Multiple Laravel Eloquent Relationship - laravel-5

Question

I got stacked in laravel eloquent relationships. Here's the scenario:
I have 4 tables in my database:
Categories,
Courses,
Lessons, and
Lesson_items.
I have 3 more tables:
category_course,
course_lesson, and
lesson_item_lesson.
Now, I have these codes:
Category.php - model
class Category extends Model
{
public function courses(){
return $this->belongsToMany('App\Course');
}
}
routes.php - routes
Route::get('/category/{id}', [
'uses' => 'LearnController#getCategories'
]);
MyController.php - controller
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;
use App\Category;
use App\Lesson;
class LearnController extends Controller
{
public function getCategories($id){
$categories = Category::find($id);
$lessons = Lesson::find($categories);
return view('categories', compact('categories', 'lessons'));
}
}
Now, The result that I want is this:
Really need your help guys.

Answer 1

You need nested eager laoding
Category.php
class Category extends Model
{
public function courses(){
return $this->belongsToMany('App\Course');
}
}
Course.php
class Course extends Model
{
public function lessons(){
return $this->belongsToMany('App\Lesson');
}
}
Lesson.php
class Lesson extends Model
{
public function lessonItems(){
return $this->belongsToMany('App\LessonItem');
}
}
LessonItem.php
class LessonItem extends Model
{
public function lessons(){
return $this->belongsToMany('App\Lesson');
}
}
Then in controller
class LearnController extends Controller
{
public function getCategories($id){
$categories = Category::with('courses.lessons.lessonItems')->find($id);
return view('categories', compact('categories'));
}
}
Edit
You need some kind of this construction
#foreach ($category->courses as $course) {
#foreach ($course->lessons as $lesson) {
#foreach ($lesson->lessonItems as $item) {
#endforeach
#endforeach
#endforeach