From 4679a042794070294641b8f35a25b33b29e5044d Mon Sep 17 00:00:00 2001
From: Guillaume Chau <guillaume.b.chau@gmail.com>
Date: Mon, 19 Aug 2024 20:04:58 +0200
Subject: [PATCH] fix: reuse previous result, fix #1483 (#1569)

---
 packages/vue-apollo-composable/src/useQuery.ts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/packages/vue-apollo-composable/src/useQuery.ts b/packages/vue-apollo-composable/src/useQuery.ts
index a56a3c73..92544691 100644
--- a/packages/vue-apollo-composable/src/useQuery.ts
+++ b/packages/vue-apollo-composable/src/useQuery.ts
@@ -341,7 +341,13 @@ export function useQueryImpl<
   }
 
   function processNextResult (queryResult: ApolloQueryResult<TResult>) {
-    result.value = queryResult.data && Object.keys(queryResult.data).length === 0 ? undefined : queryResult.data
+    result.value = queryResult.data && Object.keys(queryResult.data).length === 0
+      ? queryResult.error &&
+        !currentOptions.value?.returnPartialData &&
+        currentOptions.value?.errorPolicy === 'none'
+        ? undefined
+        : result.value
+      : queryResult.data
     loading.value = queryResult.loading
     networkStatus.value = queryResult.networkStatus
     // Wait for handlers to be registered