diff --git a/src/datasources/designer-api.ts b/src/datasources/designer-api.ts
index bdb2f57..aa8d5d2 100644
--- a/src/datasources/designer-api.ts
+++ b/src/datasources/designer-api.ts
@@ -10,9 +10,14 @@ export class DesignerAPI extends BaseSQLDataSource {
 
   constructor(options: DataSourceOptions, config) {
     super(options, config);
-    this.loader = new DataLoader((keys: number[]) =>
-      this.getDesigners(undefined, keys),
-    );
+    this.loader = new DataLoader(async (keys: number[]) => {
+      const designersResult = await this.getDesigners(undefined, keys);
+      return keys.map(
+        (key) =>
+          designersResult.find((designerResult) => designerResult.id === key) ??
+          null,
+      );
+    });
   }
 
   async getDesignerById(id: number): Promise<Designer> {