Prior to the introduction of `WP_Term_Query`, the 'orderby' clause
passed to the 'terms_clauses' filter was prefixed by `ORDER BY`. After
`WP_Term_Query`, this was not the case; `ORDER BY` was added after the
filter. As such, plugins filtering 'terms_clauses' and returning an
'orderby' clause beginning with `ORDER BY` resulted in invalid syntax
when `WP_Term_Query` prepended a second `ORDER BY` keyword to
the clause.
This changeset rearranges the way the 'orderby' clause is built so that
it will be passed to 'terms_clauses' in the previous format.
Fixes#37378.
git-svn-id: https://develop.svn.wordpress.org/trunk@38099 602fd350-edb4-49c9-b593-d223f7449a82
In order to allow meta-related values of `orderby` to be handled properly,
the term query's `meta_query` object must run its `get_sql()` method before
`orderby` parsing.
Fixing this bug required addressing another bug in `WP_Meta_Query`, which
caused the table alias index not to be reset when calling `get_sql()`
multiple times on the same object.
Props littler.chicken.
Fixes#37151.
git-svn-id: https://develop.svn.wordpress.org/trunk@37860 602fd350-edb4-49c9-b593-d223f7449a82
Allows the fetching of terms based on `term_taxonomy_id`, or an array of
`term_taxonomy_ids`.
Props spacedmonkey.
Fixes#37074.
git-svn-id: https://develop.svn.wordpress.org/trunk@37683 602fd350-edb4-49c9-b593-d223f7449a82
`WP_Term_Query` is modeled on existing query classes, such as those used
for comments and users. It provides a more consistent structure for generating
term queries, and should make it easier to add new functionality in the future.
Props flixos90, boonebgorges.
See #35381.
git-svn-id: https://develop.svn.wordpress.org/trunk@37572 602fd350-edb4-49c9-b593-d223f7449a82
