Deleting images

User Support
1

Hi,

My form will contain images as attachments and each one will be about 3 to 4 MB in size. I need to be able to download these images either individually or in batches. Downloading them all as a single zip file may quickly create an enormous zip file (e.g.500 images may be over 2GB file).

Is there a way to progressively delete the images after downloading them? I’ve tried deleting the data from the data table but the image attachment seems to remain.

or, is there a way to download in batches based on submission time?

Cheers

James

2

Hi James,

The best way I can think of to selectively download image responses without downloading the entire collection is through the API by specifying the form’s unique ID and then either write a script to parse the output or use a download manager to make downloading files easier.

You can query the API for images for your form this way:

http://kc.kobotoolbox.org/api/v1/media?xform=pk

Find out the unique ID (pk) of your form from here: http://kc.kobotoolbox.org/api/v1/forms?owner=username

For interacting with the API you can use the command line, the HTTP links above (which always show explanations above the API result), or a tool like Postman.

Best,

Tino

···

On Wed, Feb 11, 2015 at 6:15 PM James Webley james...@gmail.com wrote:

Hi,

My form will contain images as attachments and each one will be about 3 to 4 MB in size. I need to be able to download these images either individually or in batches. Downloading them all as a single zip file may quickly create an enormous zip file (e.g.500 images may be over 2GB file).

Is there a way to progressively delete the images after downloading them? I’ve tried deleting the data from the data table but the image attachment seems to remain.

or, is there a way to download in batches based on submission time?

Cheers

James

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