Per File Meta-info in Async Mode with AutoUpload

3 posts, 0 answers
  1. François
    François avatar
    14 posts
    Member since:
    Jul 2014

    Posted 09 Sep 2014 Link to this post

    Hi Guys
    When the user drags a bunch of files into the upload widget, the files are being stored on the server and a logical file incl. a file version is being created
    in the database backend assigning a unique ID to each uploaded file. I modified the widged in a way that the user can meanwhile edit some meta informations
    like the name, the responsible person, whether a pdf view shall be generated and so on. This happens simultaneously while uploading on a "per file base". When all files are uploaded completely a button becomes active to commit all meta information. The problem is, that at this point (when the commit button is pressed after uploading all files), I need to know, which local "row" has which FileID on the server.

    I didn't think this would be a problem in the first place as I realized, that a separate "upload" event and corresponding "save" request is being performed for each file (even when selecting multiple files at once). So I thought, I simply send the uid to the server by evt.data = {uid: file.uid) and the "save" handler on the server side returns a tuple (uid, FileID) which I can catch in the success event and assign the fileID to the matching DOM element containing the appropriate uid data attribute. What I didn't realize was, that it seems to be impossible to know for which file a "upload" event is being fired, so I don't know which uid to select as I always get the entire array of selected files.

    Am I missing something here?

    Best regards
  2. François
    François avatar
    14 posts
    Member since:
    Jul 2014

    Posted 09 Sep 2014 in reply to François Link to this post

    I just realized that "upload" that the files array size in each call of "upload" is only one and contains the very specific file (incl. the uid) for which this event was called. So association of uid to fileid is possible. But what about if the browser is not able to call separate requests for each file and the system falls back to batching? I suppose then I get only a single call to "upload" and the array contains the whole bunch of selected files? Any idea how I could do this association in such a case?
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  4. Dimiter Madjarov
    Admin
    Dimiter Madjarov avatar
    2156 posts

    Posted 10 Sep 2014 Link to this post

    Hello Francois,


    Thanks for the detailed explanation. I don't think that the fallback will be necessary, as in basically every Kendo UI supported browser, the files will be uploaded in separate requests, when the async.batch option is set to false e.g. IE 7+, Chrome, Firefox 4+. In the case when the async.batch option is enabled, all files selected at once, will be placed in a single list item and will share a common uid, so the current approach won't be applicable.

    Regards,
    Dimiter Madjarov
    Telerik
     
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