how to many to many relationship query in laravel - laravel

Question

Brief:
I use laravel 5.6
I have a problem in many to many relation queries.
I have 2 model: Order and Cart
Code:
Cart Model:
class Cart extends Model
{
public function order()
{
return $this->belongsToMany(Order::class);
}
}
Order model :
class Order extends Model
{
public function carts(){
return $this->belongsToMany(Cart::class);
}
}
Cart Migration :
public function up()
{
Schema::create('carts', function (Blueprint $table) {
$table->increments('id');
$table->integer('user_id')->nullable();
$table->integer('price')->nullable();
$table->integer('pass')->default(0);
});
}
Question:
How to get orders that their pass field are in Cart = 1 in?
Thanks!

Answer 1

First, since your Cart has many orders, the relationship should be named "orders" with an s.
You showed only you Cart migration so I cannot guess, but Laravel also expects you to create a "cart-order" pivot table.
If I understood well, you can do what you want like this:
Order::whereHas('carts', function ($query) {
$query->where('pass', 1);
})->get();
You can read more about Eloquent's Many to Many relationships in the Laravel documentation, here.

Answer 2

Try Like this,
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Comment extends Model
{
/**
* Get all of the owning commentable models.
*/
public function commentable()
{
return $this->morphTo();
}
}
class Post extends Model
{
/**
* Get all of the post's comments.
*/
public function comments()
{
return $this->morphMany('App\Comment', 'commentable');
}
}
class Video extends Model
{
/**
* Get all of the video's comments.
*/
public function comments()
{
return $this->morphMany('App\Comment', 'commentable');
}
}
//Access like this in your controller
$post = App\Post::find(1);
foreach ($post->comments as $comment) {
//
}
This Link Help you,
https://laravel.com/docs/5.7/eloquent-relationships#polymorphic-relations in that case. Hope this will help you.