Alter is not changing quantity in session

edited May 2019 in Developers
When I run:

      $alter = array();
      $data = array(
        'session_id' => $checkfront_session,
        'alter' => $alter
      return $this->instance->post('booking/session', $data);

The correct item is removed from the session, but when I change $alter[1]='remove' to $alter[1]=2, the quantity is not updating.  Can someone please help?


  • Hello kg567,

    Thank you for using our forums!

    I will look into have our API documents updated, but the 'alter' parameter is a bit outdated. I believe it still works for 'simple' items, but because items can now have multiple parameters, we cannot just indicate a single value for a line item to change its quantity.

    Instead, you should make a new rated query for the item, using the new parameter values. This will give you a new slip for the item with the new quantity. You can then replace the old slip on the booking session using:

    POST /booking/session?session_id={session_id}&line_id={line_id}&slip={new_slip}

    I am sorry for any confusion this caused, and please let me know if you have any more questions!

    All the best,

    Technical Support Analyst
    Checkfront | | Email:

  • Ok, thanks for the update!
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