From 9e40309e5bfc54f5f71178cf90d37ebcf8dd8dca Mon Sep 17 00:00:00 2001
From: Eduardo San Martin Morote <posva13@gmail.com>
Date: Sun, 5 Sep 2021 20:18:08 +0200
Subject: [PATCH] fix: correctly set the store properties in Vue 2

Fix #657
---
 packages/pinia/src/store.ts | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/packages/pinia/src/store.ts b/packages/pinia/src/store.ts
index 66cd9eb5..b77f1f2f 100644
--- a/packages/pinia/src/store.ts
+++ b/packages/pinia/src/store.ts
@@ -491,7 +491,18 @@ function createSetupStore<
   }
 
   // add the state, getters, and action properties
-  assign(store, setupStore)
+  if (isVue2) {
+    Object.keys(setupStore).forEach((key) => {
+      set(
+        store,
+        key,
+        // @ts-expect-error: valid key indexing
+        setupStore[key]
+      )
+    })
+  } else {
+    assign(store, setupStore)
+  }
 
   // use this instead of a computed with setter to be able to create it anywhere
   // without linking the computed lifespan to wherever the store is first
-- 
2.47.3