How to add set featured image button in wp_editor()?

Question

I am working in a plugin and in that plugin adding wordpress default editor(wp_editor)and adding functionality to save post with add media features.

Add media features is working absolutely fine and adding media to respective post, but i want to add image as a thumbnail but i am not able to add set featured image button to the add media button.

This is the code i am writing to add WordPress default editor:

wp_editor( $post_content , 'productinfoeditor', array(
'media_uploads'=>true,
'textarea_name' => 'product_info_content', 
'editor_class' => 'requiredField', 
'teeny' => true, 
'textarea_rows' => 14
) );

In function.php file

add_theme_support( 'post-thumbnails', array('post','page', 'product' ) );

And saving post with:

$post = array();
$post['post_type'] = 'product';
$post['post_content'] = $product_info_content;
$post['post_author'] = $user_ID;
$post['post_status'] = 'publish';
$post['post_title'] = $product_title;
$post_id = wp_insert_post( $post );

Answer 1

Your product post type should have support for thumbnail. See the codex for more info on supports.