How to make a field unique

• collin_038

• February 27, 2020 at 8:29 pm

So I’m working on a custom post type to work together with Advanced custom fields. And I want duplicate emails to get blocked by saying something like mail already used

function init_members() {
    $labels = array(
        'name'               => 'Members',
        'singular_name'      => 'Member',
        'menu_name'          => 'Members',
        'name_admin_bar'     => 'Member',
        'add_new'            => 'New member',
        'add_new_item'       => 'New member',
        'new_item'           => 'New member',
        'edit_item'          => 'Edit member',
        'all_items'          => 'All members',
        'search_items'       => 'Search member',
        'not_found'          => 'No members found',
        'not_found_in_trash' => 'No members found in trash'
    );

    $args = array(
        'labels' => $labels,
        'public' => true,
        'exclude_from_search' => true,
        'rewrite' => array('slug' => 'member'),
        'has_archive' => false,
        'supports' => array('title'),
        'show_in_rest' => true,
        'menu_icon' => 'dashicons-groups'

    );
    register_post_type('members', $args);
}
add_action('init', 'init_members');

function add_member_columns ( $columns ) {
    unset($columns['date']);
    return array_merge ( $columns, array (
        'contactperson'   => __ ( 'Contactperson' ),
        'phone_number'   => __ ( 'Phonenumber' ),
        'email'   => __ ( 'Email' ),
    ) );
}
add_filter ('manage_members_posts_columns', 'add_member_columns' );

function fill_member_columns ( $column, $post_id ) {
    switch ( $column ) {
        case 'contactperson':
            echo get_post_meta ( $post_id, 'contactperson', true );
            break;
        case 'phone_number':
            echo get_post_meta ( $post_id, 'phone_number', true );
            break;
        case 'email':
            echo get_post_meta ( $post_id, 'email', true );
            break;
    }
}
add_action ('manage_members_posts_custom_column', 'fill_member_columns', 10, 2 );

I tried a solution I’ve seen of John Huebner but since I’m not really sure what I’m doing I didn’t manage to implement it properly.

if someone could send it so it would work properly with my code above that would be amazing 😀

• collin_038

• February 27, 2020 at 11:14 pm

So I don’t need help anymore I got it fixed

by adding:

'posts_per_page' => -1,
to this

$args = array(
        'post_type' => $post_type,
        'post_status' => 'publish, draft, trash',
        'post__not_in' => array($post_id),
        'posts_per_page' => -1,
        'meta_query' => array(
            array(
                'key' => 'email',
                'value' => $value
            )
        )
    );
    $query = new WP_Query($args);

• collin_038

• February 27, 2020 at 11:14 pm

So I don’t need help anymore I got it fixed

by adding:

'posts_per_page' => -1,
to this

$args = array(
        'post_type' => $post_type,
        'post_status' => 'publish, draft, trash',
        'post__not_in' => array($post_id),
        'posts_per_page' => -1,
        'meta_query' => array(
            array(
                'key' => 'email',
                'value' => $value
            )
        )
    );
    $query = new WP_Query($args);