親カテゴリー「おやおや」とその子カテゴリー「こどもも」があるとします。WordPressでは子カテゴリー「こどもも」にチェックを入れた場合、親カテゴリー「おやおや」にはチェックが入りません。これを親カテゴリーにも自動的にチェックを入れるプラグイン(Parent Category Toggler)はあるのですが、これを過去分にさかのぼってチェックを入れるには？
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| INSERT INTO wp_term_relationships | |
| SELECT object_id, term_taxonomy_id, 0 AS term_order | |
| FROM ( | |
| SELECT DISTINCT r.object_id, p.term_taxonomy_id | |
| FROM wp_term_relationships AS r | |
| INNER JOIN wp_term_taxonomy AS t ON r.term_taxonomy_id = t.term_taxonomy_id | |
| INNER JOIN wp_term_taxonomy AS p ON t.parent = p.term_id | |
| WHERE t.taxonomy = 'category' | |
| AND t.parent > 0 ) AS a | |
| WHERE NOT EXISTS | |
| (SELECT 'x' | |
| FROM wp_term_relationships AS b | |
| WHERE a.object_id = b.object_id | |
| AND a.term_taxonomy_id = b.term_taxonomy_id) | |
| ; |
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