Develop Reference

how fire upgradeneeded event with out upgrade version of the indedexdb

i have a question about the event "upgradeneeded".
i need to check the data base every time the user reload the page, but how to fire it with out upgrade the version of the indexeddb, or it's the unique solution ?
request.addEventListener('upgradeneeded', event => {
var db = event.target.result;
var planningObjectStore = db.transaction("planningSave", "read").objectStore("planningSave");
});

"upgradeneeded" is only fired when you need to change the schema, which you signal by changing the version number. If you're not modifying the schema - e.g. you're just reading/writing to existing object stores - use the "success" event instead. Also, there's an implicit transaction within the "upgradeneeded" event, so no need to call transaction() there.
var request = indexedDB.open("mydb", 1); // version 1
// only fires for newly created databases, before "success"
request.addEventListener("upgradeneeded", event => {
var db = event.target.result;
var planningObjectStore = db.createObjectStore("planningSave");
// write initial data into the store
});
// fires after any successful open of the database
request.addEventListener("success", event => {
var db = event.target.result;
var tx = db.transaction("planningSave");
var planningObjectStore = tx.objectStore("planningSave");
// read data within the new transaction
});

Create index on already existing objectStore

As an example on basic setup one index is created.
db.onupgradeneeded = function(event) {
var db = event.target.result;
var store = db.createObjectStore('name', { keyPath: 'id' });
store.createIndex('by name', 'name', { unique: false });
};
Question:
Is it possible to create/append more indexes to the same objectStore on the future versionupdate? Since if I try:
db.onupgradeneeded = function(event) {
var db = event.target.result;
var store = db.createObjectStore('name', { keyPath: 'id' });
store.createIndex('by newName', 'newName', { unique: false });
};
It throws an error that current objectStore does already exist. An if I try to create store reference using transaction:
db.onupgradeneeded = function(event) {
var db = event.target.result;
var store = db.transaction('name', 'readwrite').objectStore('name');
store.createIndex('by newName', 'newName', { unique: false });
};
It throws that version change transaction is currently running

Yes it is possible. It can be a bit confusing at first. You want to get the existing object store via the implicit transaction created for you within onupgradeneeded. This is a transaction of type versionchange which is basically like a readwrite transaction but specific to the onupgradeneeded handler function.
Something like this:
var request = indexedDB.open(name, oldVersionPlusOne);
request.onupgradeneeded = myOnUpgradeNeeded;
function myOnUpgradeNeeded(event) {
// Get a reference to the request related to this event
// #type IDBOpenRequest (a specialized type of IDBRequest)
var request = event.target;
// Get a reference to the IDBDatabase object for this request
// #type IDBDatabase
var db = request.result;
// Get a reference to the implicit transaction for this request
// #type IDBTransaction
var txn = request.transaction;
// Now, get a reference to the existing object store
// #type IDBObjectStore
var store = txn.objectStore('myStore');
// Now, optionally inspect index names, or create a new index
console.log('existing index names in store', store.indexNames);
// Add a new index to the existing object store
store.createIndex(...);
}
You also will want to take care to increment the version so as to guarantee the onupgradeneeded handler function is called, and to represent that your schema (basically the set of tables and indices and properties of things) has changed in the new version.
You will also need to rewrite the function so that you only create or make changes based on the version. You can use event.oldVersion to help with this, or things like db.objectStoreNames.contains.
Something like this:
function myOnUpgradeNeeded(event) {
var is_new_db = isNaN(event.oldVersion) || event.oldVersion === 0;
if(is_new_db) {
var db = event.target.result;
var store = db.createObjectStore(...);
store.createIndex('my-initial-index');
// Now that you decided you want a second index, you also need
// to do this for brand new databases
store.createIndex('my-second-new-index');
}
// But if the database already exists, we are not creating things,
// instead we are modifying the existing things to get into the
// new state of things we want
var is_old_db_not_yet_current_version = !isNaN(event.oldVersion) && event.oldVersion < 2;
if(is_old_db_not_yet_current_version) {
var txn = event.target.transaction;
var store = txn.objectStore('store');
store.createIndex('my-second-new-index');
}
}
Pay close attention to the fact that I used event.target.transaction instead of db.transaction(...). These are not at all the same thing. One references an existing transaction, and one creates a new one.
Finally, and in addition, a personal rule of mine and not a formal coding requirement, you should never be using db.transaction() from within onupgradeneeded. Stick to modifying the schema when doing upgrades, and do all data changes outside of it.

Safari: IndexedDB: Cannot create object stores in separate transactions

It appears that the Safari and iPhone web browsers are incapable of allowing the user to create different object stores from separate transactions. This is even the case when the user closes the database, increments the version number and then uses createObjectStore() within the onupgradedneeded callback.
Is there a workaround?
For example, visit http://bl.ocks.org/redgeoff/1dea140c52397d963377 in Safari and you'll get an alert with the "AbortError" when Safari attempts to create the 2nd object store.
For convenience, here is the same snippet of code:
var idb = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB
|| window.msIndexedDB;
// Generate a unique db name as IndexedDB is very delicate and we want our test
// to focus on a new DB
var dbName = 'mydb' + '_' + (new Date()).getTime() + '_'
+ Math.round(1000000*Math.random());
var db = null;
var version = 1;
var open = function (version, onSuccess, onUpgradeNeeded) {
var request = null;
if (version) {
request = idb.open(dbName, version);
} else { // 1st time opening?
request = idb.open(dbName);
}
request.onupgradeneeded = function () {
if (onUpgradeNeeded) {
onUpgradeNeeded(request);
}
};
request.onsuccess = function () {
db = request.result;
if (onSuccess) {
onSuccess(request);
}
};
request.onerror = function () {
console.log('error=', request.error);
alert('error=' + JSON.stringify(request.error));
};
};
var createObjectStore = function (name, callback) {
db.close(); // synchronous
version++; // increment version to trigger onupgradeneeded
open(version, callback, function (request) {
request.result.createObjectStore(name, {
keyPath: 'id'
});
});
};
// NOTE: we could create the first store when opening the DB for the first time, but we'll keep
// things simple and reuse our createObjectStore code for both object stores
open(null, function () {
createObjectStore('store1', function () {
createObjectStore('store2', function () {
console.log('done creating both stores');
});
});
});
I tried using a sleep of 2 secs after the DB is closed and reopened and that doesn't appear to work. If there is no workaround then this essentially means that you cannot use the IndexedDB implementation in Safari to dynamically create object stores, which means that you need to know all your object stores before creating a DB.

Unless I am mistaken and someone has a workaround, the best way to dynamically add object stores is to implement a db-per-object-store design. In other words, you should create a new database whenever you need to create a new object store.
Another good option is to use https://github.com/axemclion/IndexedDBShim to emulate IndexedDB with WebSQL.

Deleting item in IndexedDB while using autoIncrement

I am trying to implement this example.
Everything works fine until I attempt to delete a certain item.
Using this:
request.onupgradeneeded = function(event) {
console.log("upgrade", event);
db = event.target.result;
console.log("db", db);
if (!db.objectStoreNames.contains("chatBot")) {
var objectStore = db.createObjectStore("chatBot", {keyPath: "timeStamp", autoIncrement: true});
}
};
and setting up the deletion:
btnDelete.addEventListener("click", function() {
var id, transaction, objectStore, request;
id = document.getElementById("txtID").value;
console.log("id", typeof id);
transaction = db.transaction("people", "readwrite");
objectStore = transaction.objectStore("people");
request = objectStore.delete(id);
request.onsuccess = function(evt) {
console.log("deleted content");
};
}, false);
There is no problem adding items to the indexedDB but for some reason I can't figure out why it can't delete the items.
The id is a string and the objectStore.delete(id) is the correct implementation.
Here is a pastebin of the example
Using Firefox 18

Since you are using autoIncrement key, the key is generated by the user agent. In FF and Chrome, it is integer starting with 1. If you give valid key and convert your id to integer, your code run fine. I tested in both FF and Chrome (dartium). '1' and 1 are different keys according to IndexedDB API key definition.
Another issue IndexedDB API design. The delete methods always return to success event handler with undefined as result whether given key was deleted or not. So it is very difficult to debug. I think it should return number of deleted records at least.
[Edit] mod code: http://pastebin.com/mLpU0VfP
[Edit... also] Notice the + which converts the string to an integer
request = db.transaction("people", "readwrite").objectStore("people").delete(+id);

How do I update data in indexedDB?

I have tried to get some information from W3C regarding the update of an objectStore item in a indexedDB database, but with not so much susccess.
I found here a way to do it, but it doesn't really work for me.
My implementation is something like this
DBM.activitati.edit = function(id, obj, callback){
var transaction = DBM.db.transaction(["activitati"], IDBTransaction.READ_WRITE);
var objectStore = transaction.objectStore("activitati");
var keyRange = IDBKeyRange.only(id);
objCursor = objectStore.openCursor(keyRange);
objCursor.onsuccess = function(e){
var cursor = e.target.result;
console.log(obj);
var request = cursor.update(obj);
request.onsuccess = function(){
callback();
}
request.onerror = function(e){
conosole.log("DBM.activitati.edit -> error " + e);
}
}
objCursor.onerror = function(e){
conosole.log("DBM.activitati.edit -> error " + e);
}
}
I have all DBM.activitati.(add | remove | getAll | getById | getByIndex) methods working, but I can not resolve this.
If you know how I can manage it, please, do tell!
Thank you!

Check out this jsfiddle for some examples on how to update IDB records. I worked on that with another StackOverflower -- it's a pretty decent standalone example of IndexedDB that uses indexes and does updates.
The method you seem to be looking for is put, which will either insert or update a record if there are unique indexes. In that example fiddle, it's used like this:
phodaDB.indexedDB.addUser = function(userObject){
//console.log('adding entry: '+entryTxt);
var db = phodaDB.indexedDB.db;
var trans = db.transaction(["userData"],IDBTransaction.READ_WRITE);
var store = trans.objectStore("userData");
var request = store.put(userObject);
request.onsuccess = function(e){
phodaDB.indexedDB.getAllEntries();
};
request.onerror = function(e){
console.log('Error adding: '+e);
};
};
For what it's worth, you've got some possible syntax errors, misspelling "console" in console.log as "conosole".

A bit late for an answer, but possible it helps others. I still stumbled -as i guess- over the same problem, but it's very simple:
If you want to INSERT or UPDATE records you use objectStore.put(object) (help)
If you only want to INSERT records you use objectStore.add(object) (help)
So if you use add(object), and a record key still exists in DB, it will not overwritten and fires error 0 "ConstraintError: Key already exists in the object store".
If you use put(object), it will be overwritten.

this is case of update infos of an user object
var transaction = db.transaction(["tab_user"], "readwrite");
var store = transaction.objectStore("tab_user");
var req = store.openCursor();
req.onerror = function(event) {
console.log("case if have an error");
};
req.onsuccess = function(event) {
var cursor = event.target.result;
if(cursor){
if(cursor.value.idUser == users.idUser){//we find by id an user we want to update
var user = {};
user.idUser = users.idUser ;
user.nom = users.nom ;
var res = cursor.update(user);
res.onsuccess = function(e){
console.log("update success!!");
}
res.onerror = function(e){
console.log("update failed!!");
}
}
cursor.continue();
}
else{
console.log("fin mise a jour");
}
}

I'm a couple of years late, but thought it'd be nice to add my two cents in.
First, check out BakedGoods if you don't want to deal with the complex IndexedDB API.
It's a library which establishes a uniform interface that can be used to conduct storage operations in all native, and some non-native client storage facilities. It also maintains the flexibility and options afforded to the user by each. Oh, and it's maintained by yours truly :) .
With it, placing one or more data items in an object store can be as simple as:
bakedGoods.set({
data: [{key: "key1", value: "value1"}, {key: "key2", value: "value2"}),
storageTypes: ["indexedDB"],
complete: function(byStorageTypeResultDataObj, byStorageTypeErrorObj){}
});
Now to answer the actual question...
Lets begin by aggregating the valuable information spread across the existing answers:
IDBObjectStore.put() adds a new record to the store, or updates an existing one
IDBObjectStore.add() adds a new record to the store
IDBCursor.update() updates the record at the current position of the cursor
As one can see, OP is using an appropriate method to update a record. There are, however, several things in his/her code, unrelated to the method, that are incorrect (with respect to the API today at least). I've identified and corrected them below:
var cursorRequest = objectStore.openCursor(keyRange); //Correctly define result as request
cursorRequest.onsuccess = function(e){ //Correctly set onsuccess for request
var objCursor = cursorRequest.result; //Get cursor from request
var obj = objCursor.value; //Get value from existing cursor ref
console.log(obj);
var request = objCursor.update(obj);
request.onsuccess = function(){
callback();
}
request.onerror = function(e){
console.log("DBM.activitati.edit -> error " + e); //Use "console" to log :)
}
}
cursorRequest.onerror = function(e){ //Correctly set onerror for request
console.log("DBM.activitati.edit -> error " + e); //Use "console" to log :)
}