Titanium Community Questions & Answer Archive

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mobile database backup/recovery on device

Anyone have working code to backup the local database on a device (specifically iPhone, but portability would be nice). I've tried several methods, but I can't get any of the .dump or .backup commands from sqlite to work.

The end result is an application that gets updates OTA and can revert to a previous version of the data if something goes wrong.



— asked July 6th 2010 by Eric Lofland
  • backup
  • database

2 Answers

  • Accepted Answer


    Try closing the db & then use the Ti.Filesystem to create the backup, by reading the existing file and writing it out to the backup.

    You should then be able to open the DB again.

    — answered July 6th 2010 by David Ashwood
    • A couple of questions here, where does the file get copied, resourcesDirectory?

      I see methods for Ti.Filesystem.File read and write, but I have no idea how to implement these. Do you have or can you point me to any examples?


      — commented July 6th 2010 by Eric Lofland
    • The KitchenSink is always a good place to start http://github.com/appcelerator/titanium_mobile/blob/master/demos/KitchenSink/Resources/examples/filesystem.js - look around line 41 for how to read/write a file.

      — commented July 6th 2010 by David Ashwood
    • var f = Titanium.Filesystem.getFile(Titanium.Filesystem.resourcesDirectory, 'app.db');
      var b = Titanium.FileSystem.createFile(Titanium.Filesystem.applicationDataDirectory, 'backup.db');
      var resources =f.read().text;

      This fails with
      [ERROR] Script Error = Result of expression 'Titanium.FileSystem' [undefined] is not an object. at misc.js (line 63).

      — commented July 6th 2010 by Eric Lofland
    • sheesh, how many times will I mistype Filesystem (I put FileSystem)… This is the code I just tested that works:

      var f = Titanium.Filesystem.getFile(Titanium.Filesystem.resourcesDirectory, 'app.db');
      var backupDir = Titanium.Filesystem.getFile(Titanium.Filesystem.applicationDataDirectory);
      var b = Titanium.Filesystem.getFile(backupDir.nativePath, 'backup.db');

      I've been looking at a very old Kitchen Sink version and didn't have all this code. Time to update!

      Thank you so much for your help David!


      — commented July 6th 2010 by Eric Lofland
  • db.execute('.backup dbBackup.db');
    Error Domain=com.plausiblelabs.pldatabase Code=3 UserInfo=0x560d6a0 
    "An error occured parsing the provided SQL statement." 
    (SQLite #1: near ".": syntax error) (query: '.backup dbBackup.db')
    — answered July 6th 2010 by Eric Lofland
    • Any success with this? I am looking to create backups and be able to restore them as well. Would love to see if anyone has gotten some working code before I fully dive in creating my own.


      — commented September 18th 2011 by Leonardo Amigoni
    • Hi Leonardo, did you figure this out?
      I would like to save a generated user db from Android to my webserver and restore if necessary.

      — commented December 14th 2012 by Jeff Lukin
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