Use select for filters.

backend/src/Squidex.Domain.Apps.Core.Operations/GenerateFilters/FilterVisitor.cs

@@ -94,6 +94,17 @@ namespace Squidex.Domain.Apps.Core.GenerateFilters
 
         public FilterSchema? Visit(IField<StringFieldProperties> field, Args args)
         {
+            if (field.Properties.AllowedValues?.Count > 0)
+            {
+                return new FilterSchema(FilterSchemaType.String)
+                {
+                    Extra = new
+                    {
+                        options = field.Properties.AllowedValues
+                    }
+                };
+            }
+
             return FilterSchema.String;
         }
 

backend/src/Squidex.Domain.Apps.Entities/Apps/Commands/CreateApp.cs

@@ -17,8 +17,6 @@ namespace Squidex.Domain.Apps.Entities.Apps.Commands
 
         public string Name { get; set; }
 
-        public string? Template { get; set; }
-
         [IgnoreDataMember]
         public override DomainId AggregateId
         {

frontend/src/app/shared/components/search/queries/filter-comparison.component.html

@@ -39,6 +39,23 @@
                 [ngModel]="filter.value"
                 (ngModelChange)="changeValue($event)" />
         </ng-container>
+        <ng-container *ngSwitchCase="'Reference'">
+            <sqx-reference-input [schemaIds]="field.schema.extra?.schemaIds"
+                mode="Single"
+                [ngModel]="filter.value"
+                (ngModelChange)="changeValue($event)"
+                [language]="language"
+                [languages]="languages">
+            </sqx-reference-input>
+        </ng-container>
+        <ng-container *ngSwitchCase="'Select'">
+            <select class="form-select"
+                [ngModel]="filter.value"
+                (ngModelChange)="changeValue($event)">
+                <option [ngValue]="null"></option>
+                <option *ngFor="let value of field.schema.extra?.options" [ngValue]="value">{{value}}</option>
+            </select>
+        </ng-container>
         <ng-container *ngSwitchCase="'Status'">
             <sqx-dropdown 
                 valueProperty="status"
@@ -51,6 +68,11 @@
                 </ng-template>
             </sqx-dropdown>
         </ng-container>
+        <ng-container *ngSwitchCase="'String'">
+            <input type="text" class="form-control" *ngIf="!field.schema.extra"
+                [ngModel]="filter.value"
+                (ngModelChange)="changeValue($event)" />
+        </ng-container>
         <ng-container *ngSwitchCase="'User'">
             <ng-container *ngIf="contributorsState.isLoaded | async; else noPermission">
                 <sqx-dropdown
@@ -72,25 +94,11 @@
                 </sqx-dropdown>
             </ng-container>
             <ng-template #noPermission>
-                <input type="text" class="form-control" *ngIf="!field.schema.extra"
+                <input type="text" class="form-control"
                     [ngModel]="filter.value"
                     (ngModelChange)="changeValue($event)" />
             </ng-template>
         </ng-container>
-        <ng-container *ngSwitchCase="'String'">
-            <input type="text" class="form-control" *ngIf="!field.schema.extra"
-                [ngModel]="filter.value"
-                (ngModelChange)="changeValue($event)" />
-        </ng-container>
-        <ng-container *ngSwitchCase="'Reference'">
-            <sqx-reference-input [schemaIds]="field.schema.extra?.schemaIds"
-                mode="Single"
-                [ngModel]="filter.value"
-                (ngModelChange)="changeValue($event)"
-                [language]="language"
-                [languages]="languages">
-            </sqx-reference-input>
-        </ng-container>
         <ng-container *ngSwitchCase="'Unsupported'">
             {{ 'common.notSupported' | sqxTranslate }}
         </ng-container>

frontend/src/app/shared/services/query.ts

@@ -26,6 +26,7 @@ export type FilterFieldUI =
     'Reference' |
     'None' |
     'Number' |
+    'Select' |
     'String' |
     'Status' |
     'Unsupported' |
@@ -52,6 +53,8 @@ export function getFilterUI(comparison: FilterComparison, field: FilterableField
         return 'Status';
     } else if (type === 'String' && extra?.editor === 'User') {
         return 'User';
+    } else if (type === 'String' && extra?.options) {
+        return 'Select';
     } else if (type === 'String') {
         return 'String';
     } else if (type === 'StringArray' && extra?.schemaIds) {