[wp-trac] [WordPress Trac] #21989: update_option() calls sanitize_option() twice when option does not exist

[WordPress Trac]

#21989: update_option() calls sanitize_option() twice when option does not exist
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 Reporter:  MikeSchinkel                         |       Owner:  (none)
     Type:  defect (bug)                         |      Status:  new
 Priority:  normal                               |   Milestone:  Future
                                                 |  Release
Component:  Options, Meta APIs                   |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  dev-feedback has-patch needs-        |     Focuses:
  testing needs-refresh                          |
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Comment (by littler.chicken):

 I'll add that I've run into this recently as well. I've got a settings
 page with a group of repeatable fields. The last one of the group is
 hidden so that it can be cloned, and during sanitization, the last (empty)
 field is discarded. On the initial save, since the process is run twice,
 the next to last field is erroneously discarded.

 I'm avoiding the issue for the moment by preemptively adding the option to
 the database if it does not already exist when the settings page is built,
 but this is less than ideal.

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Ticket URL: <https://core.trac.wordpress.org/ticket/21989#comment:24>
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