keep allowing 0 and convert to null internally

mobile/openapi/lib/model/asset_bulk_update_dto.dart

@@ -94,7 +94,7 @@ class AssetBulkUpdateDto {
 
   /// Rating in range [1-5], or null for unrated
   ///
-  /// Minimum value: 1
+  /// Minimum value: 0
   /// Maximum value: 5
   int? rating;
 

mobile/openapi/lib/model/update_asset_dto.dart

@@ -79,7 +79,7 @@ class UpdateAssetDto {
 
   /// Rating in range [1-5], or null for unrated
   ///
-  /// Minimum value: 1
+  /// Minimum value: 0
   /// Maximum value: 5
   int? rating;
 

open-api/immich-openapi-specs.json

@@ -15692,7 +15692,7 @@
           "rating": {
             "description": "Rating in range [1-5], or null for unrated",
             "maximum": 5,
-            "minimum": 1,
+            "minimum": 0,
             "nullable": true,
             "type": "integer",
             "x-immich-history": [
@@ -25227,7 +25227,7 @@
           "rating": {
             "description": "Rating in range [1-5], or null for unrated",
             "maximum": 5,
-            "minimum": 1,
+            "minimum": 0,
             "nullable": true,
             "type": "integer",
             "x-immich-history": [

server/src/controllers/asset.controller.spec.ts

@@ -214,13 +214,20 @@ describe(AssetController.name, () => {
     });
 
     it('should reject invalid rating', async () => {
-      for (const test of [{ rating: 0 }, { rating: 7 }, { rating: 3.5 }, { rating: -2 }]) {
+      for (const test of [{ rating: 7 }, { rating: 3.5 }, { rating: -2 }]) {
         const { status, body } = await request(ctx.getHttpServer()).put(`/assets/${factory.uuid()}`).send(test);
         expect(status).toBe(400);
         expect(body).toEqual(factory.responses.badRequest());
       }
     });
 
+    it('should convert rating 0 to null', async () => {
+      const assetId = factory.uuid();
+      const { status } = await request(ctx.getHttpServer()).put(`/assets/${assetId}`).send({ rating: 0 });
+      expect(service.update).toHaveBeenCalledWith(undefined, assetId, { rating: null });
+      expect(status).toBe(200);
+    });
+
     it('should leave correct ratings as-is', async () => {
       const assetId = factory.uuid();
       for (const test of [{ rating: 1 }, { rating: 5 }]) {

server/src/dtos/asset.dto.ts

@@ -15,8 +15,9 @@ const UpdateAssetBaseSchema = z
     longitude: longitudeSchema.optional().describe('Longitude coordinate'),
     rating: z
       .int()
-      .min(1)
+      .min(0)
       .max(5)
+      .transform((value) => (value === 0 ? null : value))
       .nullish()
       .describe('Rating in range [1-5], or null for unrated')
       .meta({