fix(medusa): allow filtering collections by handle (#2482)

.changeset/polite-emus-explain.md

@@ -0,0 +1,5 @@
+---
+"@medusajs/medusa": patch
+---
+
+fix(medusa): allow filtering collections by handle

packages/medusa/src/api/routes/store/collections/list-collections.ts

@@ -1,4 +1,4 @@
-import { IsInt, IsOptional, ValidateNested } from "class-validator"
+import { IsArray, IsInt, IsOptional, ValidateNested } from "class-validator"
 
 import { DateComparisonOperator } from "../../../../types/common"
 import ProductCollectionService from "../../../../services/product-collection"
@@ -120,6 +120,10 @@ export default async (req, res) => {
 }
 
 export class StoreGetCollectionsParams {
+  @IsOptional()
+  @IsArray()
+  handle?: string[]
+
   @IsOptional()
   @IsInt()
   @Type(() => Number)