From ed48b0093c2a58caf8bb4548cceb13eeaf5f1378 Mon Sep 17 00:00:00 2001
From: Eduardo San Martin Morote <posva13@gmail.com>
Date: Sun, 12 Sep 2021 12:15:36 +0200
Subject: [PATCH] fix(vue2): delay getters until stores are ready when cross
 using them

---
 packages/pinia/src/store.ts | 14 ++++++++++++++
 packages/pinia/src/types.ts |  8 ++++++++
 2 files changed, 22 insertions(+)

diff --git a/packages/pinia/src/store.ts b/packages/pinia/src/store.ts
index e695d85e..06a1aad5 100644
--- a/packages/pinia/src/store.ts
+++ b/packages/pinia/src/store.ts
@@ -129,6 +129,10 @@ function createOptionsStore<
             setActivePinia(pinia)
             // it was created just before
             const store = pinia._s.get(id)!
+
+            // allow cross using stores
+            if (isVue2 && store._r) return
+
             // @ts-expect-error
             // return getters![name].call(context, context)
             // TODO: avoid reading the getter while assigning with a global variable
@@ -404,6 +408,11 @@ function createSetupStore<
     $dispose,
   } as StoreWithState<Id, S, G, A>
 
+  if (isVue2) {
+    // start as non ready
+    partialStore._r = false
+  }
+
   const store: Store<Id, S, G, A> = reactive(
     assign(
       __DEV__ && IS_CLIENT
@@ -624,6 +633,11 @@ function createSetupStore<
     }
   }
 
+  if (isVue2) {
+    // mark the store as ready before pluginsn
+    store._r = true
+  }
+
   // apply all plugins
   pinia._p.forEach((extender) => {
     /* istanbul ignore else */
diff --git a/packages/pinia/src/types.ts b/packages/pinia/src/types.ts
index 04d2b3cf..893eb923 100644
--- a/packages/pinia/src/types.ts
+++ b/packages/pinia/src/types.ts
@@ -421,6 +421,14 @@ export interface StoreWithState<
    * e.g. devtools plugin stops displaying disposed stores from devtools.
    */
   $dispose(): void
+
+  /**
+   * Vue 2 only. Is the store ready. Used for store cross usage. Getters automatically compute when they are added to
+   * the store, before the store is actually ready, this allows to avoid calling the computed function yet.
+   *
+   * @internal
+   */
+  _r?: boolean
 }
 
 /**
-- 
2.47.3