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<?php |
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namespace Carbon_Fields\Datastore; |
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use Carbon_Fields\Field\Field; |
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/** |
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* Term meta datastore class. |
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*/ |
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class Term_Meta_Datastore extends Meta_Datastore { |
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/** |
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* Initialization tasks. |
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*/ |
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public function init() { |
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global $wpdb; |
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// Setup termmeta table and hooks only once |
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if ( ! empty( $wpdb->termmeta ) ) { |
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return; |
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} |
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$wpdb->termmeta = $wpdb->prefix . 'termmeta'; |
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static::create_table(); |
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// Delete all meta associated with the deleted term |
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add_action( 'delete_term', array( __CLASS__, 'on_delete_term' ), 10, 3 ); |
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} |
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/** |
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* Create term meta database table (for WP < 4.4) |
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*/ |
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public static function create_table() { |
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global $wpdb; |
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$tables = $wpdb->get_results( 'SHOW TABLES LIKE "' . $wpdb->prefix . 'termmeta"' ); |
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if ( ! empty( $tables ) ) { |
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return; |
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} |
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$charset_collate = ''; |
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if ( ! empty( $wpdb->charset ) ) { |
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$charset_collate = 'DEFAULT CHARACTER SET ' . $wpdb->charset; |
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} |
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if ( ! empty( $wpdb->collate ) ) { |
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$charset_collate .= ' COLLATE ' . $wpdb->collate; |
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} |
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$wpdb->query( 'CREATE TABLE ' . $wpdb->prefix . 'termmeta ( |
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meta_id bigint(20) unsigned NOT NULL auto_increment, |
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term_id bigint(20) unsigned NOT NULL default "0", |
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meta_key varchar(255) default NULL, |
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meta_value longtext, |
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PRIMARY KEY (meta_id), |
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KEY term_id (term_id), |
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KEY meta_key (meta_key) |
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) ' . $charset_collate . ';' ); |
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} |
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/** |
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* Delete term meta on term deletion. |
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* Useful for WP < 4.4. |
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* |
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* @param int $term_id Term ID. |
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* @return bool Result of the deletion operation. |
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*/ |
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public static function on_delete_term( $term_id ) { |
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global $wpdb; |
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return $wpdb->query( ' |
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DELETE FROM ' . $wpdb->termmeta . ' |
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WHERE `term_id` = "' . intval( $term_id ) . '" |
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' ); |
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} |
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/** |
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* Retrieve the type of meta data. |
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* |
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* @return string |
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*/ |
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public function get_meta_type() { |
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return 'term'; |
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} |
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/** |
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* Retrieve the meta table name to query. |
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* |
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* @return string |
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*/ |
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public function get_table_name() { |
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global $wpdb; |
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return $wpdb->termmeta; |
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} |
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/** |
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* Retrieve the meta table field name to query by. |
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* |
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* @return string |
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*/ |
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public function get_table_field_name() { |
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return 'term_id'; |
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} |
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} |
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htmlburger /
carbon-fields
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