Limit number of tickets per transaction

[dd32]

Sometimes there's a need to limit the number of tickets per transaction.

It would be ideal if Camptix allowed for a "maximum tickets per transaction" option per ticket / reservation / coupon / event.
This may not prevent someone purchasing multiple tickets in multiple transactions, but would be useful in certain circumstances.

This could be very useful for Speaker tickets / coupons, where a generic coupon/reservation is shared with speakers, with the intention of them claiming one-per-speaker, but seeing they can claim multiple leads to additional plus ones.

Other events may be special, and intended on every attendee having a singular ticket (Community Summit for example).

This came up on Slack today:
https://wordpress.slack.com/archives/C08M59V3P/p1724266664412339

It turns out we have some code to do this, to limit it to 1 per transaction for specific sites:

wordcamp.org/public_html/wp-content/mu-plugins/camptix-tweaks/camptix-tweaks.php

Lines 997 to 1015 in dfe9fe7

	/**
	* Restrict the max number of tickets per order to one for specific site(s).
	*
	* @param int $max Default ticket maximum.
	* @return int Maybe updated max ticket amount.
	*/
	function limit_one_ticket_per_order( $max ) {
	$limited_sites = array(
	1056, // testing.wordcamp.org/2019.
	1415, // communitysummit.wordcamp.org/2023.
	);
	$current_site_id = get_current_blog_id();
	if ( in_array( $current_site_id, $limited_sites, true ) ) {
	return 1;
	}
	return $max;
	}

See also; #740 and #1305

[lumicliment]

+1
I fully support the addition of this option. In our event we have encountered this problem, and although thanks to @dd32 we have solved it with CSS, it is not an elegant or easy option for non-programmers.

[pkevan]

just scanning the code, I imagine there is edge cases to consider (such as the camptix_max_tickets_per_order_after_coupon_bypass filter), but does seems like a good idea - presumably it's only ever been a filter in code due to these complexities in the code.

[nilovelez]

It would be interesting to add this as a per-ticket-type option.

For example allow the 10 usual tickets for regular tickets, but only 1 for microsponsors