返回附件大小

app/Http/Resources/API/FileByObjectResource.php

@@ -18,7 +18,7 @@ class FileByObjectResource extends JsonResource
             'id' => $this->id,
             'title' => $this->title,
             'extension' => $this->extension,
-            'size' => $this->extension,
+            'size' => $this->size,
             'created_by' => new UserProfileResource($this->createdBy),
             'created_at' => (string)$this->created_at,
             'version' => $this->version,