WordPress Getting post data for Post Grid of Visual Composer

Solution:1

//** Case Study Title Block Shortcodes ***********
//********************************
add_filter( 'vc_gitem_template_attribute_case_study_title','vc_gitem_template_attribute_case_study_title', 10, 2 );
function vc_gitem_template_attribute_case_study_title( $value, $data ) {
   extract( array_merge( array(
      'post' => null,
      'data' => '',
   ), $data ) );
  $atts_extended = array();
  parse_str( $data, $atts_extended );
  $atts = $atts_extended['atts'];
  // write all your widget code in here using queries etc
  $title = get_the_title($post->ID);
  $link = get_permalink($post->ID);
  $terms = get_the_terms($post->ID, 'case_categories');
  $output = "<h4 class=\"case-title\"><a href=\"". $link ."\">".  get_the_icon($terms[0]->term_id) . $title ."</a></h4>";
  return $output;
}

add_filter( 'vc_grid_item_shortcodes', 'case_study_title_shortcodes' );
function case_study_title_shortcodes( $shortcodes ) {
   $shortcodes['vc_case_study_title'] = array(
     'name' => __( 'Case Study Title', 'sage' ),
     'base' => 'vc_case_study_title',
     'icon' => get_template_directory_uri() . '/assets/images/icon.svg',
     'category' => __( 'Content', 'sage' ),
     'description' => __( 'Displays the case study title with correct icon', 'sage' ),
     'post_type' => Vc_Grid_Item_Editor::postType()
  );
  return $shortcodes;
 }

add_shortcode( 'vc_case_study_title', 'vc_case_study_title_render' );
function vc_case_study_title_render($atts){
   $atts = vc_map_get_attributes( 'vc_case_study_title', $atts );
   return '{{ case_study_title }}';
}

Solution:2

According to Visual Composer documentation: https://kb.wpbakery.com/docs/developers-how-tos/adding-custom-shortcode-to-grid-builder/

When you add the code below to functions.php, a new component will be added in your custom grid builder (in my example the name will be “Author”). There are a number of values you can get by post data template variable function and one of it not the name of the author but their ID (that’s sad but at least you can use this value to get the author name). The value is 'post_author' => ID of the author (for example ‘1’)

Here is the function where I get the post author and display it (if author component was added to your custom grid in “custom grid builder”). Put it in functions.php of your child theme:

add_filter( 'vc_grid_item_shortcodes', 'my_module_add_grid_shortcodes' );
function my_module_add_grid_shortcodes( $shortcodes ) {
    $shortcodes['vc_post_id'] = array(
        'name' => __( 'Author', 'my-text-domain' ),
        'base' => 'vc_post_id',
        'category' => __( 'Content', 'my-text-domain' ),
        'description' => __( 'Show current post author', 'my-text-domain' ),
        'post_type' => Vc_Grid_Item_Editor::postType(),
    );


    return $shortcodes;
}

// output function
add_shortcode( 'vc_post_id', 'vc_post_id_render' );
function vc_post_id_render() {
    $nn = '{{ post_data:post_author }}'; // usage of template variable post_data with argument "post_author"

    return get_the_author($nn);

}

There is a little problem. It works but get_the_author is a deprecated function in WordPress. I’d appreciate any suggestions to make it more modern or if you name other alternatives please suggest.

Also, here is the list of available variables of vc_post_id_render from docs. Here they are:

WP_Post::__set_state(array(
   'ID' => 69,
   'post_author' => '1',
   'post_date' => '2015-04-29 14:15:56',
   'post_date_gmt' => '2015-04-29 14:15:56',
   'post_content' => 'Your post content',
   'post_title' => 'Your post title',
   'post_excerpt' => '',
   'post_status' => 'publish',
   'comment_status' => 'open',
   'ping_status' => 'open',
   'post_password' => '',
   'post_name' => 'post name',
   'to_ping' => '',
   'pinged' => '',
   'post_modified' => '2015-06-17 11:18:41',
   'post_modified_gmt' => '2015-06-17 11:18:41',
   'post_content_filtered' => '',
   'post_parent' => 0,
   'guid' => 'http://wp.master/?p=69',
   'menu_order' => 0,
   'post_type' => 'post',
   'post_mime_type' => '',
   'comment_count' => '0',
   'filter' => 'raw',
   'filter_terms' =>
  array (
  ),
))