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update_metadata_by_mid() and delete_metadata_by_mid(). Props kovshenin. see #18195 

git-svn-id: https://develop.svn.wordpress.org/trunk@18494 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Ryan Boren 2011-08-01 17:01:54 +00:00
parent 14b7842a79
commit 0ac95fd5a6
1 changed files with 135 additions and 0 deletions
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135
wp-includes/meta.php
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@ -321,6 +321,141 @@ function get_metadata_by_mid( $meta_type, $meta_id ) {
return $meta;
}
/**
* Update meta data by meta ID
*
* @since 3.3.0
*
* @uses get_metadata_by_mid() Calls get_metadata_by_mid() to fetch the meta key, value
* and object_id of the given meta_id.
*
* @param string $meta_type Type of object metadata is for (e.g., comment, post, or user)
* @param int $meta_id ID for a specific meta row
* @param string $meta_value Metadata value
* @param string $meta_key Optional, you can provide a meta key to update it
* @return bool True on successful update, false on failure.
*/
function update_metadata_by_mid( $meta_type, $meta_id, $meta_value, $meta_key = false ) {
global $wpdb;
// Make sure everything is valid.
if ( ! $meta_type )
return false;
if ( ! $meta_id = absint( $meta_id ) )
return false;
if ( ! $table = _get_meta_table( $meta_type ) )
return false;
$column = esc_sql($meta_type . '_id');
$id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
// Fetch the meta and go on if it's found.
if ( $meta = get_metadata_by_mid( $meta_type, $meta_id ) ) {
$original_key = $meta->meta_key;
$original_value = $meta->meta_value;
$object_id = $meta->{$column};
// If a new meta_key (last parameter) was specified, change the meta key,
// otherwise use the original key in the update statement.
if ( false === $meta_key ) {
$meta_key = $original_key;
} elseif ( ! is_string( $meta_key ) ) {
return false;
}
// Sanitize the meta
$_meta_value = $meta_value;
$meta_value = sanitize_meta( $meta_key, $meta_value, $meta_type );
$meta_value = maybe_serialize( $meta_value );
// Format the data query arguments.
$data = array(
'meta_key' => $meta_key,
'meta_value' => $meta_value
);
// Format the where query arguments.
$where = array();
$where[$id_column] = $meta_id;
do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
// Run the update query, all fields in $data are %s, $where is a %d.
$result = (bool) $wpdb->update( $table, $data, $where, '%s', '%d' );
// Clear the caches.
wp_cache_delete($object_id, $meta_type . '_meta');
// Users cache stores usermeta that must be cleared.
if ( 'user' == $meta_type )
clean_user_cache($object_id);
do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
return $result;
}
// And if the meta was not found.
return false;
}
/**
* Delete meta data by meta ID
*
* @since 3.3.0
*
* @uses get_metadata_by_mid() Calls get_metadata_by_mid() to fetch the meta key, value
* and object_id of the given meta_id.
*
* @param string $meta_type Type of object metadata is for (e.g., comment, post, or user)
* @param int $meta_id ID for a specific meta row
* @return bool True on successful delete, false on failure.
*/
function delete_metadata_by_mid( $meta_type, $meta_id ) {
global $wpdb;
// Make sure everything is valid.
if ( ! $meta_type )
return false;
if ( ! $meta_id = absint( $meta_id ) )
return false;
if ( ! $table = _get_meta_table( $meta_type ) )
return false;
// object and id columns
$column = esc_sql($meta_type . '_id');
$id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
// Fetch the meta and go on if it's found.
if ( $meta = get_metadata_by_mid( $meta_type, $meta_id ) ) {
$object_id = $meta->{$column};
do_action( "delete_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value );
// Run the query, will return true if deleted, false otherwise
$result = (bool) $wpdb->query( $wpdb->prepare( "DELETE FROM $table WHERE $id_column = %d LIMIT 1;", $meta_id ) );
// Clear the caches.
wp_cache_delete($object_id, $meta_type . '_meta');
// Users cache stores usermeta that must be cleared.
if ( 'user' == $meta_type )
clean_user_cache($object_id);
do_action( "deleted_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value );
return $result;
}
// Meta id was not found.
return false;
}
/**
* Update the metadata cache for the specified objects.
*