[wp-trac] [WordPress Trac] #30117: Possible regression in taxonomy.php sanitize_query

[WordPress Trac]

#30117: Possible regression in taxonomy.php sanitize_query
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 Reporter:  tmtrademark   |       Owner:  boonebgorges
     Type:  defect (bug)  |      Status:  accepted
 Priority:  normal        |   Milestone:  4.1
Component:  Taxonomy      |     Version:  trunk
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Changes (by boonebgorges):

 * owner:   => boonebgorges
 * status:  new => accepted
 * milestone:  Awaiting Review => 4.1


Comment:

 tmtrademark and I have worked through this at WCSF contributor day. Turns
 out there is a regression where `WP_Tax_Query::sanitize_queries()` returns
 a bum result if one of the items passed in the `$tax_query` array is an
 empty string - it was passing the `is_first_order_clause()` check, because
 `empty( $clause )` was returning true.

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Ticket URL: <https://core.trac.wordpress.org/ticket/30117#comment:1>
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