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Introduce register_meta(), get_metadata_by_mid(), and *_post_meta capabilities. fixes #17850

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git-svn-id: https://develop.svn.wordpress.org/trunk@18445 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Ryan Boren
2011-07-20 22:04:35 +00:00
parent 14853ed87e
commit 6b5d8397b0
8 changed files with 118 additions and 45 deletions
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wp-includes/meta.php
+74 -8
View File
@@ -26,7 +26,7 @@
* @param bool $unique Optional, default is false. Whether the specified metadata key should be
* unique for the object. If true, and the object already has a value for the specified
* metadata key, no change will be made
* @return bool True on successful update, false on failure.
* @return bool The meta ID on successful update, false on failure.
*/
function add_metadata($meta_type, $object_id, $meta_key, $meta_value, $unique = false) {
if ( !$meta_type || !$meta_key )
@@ -49,7 +49,7 @@ function add_metadata($meta_type, $object_id, $meta_key, $meta_value, $unique =
$check = apply_filters( "add_{$meta_type}_metadata", null, $object_id, $meta_key, $meta_value, $unique );
if ( null !== $check )
return (bool) $check;
return $check;
if ( $unique && $wpdb->get_var( $wpdb->prepare(
"SELECT COUNT(*) FROM $table WHERE meta_key = %s AND $column = %d",
@@ -61,20 +61,25 @@ function add_metadata($meta_type, $object_id, $meta_key, $meta_value, $unique =
do_action( "add_{$meta_type}_meta", $object_id, $meta_key, $_meta_value );
$wpdb->insert( $table, array(
$result = $wpdb->insert( $table, array(
$column => $object_id,
'meta_key' => $meta_key,
'meta_value' => $meta_value
) );
if ( ! $result )
return false;
$mid = (int) $wpdb->insert_id;
wp_cache_delete($object_id, $meta_type . '_meta');
// users cache stores usermeta that must be cleared.
if ( 'user' == $meta_type )
clean_user_cache($object_id);
do_action( "added_{$meta_type}_meta", $wpdb->insert_id, $object_id, $meta_key, $_meta_value );
do_action( "added_{$meta_type}_meta", $mid, $object_id, $meta_key, $_meta_value );
return true;
return $mid;
}
/**
@@ -146,6 +151,7 @@ function update_metadata($meta_type, $object_id, $meta_key, $meta_value, $prev_v
do_action( "update_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value );
$wpdb->update( $table, $data, $where );
wp_cache_delete($object_id, $meta_type . '_meta');
// users cache stores usermeta that must be cleared.
if ( 'user' == $meta_type )
@@ -281,6 +287,40 @@ function get_metadata($meta_type, $object_id, $meta_key = '', $single = false) {
return array();
}
/**
* Get meta data by meta ID
*
* @since 3.3.0
*
* @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 object Meta object or false.
*/
function get_metadata_by_mid( $meta_type, $meta_id ) {
global $wpdb;
if ( ! $meta_type )
return false;
if ( !$meta_id = absint( $meta_id ) )
return false;
if ( ! $table = _get_meta_table($meta_type) )
return false;
$id_column = ( 'user' == $meta_type ) ? 'umeta_id' : 'meta_id';
$meta = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $table WHERE $id_column = %d", $meta_id ) );
if ( empty( $meta ) )
return false;
if ( isset( $meta->meta_value ) )
$meta->meta_value = maybe_unserialize( $meta->meta_value );
return $meta;
}
/**
* Update the metadata cache for the specified objects.
*
@@ -588,7 +628,7 @@ function _get_meta_table($type) {
* @return bool True if the key is protected, false otherwise.
*/
function is_protected_meta( $meta_key, $meta_type = null ) {
$protected = ( '_' == $meta_key[0] );
$protected = ( '_' == $meta_key[0] );
return apply_filters( 'is_protected_meta', $protected, $meta_key, $meta_type );
}
@@ -603,8 +643,34 @@ function is_protected_meta( $meta_key, $meta_type = null ) {
* @param string $meta_type Type of meta
* @return mixed Sanitized $meta_value
*/
function sanitize_meta( $meta_key, $meta_value, $meta_type = null ) {
return apply_filters( 'sanitize_meta', $meta_value, $meta_key, $meta_type );
function sanitize_meta( $meta_key, $meta_value, $meta_type ) {
return apply_filters( "sanitize_{$meta_type}_meta_{$meta_key}", $meta_value, $meta_key, $meta_type );
}
/**
* Register meta key
*
* @since 3.3.0
*
* @param string $meta_type Type of meta
* @param string $meta_key Meta key
* @param string|array $sanitize_callback A function or method to call when sanitizing the value of $meta_key.
* @param string|array $auth_callback Optional. A function or method to call when performing edit_post_meta, add_post_meta, and delete_post_meta capability checks.
* @param array $args Arguments
*/
function register_meta( $meta_type, $meta_key, $sanitize_callback, $auth_callback = null ) {
if ( is_callable( $sanitize_callback ) )
add_filter( "sanitize_{$meta_type}_meta_{$meta_key}", $sanitize_callback, 10, 3 );
if ( empty( $auth_callback ) ) {
if ( is_protected_meta( $meta_key, $meta_type ) )
$auth_callback = '__return_false';
else
$auth_callback = '__return_true';
}
if ( is_callable( $auth_callback ) )
add_filter( "auth_{$meta_type}_meta_{$meta_key}", $auth_callback, 10, 6 );
}
?>