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Créer un identifiant alphanumérique unique sur wp_insert_post

J'ai besoin d'un identifiant alphanumérique aléatoire (et unique) pour les permaliens et pour la relation de post entre une installation multisite. Mon idée est de générer cet ID sur wp_insert_post et de l'enregistrer en tant que valeur de champ personnalisé dans _alphanumeric_id.

J'ai déjà essayé de comprendre cela par moi-même mais j'ai eu une erreur 500:

function generateAlphanumericID( $length = 11, $post_id ) {

    $characters = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ-_~'!,";
    $charactersLength = strlen($characters);
    $randomString = '';
    for ($i = 0; $i < $length; $i++) {
        $randomString .= $characters[Rand(0, $charactersLength - 1)];
    }
    /**
     * Now check here if the string is in the database
     * I am using two custom functions is_AlphanumericID_available() and save_AlphanumericID_into_db()
     */
    if( is_AlphanumericID_available( $randomString ) ){
        save_AlphanumericID_into_db( $randomString, $post_id );
        return $randomString;
    } else {
        return generateAlphanumericID();
    }
}
add_action('wp_insert_post','generateAlphanumericID'10, 3);



// function to grab all possible meta values of the chosen meta key.
function get_meta_values( $meta_key,  $post_type = 'post' ) {

    $posts = get_posts(
        array(
            'post_type' => $post_type,
            'meta_key' => $meta_key,
            'posts_per_page' => -1,
        )
    );

    $meta_values = array();
    foreach( $posts as $post ) {
        $meta_values[] = get_post_meta( $post->ID, $meta_key, true );
    }

    return $meta_values;

}

// function to check if the randomString is available
function is_AlphanumericID_available( $randomString ) {

    $arrayString = get_meta_values( '_alphanumeric_id', 'article' );


    if (in_array( $randomString, $arrayString)) {
      return false; // "Match found"
    }  else {
      return true;  // "Match not found"
    }


}



// function to save the randomString as custom field value
function save_AlphanumericID_into_db( $randomString, $post_id ) {

    add_post_meta($post_id, '_alphanumeric_id', $randomString);
}
add_action('wp_insert_post', 'save_AlphanumericID_into_db', 10, 3);

Mise à jour du 05.Okt.2017:

function save_AlphanumericID_into_db( $post_id ) {

    $randomString = 'Y-7Gd789ovW';


    // check if the randomString is available
    $posts = get_posts( array( 
        'post_type' => 'article',
        'meta_key' => '_alphanumeric_id', 
        'posts_per_page' => -1,
        )
    );  

    $meta_values = array();
    foreach( $posts as $post ) {
        $meta_values[] = get_post_meta( $post->ID, $meta_key, true );
    }

    if (in_array( $randomString, $arrayString)) {
        // "Match found"
         add_post_meta($post_id, '_alphanumeric_id', 'error');

    }  else {
        // "Match not found"
        add_post_meta($post_id, '_alphanumeric_id', $randomString);
    }





}
add_action('wp_insert_post', 'save_AlphanumericID_into_db', 10, 3);

Cela fonctionne (en tant que fonction unique) sans erreur, mais la vérification de la base de données ne fonctionne pas - je n’ai aucune "erreur" ajoutée si la clé existe déjà. - Toute idée pourquoi

permalinksmultisiteid
1
Game Unity

Voir ici la version de travail

// function to save the randomString as custom field value
function generate_AlphanumericID( $post_id ) {

    $postTypes = array('profile', 'article');
    $postType = get_post_type( $post_id );

    if (in_array( $postType, $postTypes ) ) {


        $characters = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ-_~'!,";

        $charactersLength = strlen($characters);
        $randomString = '';
        for ($i = 0; $i < 11; $i++) {
            $randomString .= $characters[Rand(0, $charactersLength - 1)];
        }

         /**
         * Now check here if the string is in the database
         */
        $args = array(
        'post_type'     =>  array(
                $postTypes 
            ),
        'meta_query'    =>  array(
            array(
                'meta_key'  =>  '_alphanumeric_id'
            )
        )
        );
        $posts = new WP_Query( $args );


        $meta_values = '';
        if( $posts->have_posts() ) {
          while( $posts->have_posts() ) {
            $posts->the_post();

            $meta_values[] = get_post_meta( get_the_ID(), '_alphanumeric_id', true );
          }
        } 
        wp_reset_postdata();


        if (in_array( $randomString, $meta_values )) {
            // "Match found"
            return generate_AlphanumericID;

        }  else {
            // "Match not found"
            add_post_meta($post_id, '_alphanumeric_id', $randomString);
            return $randomString;
        }

    }

}
add_action('draft_to_publish', 'generate_AlphanumericID', 10, 3);

Remarque:

Pour utiliser cette clé comme balise permalien, je vous recommande ceci https://github.com/athlan/wordpress-custom-fields-permalink-plugin

1
Game Unity