fix small client bug for edge case where playground pipeline exists with same...

fix small client bug for edge case where playground pipeline exists with same name as the managed pipeline (#10994)

* fix small client bug for edge case where playground pipeline exists with same name as the managed pipeline

* add elif condition as sanity check

* use enum.value

llama-index-integrations/indices/llama-index-indices-managed-llama-cloud/llama_index/indices/managed/llama_cloud/retriever.py

 from typing import Any, Dict, List, Optional
 
 from llama_index_client import TextNodeWithScore
-from llama_index_client.resources.pipeline.client import OMIT
+from llama_index_client.resources.pipeline.client import OMIT, PipelineType
 
 from llama_index.core.base.base_retriever import BaseRetriever
 from llama_index.core.constants import DEFAULT_PROJECT_NAME
@@ -58,13 +58,19 @@ class LlamaCloudRetriever(BaseRetriever):
     def _retrieve(self, query_bundle: QueryBundle) -> List[NodeWithScore]:
         """Retrieve from the platform."""
         pipelines = self._client.pipeline.search_pipelines(
-            project_name=self.project_name, pipeline_name=self.name
+            project_name=self.project_name,
+            pipeline_name=self.name,
+            pipeline_type=PipelineType.MANAGED.value,
         )
-        if len(pipelines) != 1:
+        if len(pipelines) == 0:
             raise ValueError(
                 f"Unknown index name {self.name}. Please confirm a "
                 "managed index with this name exists."
             )
+        elif len(pipelines) > 1:
+            raise ValueError(
+                f"Multiple pipelines found with name {self.name} in project {self.project_name}"
+            )
         pipeline = pipelines[0]
 
         if pipeline.id is None:
@@ -90,9 +96,19 @@ class LlamaCloudRetriever(BaseRetriever):
     async def _aretrieve(self, query_bundle: QueryBundle) -> List[NodeWithScore]:
         """Asynchronously retrieve from the platform."""
         pipelines = await self._aclient.pipeline.search_pipelines(
-            project_name=self.project_name, pipeline_name=self.name
+            project_name=self.project_name,
+            pipeline_name=self.name,
+            pipeline_type=PipelineType.MANAGED.value,
         )
-        assert len(pipelines) == 1
+        if len(pipelines) == 0:
+            raise ValueError(
+                f"Unknown index name {self.name}. Please confirm a "
+                "managed index with this name exists."
+            )
+        elif len(pipelines) > 1:
+            raise ValueError(
+                f"Multiple pipelines found with name {self.name} in project {self.project_name}"
+            )
         pipeline = pipelines[0]
 
         if pipeline.id is None: