Re: [Tracker] How to get newly added audio files?

[simon hong <simon hong81 gmail com>]

2011/4/14 Adrien Bustany <abustany gnome org>

Le Thu, 14 Apr 2011 10:37:27 +0200,
Philip Van Hoof <philip codeminded be> a éit :

> On Thu, 2011-04-14 at 17:19 +0900, simon hong wrote:
>
> There are two arrays, inserted and deleted. The inserted triples are
> in inserted and the deleted triples are in deleted.
>
> An overwrite means that there's one in inserted and one in deleted
> (one complete graphupdated signal is transactional).

So in that usecase you'd probably have to filter on the
tracker:available predicate in the GraphUpdated signal...

I can get only mounted files by filtering (tracker:available) :) thank you.

Now, I cannot fetch only newly added files based on tracker:modifled.

When I insert usb stick again without any copy or delete files in usb stick, tracker:modified value is increased.

So,  I think tracker:added value is more suitable for my purpose.

File's tracker:added value is not changed  during insert and remove many times.

To get latest tracker:added value, I used following query.

SELECT MAX (?t) WHERE { ?u a nmm:MusicPiece; tracker:added ?t }

The result is string formatted xsd:dateTime.

I want to convert above result to another format like timezone.

So, I made following query to convert xsd:dateTime, But tracker-sparql returns (null)...

SELECT fn:timezone-from-dateTime (?t) WHERE { ?u a nmm:MusicPiece; tracker:added ?t }

How can I convert dateTime?

Any advice will be appreciate.

Thank you.

Simon.

 

>
> > When I insert and remove usb stick, GraphUpdated signals from
> > tracker-store is delivered.
> > How can I differentiate insert from remove ?
>
>