refactor: Delete the dataset to verify whether it is in use (#5112)

api/controllers/service_api/dataset/dataset.py

@@ -4,7 +4,7 @@ from werkzeug.exceptions import NotFound
 
 import services.dataset_service
 from controllers.service_api import api
-from controllers.service_api.dataset.error import DatasetNameDuplicateError
+from controllers.service_api.dataset.error import DatasetInUseError, DatasetNameDuplicateError
 from controllers.service_api.wraps import DatasetApiResource
 from core.model_runtime.entities.model_entities import ModelType
 from core.provider_manager import ProviderManager
@@ -113,10 +113,13 @@ class DatasetApi(DatasetApiResource):
 
         dataset_id_str = str(dataset_id)
 
-        if DatasetService.delete_dataset(dataset_id_str, current_user):
-            return {'result': 'success'}, 204
-        else:
-            raise NotFound("Dataset not found.")
+        try:
+            if DatasetService.delete_dataset(dataset_id_str, current_user):
+                return {'result': 'success'}, 204
+            else:
+                raise NotFound("Dataset not found.")
+        except services.errors.dataset.DatasetInUseError:
+            raise DatasetInUseError()
 
 api.add_resource(DatasetListApi, '/datasets')
 api.add_resource(DatasetApi, '/datasets/<uuid:dataset_id>')

api/controllers/service_api/dataset/error.py

@@ -71,3 +71,9 @@ class InvalidMetadataError(BaseHTTPException):
     error_code = 'invalid_metadata'
     description = "The metadata content is incorrect. Please check and verify."
     code = 400
+
+
+class DatasetInUseError(BaseHTTPException):
+    error_code = 'dataset_in_use'
+    description = "The dataset is being used by some apps. Please remove the dataset from the apps before deleting it."
+    code = 409