laravel-medailibrary getFirstMediaUrl("images") not work for joined tables - laravel

Question

I have a problem getting media from a joined table in laravel-medailibrary, I used getFirstMediaUrl("images") to get photos from one table and it works, but if I join two or three tables it not work, how can I solve it?
I want to get photos from those posts that shared by a user.
this post table:
this is share_tb table:
this is users table:
this is the media table:

Answer 1

I find my answer after trying some ways:
public function getPosts(Request $request)
{
$result = [];
$postID = DB::table("share_tb")->where("user_id", Auth::user()->id)->get();
foreach ($postID as $id) {
if (count(Post::where("id", $id->related_id)->get()) > 0) {
$posts = Post::where("id", $id->related_id)->get();
foreach ($posts as $post) {
// $result = $post->getMedia('images');
array_push($result, [
"comment_count" => getTotalComment($post->id),
"course_id" => $post->course_id,
"id" => $post->id,
'post_image' => count($post->getMedia('images')) > 0 ? $post->getMedia('images')[0]->getFullUrl('big') : "",
'logo'=>GetCourseLogo::collection(Course::where('course_id',$post->course_id)->get()),
"post_author" => $post->post_author,
"post_date" => $post->post_date,
"post_excerpt" => $post->post_excerpt,
"post_modified" => $post->post_modified,
"post_parent" => $post->post_parent,
"post_title" => $post->post_title,
"post_type" => $post->post_type,
]);
}
}
}
return Response()->json($result);
}
and by this resource collection, I get the logo:
class GetCourseLogo extends JsonResource
{
public function toArray($request)
{
return $this->getFirstMediaUrl('logo');
}
}