laravel eloquent relation problems belongsToMany 3 Models in pivot table - laravel

Question

I have a case with several models. Order Model, Product Model, Port Model, and Logistic Model.
With an Order belongsTo Many Products, Order Belongs To Port with 'to_port_id' ,Order Belongs To Logistic with 'logistic_id', Product belongs To Port with 'from_port_id',
from_port_id , to_port_id ,logistic_id and unit_price combined with a pivot table .
And now I want to ask. How to retrieve an order with different products with corresponding from_port_id,to_port_id,logistic_id to get different unit_price with the eager load as little sql as possible?
Order Model
+--------------+-------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+----------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| to_port_id | int(11) | NO | | NULL | |
| logistic_id | int(11) | NO | | NULL | |
+--------------+-------------+------+-----+---------+----------------+
Product Model
+--------------+-------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+----------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| from_port_id | int(11) | NO | | NULL | |
+--------------+-------------+------+-----+---------+----------------+
LogisticPort PivotModel
+--------------+-------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------------+-------------+------+-----+---------+----------------+
| from_port_id | int(11) | NO | PRI | NULL | |
| to_port_id | int(11) | NO | PRI | NULL | |
| logistic_id | int(11) | NO | PRI | NULL | |
| unit_price | decimal(11) | NO | | NULL | |
+--------------+-------------+------+-----+---------+----------------+
----------update -------------------------
class Product extends Model
{
protected $table = 'product';
/*
|--------------------------------------------------------------------------
| RELATIONS
|--------------------------------------------------------------------------
*/
public function orderTransact(){
return $this->belongsToMany('App\Models\OrderTransact','order_transact_product','product_id','order_transact_id')->withPivot(['unique_order_product_id','order_quantity_in_log','order_product_status_id ','confirmed_delivery_date','expected_ETD','due_at','downpayment','deposit','total','feedback','created_at','updated_at','tracking_no','weight','logistic_cost'])->using('App\Models\OrderTransactProduct')->as('order_product');
}
public function orderProduct(){
return $this->hasMany('App\Models\OrderTransactProduct','product_id','id');
}
public function fromLogisticPort(){
return $this->belongsTo('App\Models\LogisticPort','from_port_id','id');
}
}
class LogisticPort extends Model
{
use HasFactory;
protected $table = 'logistic_port';
public function logisticFrom(){
return $this->belongsToMany('App\Models\Logistic','logistic_port_logistic','from_port_id','logistic_id')->withPivot(['to_port_id','courier_charges_unit'])->using('App\Models\LogisticPortLogistic');
}
public function logisticTo()
{
return $this->belongsToMany('App\Models\Logistic','logistic_port_logistic','to_port_id','logistic_id')->withPivot(['from_port_id','courier_charges_unit'])->using('App\Models\LogisticPortLogistic');
}
public function logisticPortFrom(){
return $this->belongsToMany('App\Models\LogisticPort','logistic_port_logistic','to_port_id','from_port_id')->withPivot(['logistic_id','courier_charges_unit'])->using('App\Models\LogisticPortLogistic');
}
public function logisticPortTo(){
return $this->belongsToMany('App\Models\LogisticPort','logistic_port_logistic','from_port_id','to_port_id')->withPivot(['logistic_id','courier_charges_unit'])->using('App\Models\LogisticPortLogistic');
}
public function toPivotLogisticPort(){
return $this->hasMany('App\Models\LogisticPortLogistic','to_port_id','id');
}
public function product(){
return $this->hasMany('App\Models\Product','from_port_id','id');
}
public function orderTransact(){
return $this->hasMany('App\Models\OrderTransact','from_port_id','id');
}
}
class Logistic extends Model
{
protected $table = 'logistic';
public function orderTransact(){
return $this->hasMany('App\Models\OrderTransact','order_transact_id','id');
}
public function logisticPortFrom(){
return $this->belongsToMany('App\Models\LogisticPort','logistic_port_logistic','logistic_id','from_port_id')->withPivot(['to_port_id','courier_charges_unit'])->using('App\Models\LogisticPortLogistic');
}
public function logisticPortTo(){
return $this->belongsToMany('App\Models\LogisticPort','logistic_port_logistic','logistic_id','to_port_id')->withPivot(['from_port_id','courier_charges_unit'])->using('App\Models\LogisticPortLogistic');
}
}
class OrderTransact extends Model
{
use HasFactory;
use SoftDeletes;
protected $table = 'order_transact';
/*
|--------------------------------------------------------------------------
| RELATIONS
|--------------------------------------------------------------------------
*/
public function logistic(){
return $this->belongsTo('App\Models\Logistic','logistic_id','id');
}
public function product(){
return $this->belongsToMany('App\Models\Product','order_transact_product','order_transact_id','product_id')->withPivot(['unique_order_product_id','order_quantity_in_log','order_product_status_id','confirmed_delivery_date','expected_ETD','due_at','downpayment','deposit','total','feedback','created_at','updated_at','tracking_no','weight','logistic_cost'])->using('App\Models\OrderTransactProduct')->as('order_product');
}
public function orderProduct(){
return $this->hasMany('App\Models\OrderTransactProduct','order_transact_id','id');
}
public function toLogisticPort(){
return $this->belongsTo('App\Models\LogisticPort','to_port_id','id');
}
}