refactor

app/Models/City.php

@@ -27,7 +27,7 @@ class City extends Model
         'geometry',
     ];
 
-    public function province()
+    public function province(): \Illuminate\Database\Eloquent\Relations\BelongsTo
     {
         return $this->belongsTo('App\Models\Province');
     }
@@ -76,7 +76,7 @@ class City extends Model
         return $this->hasMany('App\Models\RoadConstructionRural');
     }
 
-    public function edarateShahri()
+    public function edarateShahri(): \Illuminate\Database\Eloquent\Relations\BelongsToMany
     {
         return $this->belongsToMany('App\Models\EdarateShahri', 'edarate_shahri_be_city')->withPivot('is_primary','id');
     }