[wp-trac] [WordPress Trac] #18395: Non-URL GUIDs are stripped on post update

[WordPress Trac]

#18395: Non-URL GUIDs are stripped on post update
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 Reporter:  alexkingorg   |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Validation    |    Version:  3.2.1
 Severity:  normal        |   Keywords:
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 The post guid is run through several filters before the post is saved. the
 esc_url_raw() call will end up setting a GUID to an empty string if the
 GUID does not begin with a known/accepted protocol.

 If a plugin/etc. wants to use the GUID column to store an external ID for
 an item brought in from another system (say a Flickr photo ID), then
 updating a post that has the Flickr ID as its GUID through the WP admin
 will end up setting the GUID for that post to ''.

 This would need to be changed if the move was made to UUIDs for GUID
 values as well. Related: #6492.

 A very basic patch for this specific issue is attached, but a larger
 discussion around how this should work is likely needed. Related: #18315

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Ticket URL: <http://core.trac.wordpress.org/ticket/18395>
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