From a6848220c7860a790344062d62bf671b470e212a Mon Sep 17 00:00:00 2001
From: jehon <jehon@localhost.net>
Date: Wed, 30 Oct 2013 21:01:39 +0100
Subject: [PATCH] Adding global listener for errors This function will be
 called whenever a Deferred is ending in "fail".

---
 docs/README.md          |  6 ++++++
 src/jquery.indexeddb.js | 19 ++++++++++++++-----
 2 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/docs/README.md b/docs/README.md
index 6e2d5ec..bd09e41 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -44,6 +44,12 @@ var dbOpenPromise = $.indexedDB("database_name", {
 			var obj2 = transaction.createObjectStore(store2);
 			obj1.createIndex("index");
 		}
+	},
+	"onError" : function(error, event) {
+	    // (Additional) Function called whenever you receive an error on any Deferred
+	    // This function come in handy in the development phase, when you don't specify
+	    // all the "fail" handler, and still get a lot of trouble. You better specify a function
+	    // here when starting a new development.
 	}
 });
 ```
diff --git a/src/jquery.indexeddb.js b/src/jquery.indexeddb.js
index 4486359..dce0ff2 100644
--- a/src/jquery.indexeddb.js
+++ b/src/jquery.indexeddb.js
@@ -55,9 +55,18 @@
 			}
 
 
+            function getDeferred(fn) {
+                return $.Deferred(function(dfd) {
+                    if (config && typeof(config.onError) == "function") {
+                        dfd.fail(config.onError);
+                    }
+                    fn(dfd);
+                })
+            }
+
 			var wrap = {
 				"request": function(req, args) {
-					return $.Deferred(function(dfd) {
+					return getDeferred(function(dfd) {
 						try {
 							var idbRequest = typeof req === "function" ? req(args) : req;
 							idbRequest.onsuccess = function(e) {
@@ -187,7 +196,7 @@
 				},
 
 				"cursor": function(idbCursor, callback) {
-					return $.Deferred(function(dfd) {
+					return getDeferred(function(dfd) {
 						try {
 							console.log("Cursor request created", idbCursor);
 							var cursorReq = typeof idbCursor === "function" ? idbCursor() : idbCursor;
@@ -336,7 +345,7 @@
 				"deleteDatabase": function() {
 					// Kinda looks ugly coz DB is opened before it needs to be deleted. 
 					// Blame it on the API 
-					return $.Deferred(function(dfd) {
+					return getDeferred(function(dfd) {
 						dbPromise.then(function(db, e) {
 							db.close();
 							wrap.request(function() {
@@ -358,7 +367,7 @@
 				"transaction": function(storeNames, mode) {
 					!$.isArray(storeNames) && (storeNames = [storeNames]);
 					mode = getDefaultTransaction(mode);
-					return $.Deferred(function(dfd) {
+					return getDeferred(function(dfd) {
 						dbPromise.then(function(db, e) {
 							var idbTransaction;
 							try {
@@ -397,7 +406,7 @@
 						result = {};
 
 					function op(callback) {
-						return $.Deferred(function(dfd) {
+						return getDeferred(function(dfd) {
 							function onTransactionProgress(trans, callback) {
 								try {
 									console.log("Finally, returning the object store", trans);