Operation processes on invoices

app/Models/CostUnit.php

@@ -29,13 +29,13 @@ class CostUnit extends InstancedModel
         'archived',
     ];
 
-    public function tresurers()  : BelongsToMany{
+    public function treasurers()  : BelongsToMany{
         return $this->belongsToMany(User::class, 'cost_unit_treasurers', 'cost_unit_id', 'user_id')
             ->withTimestamps();
     }
 
     public function resetTreasurers() {
-        $this->tresurers()->detach();
+        $this->treasurers()->detach();
         $this->save();
     }
 

app/Models/Invoice.php

@@ -3,6 +3,7 @@
 namespace App\Models;
 
 use App\Enumerations\InvoiceStatus;
+use App\Enumerations\InvoiceType;
 use App\Scopes\InstancedModel;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
@@ -75,4 +76,8 @@ class Invoice extends InstancedModel
     public function status() : BelongsTo {
         return $this->belongsTo(InvoiceStatus::class, 'status')->first();
     }
+
+    public function invoiceType() : InvoiceType {
+        return $this->belongsTo(InvoiceType::class, 'type', 'slug')->first();
+    }
 }