Eloquent hasMany with hasMany and a join in the middle - eloquent

Question

I have this database structure
orders ====► order_items ====► order_item_meta
║ |
║ |
▼ ▼
order_meta products
The relations are orders hasMany order_items which hasManyThrough order_item_meta, orders also hasMany order_meta.
In addition, the order_items/product_id needs to be joined with the products table.
I have the order_id and I am trying to get the whole data in one call. But I have a weird issue. This is the current code:
$orders = Orders::
with([
'order_items' => function($q) { //#1
$q->leftJoin('products','order_items.product_id', '=', 'products.id');
}
])
->with(['order_items.orderitem_meta']) //#2
->with(['order_meta']); //#3
It seems that with#1 and with#2 are interfering with each other.
Case1: If I do with#1+with#3, I am able to see in the result the data from the product table + the data from order_items, but not the data from order_item_meta.
Case2: If I do with#2+with#3, I am able to see in the result the data from the from order_items + data from order_item_meta, but not from the product table.
In both cases data from with#3 is ok.
But if I do all three together (with#1+with#2+with3) I get the same results as case1. data from order_item_meta is missing.
Orders.php
class Orders extends Model
{
public function order_items()
{
return $this->hasMany('App\OrderItem','order_id','id'); //'foreign_key', 'local_key'
}
public function order_meta()
{
return $this->hasMany('App\OrderMeta','order_id','id'); //'foreign_key', 'local_key'
}
public function orderitem_meta()
{
return $this->hasManyThrough(
'App\OrderItem',
'App\OrderItemMeta',
'order_item_id', // Foreign key on order_itemmeta table...
'order_id', // Foreign key on order_item table...
'id', // Local key on order_item table...
'id' // Local key on order_itemmeta table...
);
}
}
OrderItem.php
class OrderItem extends Model
{
public function order()
{
return $this->belongsTo('App\Orders');
}
public function orderitem_meta()
{
return $this->hasMany('App\OrderItemMeta','order_item_id','id'); //'foreign_key', 'local_key'
}
}
OrderItemMeta.php
class OrderItemMeta extends Model
{
protected $table = 'order_itemmeta';
public function orderitem()
{
return $this->belongsTo('App\OrderItem');
}
}
What is the correct way to do this query?

Answer 1

I solved it by adding a relationship between the order_items and the products:
in OrderItem.php
public function product()
{
return $this->hasOne('App\Products','id','product_id'); //'foreign_key', 'local_key'
}
then the query becomes this:
$orders = Orders::
with(['order_items.orderitem_meta','order_items.product','order_meta']);
and it works