• Laravel-mongodb Version: ^3.8
• PHP Version: 8.0
• Database Driver & Version: mongodb driver - 3.6

Description:

I'm trying to implement belongsTo relationship with custom local key and foreign key.

Collection structure

posts

• _id
• accountId

alerts

• _id
• postId
• type

Expected behaviour

Here we will match accountId in posts collection and postId in alerts collection.

App\Models\Post

public function alert(){
 return $this->belongsTo(App\Models\Alert::class,'postId','accountId');
 }

Actual behaviour

When I dd App\Models\Alert::first()->alert , it returns null.