fixed, get would fail when key doesn't exist

Former-commit-id: 83ab6ad3ef

src/messenger/persistence/realm.cljs

@@ -55,7 +55,7 @@
   (-> (aget result 0)))
 
 (defn single-cljs [result]
-  (-> (aget result 0)
+  (some-> (aget result 0)
           (js->clj :keywordize-keys true)))
 
 (defn decode-value [{:keys [key value]}]

src/messenger/persistence/simple_kv_store.cljs

@@ -10,7 +10,7 @@
         (r/create :kv-store {:key   key
                              :value (str value)} true))))
   (get [_ key]
-    (-> (r/get-by-field :kv-store :key key)
+    (some-> (r/get-by-field :kv-store :key key)
             (r/single-cljs)
             (r/decode-value)))
   (contains-key? [_ key]