using data from multiple indexeddb objectstores

Question

I have 2 objectstores in 1 indexeddb database. I can add, retrieve, show and delete the records from either without a problem.

However, what I cannot do is keep the data alive in some way after the transaction ends on one objectstore so I can use it together with the data from the second objectstore.

For example comparing values from one store to the other.

I have assigned arrays in each transaction and pushed the results into those arrays but when I come out of the transaction everything becomes undefined.

I am so tired of looking at 1 page "todo list" examples.

Maybe there isn't a way to do what I am trying. I had it working perfectly using websql but that's out now. If there is a way can someone point me to an example using multiple objectstores, please?

Kyaw Tun · Accepted Answer · 2014-10-18 15:10:45Z

2

You can do it by opening a transaction of both object stores and using multiple cursors at the same time.

tx = db.transaction(['st1', 'st2'], 'readwrite');
ob1 = tx.objectStore('st1');
ob2 = tx.objectStore('st2');
ob1.openCursor().onsuccess = function(rs1) {
  obj2.openCursor().onsuccess = function(rs2) {
    rs2.result.put(rs1.result.value);
  }
}

answered Oct 18, 2014 at 15:10

Kyaw Tun

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1 Comment

Frank Over a year ago

Thanks for this. I will give it a whirl and get back with result.

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