_group:  # Only include optgroup if it has choices left
+                    filtered_choices.append((group_label, filtered_group))
+            else:
+                # This is a flat choice: (id, name)
+                if str(choice[0]) not in value:
+                    filtered_choices.append(choice)
+
+        self.choices = filtered_choices
         value = []  # Clear selected choices
         return super().optgroups(name, value, attrs)
 
@@ -86,6 +99,12 @@ class AvailableOptions(forms.SelectMultiple):
 
         return context
 
+    def create_option(self, name, value, label, selected, index, subindex=None, attrs=None):
+        option = super().create_option(name, value, label, selected, index, subindex, attrs)
+        # Add title attribute to show full text on hover
+        option['attrs']['title'] = label
+        return option
+
 
 class SelectedOptions(forms.SelectMultiple):
     """
@@ -93,12 +112,31 @@ class SelectedOptions(forms.SelectMultiple):
     will include _all_ choices.) Employed by SplitMultiSelectWidget.
     """
     def optgroups(self, name, value, attrs=None):
-        self.choices = [
-            choice for choice in self.choices if str(choice[0]) in value
-        ]
+        # Handle both flat choices and optgroup choices
+        filtered_choices = []
+        for choice in self.choices:
+            # Check if this is an optgroup (nested tuple) or flat choice
+            if isinstance(choice[1], (list, tuple)):
+                # This is an optgroup: (group_label, [(id, name), ...])
+                group_label, group_choices = choice
+                filtered_group = [c for c in group_choices if str(c[0]) in value]
+                if filtered_group:  # Only include optgroup if it has choices left
+                    filtered_choices.append((group_label, filtered_group))
+            else:
+                # This is a flat choice: (id, name)
+                if str(choice[0]) in value:
+                    filtered_choices.append(choice)
+
+        self.choices = filtered_choices
         value = []  # Clear selected choices
         return super().optgroups(name, value, attrs)
 
+    def create_option(self, name, value, label, selected, index, subindex=None, attrs=None):
+        option = super().create_option(name, value, label, selected, index, subindex, attrs)
+        # Add title attribute to show full text on hover
+        option['attrs']['title'] = label
+        return option
+
 
 class SplitMultiSelectWidget(forms.MultiWidget):
     """