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update_field() with field type User

  • Hi,

    I need help with a current project, which deals with having to add new users to the CPT using the field type Users when new user purchases a product.

    I was hoping I could do it through functions.php.

  • Get the value of the field without formatting and supply the post ID of the post that you want to update. Get Field:; Update Field:

    // $post_id is the ID of the post you want to update
    // 3rd arg == false tells ACF not to format the value
    // $users will == an array or user IDs
    $users = get_field('user_field_name', $post_id, false);
    // add the users ID to the array
    $users[] = $new_user_id_to_add;
    // update the field
    // $selector == the field key of the field to update
    update_field($selector, $users, $post_id);
  • This is what I currently have.

    elseif ($product_id == 1126) {
    $e_post = get_page_by_title( $title );
    $epost_id = $e_post->ID;
    $member = wp_get_current_user();
    $newmember = $member->ID;
    update_field( ‘comp_members’, $newmember, $epost_id);
    echo “New Member, $newmember , added to $title.”;

    } // End of new member


    // ...................
      } elseif ($product_id == 1126) {
        $e_post = get_page_by_title( $title );
        $epost_id = $e_post->ID;
        $member = wp_get_current_user();
        $newmember = $member->ID;
        $members = get_field('comp_members', $epost_id, false);
        if (!is_array($members)) {
          $members = array();
        $members[] = $newmember;
        update_field( 'comp_members', $newmember, $epost_id);
        echo "New Member, $newmember , added to $title.";
    } // End of new member
  • Hi John,

    I was actually able to fix this issue already. The error came from the line:

    WRONG line : $e_post = get_page_by_title( $title );
    CORRECT line : $e_post = get_page_by_title($title, OBJECT, ‘company’);

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