create many to many polymorphic relation

app/Models/RoadItemsProject.php

@@ -4,6 +4,7 @@ namespace App\Models;
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Relations\HasOne;
+use Illuminate\Database\Eloquent\Relations\MorphToMany;
 use Illuminate\Http\UploadedFile;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
@@ -167,17 +168,18 @@ class RoadItemsProject extends Model
         }
     }
 
-    public function cmmsMachines(): BelongsToMany
+    public function cmmsMachines(): MorphToMany
     {
-        return $this->belongsToMany(CMMSMachine::class,
+        return $this->morphToMany(CMMSMachine::class,
+            'machinable',
             'cmms_machine_road_items_project',
             'road_items_project_id',
             'machine_id'
         );
     }
 
-    public function rahdaran(): BelongsToMany
+    public function rahdaran(): MorphToMany
     {
-        return $this->belongsToMany(Rahdaran::class,'rahdaran_road_items_project');
+        return $this->morphToMany(Rahdaran::class, 'rahdarable', 'rahdaran_road_items_project');
     }
 }