[wp-meta] [Making WordPress.org] #4390: Hide duplicates on WordCamp attendees page

[Making WordPress.org]

#4390: Hide duplicates on WordCamp attendees page
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 Reporter:  hlashbrooke              |      Owner:  (none)
     Type:  enhancement              |     Status:  new
 Priority:  normal                   |  Milestone:
Component:  WordCamp Site & Plugins  |   Keywords:  needs-patch
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 If someone buys a WordCamp ticket and then also registers for Contributor
 Day using a ticket (which is how many WordCamps manage things), then by
 default they appear twice on the Attendees page. Example of this on the
 WCEU 2019 page here: https://2019.europe.wordcamp.org/attendees/

 We should hide duplicates from appearing on that page. The simplest
 solution would be to hide them based on their email address, but it might
 be more robust to match on multiple criteria (name, surname and email
 address together).

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Ticket URL: <https://meta.trac.wordpress.org/ticket/4390>
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