diff --git a/app/Http/Resources/AgriculturalBaseResource.php b/app/Http/Resources/AgriculturalBaseResource.php
index ed81589..c95a933 100644
--- a/app/Http/Resources/AgriculturalBaseResource.php
+++ b/app/Http/Resources/AgriculturalBaseResource.php
@@ -30,7 +30,7 @@ class AgriculturalBaseResource extends JsonResource
             'devices' => DeviceResource::collection($this->whenLoaded('devices')),
             'parent_id' => $this->parent_id ?? 0,
             'sort'      => $this->sort ?? 0,
-            'extends'   => json_decode($this->extends ?? []),
+            'extends'   => json_decode($this->extends ?? '') ?? [],
         ];
     }
 }
diff --git a/app/Models/AgriculturalBase.php b/app/Models/AgriculturalBase.php
index 8ed4314..4155031 100644
--- a/app/Models/AgriculturalBase.php
+++ b/app/Models/AgriculturalBase.php
@@ -13,7 +13,6 @@ class AgriculturalBase extends Model
 
     protected $casts = [
         'type' => BaseType::class,
-        // 'extends' => 'array',
     ];
 
     protected $fillable = [