When an empty string is passed as one of the clauses in the `$tax_query`
parameter, it should be discarded rather than parsed as a first-order clause.
Props tmtrademark.
Fixes#30117.
git-svn-id: https://develop.svn.wordpress.org/trunk@30031 602fd350-edb4-49c9-b593-d223f7449a82
This was leftover code from the previous implementation, which used a `foreach()`
loop. See [29901].
Props nofearinc.
See #29738, #29718.
git-svn-id: https://develop.svn.wordpress.org/trunk@29931 602fd350-edb4-49c9-b593-d223f7449a82
IN clauses that are connected by OR require only a single table join. To avoid
extraneous joins, keep track of generated table aliases, and let sibling
clauses piggy-back on those aliases when possible.
Introduces WP_Tax_Query::sanitize_relation() to reduce some repeated code.
Adds unit tests to verify the JOIN consolidation, and integration tests for
cases where JOINS are being combined.
Props boonebgorges, otto42, jakub.tyrcha.
Fixes#18105.
git-svn-id: https://develop.svn.wordpress.org/trunk@29902 602fd350-edb4-49c9-b593-d223f7449a82
* Exhaustive tests for publicly available functionality of WP_Tax_Query.
* For tests that are related to the tax_query argument as used in WP_Query, move to tests/post/query.php.
* Add some tax_query tests to cover single vs multiple queries using AND and OR; various values for 'field'; various values for 'operator'.
* Improve test names.
* Correct @group annotations.
* Improve performance of some WP_Query-related tests by declaring 'update_post_meta/term_cache' false.
Fixes#29718
git-svn-id: https://develop.svn.wordpress.org/trunk@29805 602fd350-edb4-49c9-b593-d223f7449a82
