Delete previous idb and upgrade for v3 (#1112)

* Delete previous idb and upgrade for v3 * Less than 2, delete previous object store * Handle no object store
GoogleChrome · Dec 8, 2017 · a53b3d2 · a53b3d2
1 parent fab630f
commit a53b3d2
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/packages/workbox-precaching/models/PrecachedDetailsModel.mjs b/packages/workbox-precaching/models/PrecachedDetailsModel.mjs
@@ -38,8 +38,15 @@ class PrecachedDetailsModel {
    */
   constructor(cacheName) {
     this._cacheName = cacheNames.getPrecacheName(cacheName);
-    this._db = new DBWrapper(`workbox-precaching`, 1, {
+    this._db = new DBWrapper(`workbox-precaching`, 2, {
       onupgradeneeded: (evt) => {
+        if (evt.oldVersion < 2) {
+          try {
+            evt.target.result.deleteObjectStore('workbox-precaching');
+          } catch (err) {
+            // NOOP
+          }
+        }
         evt.target.result.createObjectStore(DB_STORE_NAME);
       },
     });