fix:change models problems and routes

app/Models/Airport.php

@@ -14,10 +14,11 @@ use Illuminate\Database\Eloquent\Model;
  * 
  * @property int $id
  * @property string $name
- * @property string $city
+ * @property int|null $city_id
  * @property string $code
  * @property string $country
  * 
+ * @property City|null $city
  * @property Collection|Flight[] $flights
  *
  * @package App\Models
@@ -28,13 +29,22 @@ class Airport extends Model
 	public $timestamps = false;
 	public static $snakeAttributes = false;
 
+	protected $casts = [
+		'city_id' => 'int'
+	];
+
 	protected $fillable = [
 		'name',
-		'city',
+		'city_id',
 		'code',
 		'country'
 	];
 
+	public function city()
+	{
+		return $this->belongsTo(City::class);
+	}
+
 	public function flights()
 	{
 		return $this->hasMany(Flight::class, 'departure_airport_id');

app/Models/Flight.php

@@ -12,7 +12,7 @@ use Illuminate\Database\Eloquent\Model;
 
 /**
  * Class Flight
- * 
+ *
  * @property int $id
  * @property int $arrival_aiport_id
  * @property int $departure_airport_id
@@ -27,7 +27,7 @@ use Illuminate\Database\Eloquent\Model;
  * @property int $status
  * @property Carbon $created_at
  * @property Carbon $updated_at
- * 
+ *
  * @property Airline $airline
  * @property File $file
  * @property Airport $airport
@@ -72,16 +72,21 @@ class Flight extends Model
 	{
 		return $this->belongsTo(Airline::class);
 	}
+    public function departureAirport()
+    {
+        return $this->belongsTo(Airport::class, 'departure_airport_id');
+    }
+
+    public function arrivalAirport()
+    {
+        return $this->belongsTo(Airport::class, 'arrival_aiport_id');
+    }
 
 	public function file()
 	{
 		return $this->belongsTo(File::class);
 	}
 
-	public function airport()
-	{
-		return $this->belongsTo(Airport::class, 'departure_airport_id');
-	}
 
 	public function bookings()
 	{