Ruby on Rails对图像的真实路径视而不见

Question

我将照片上传到/app/assets/images/products/。我上传它们时效果很好。

File.open(Rails.root.join(upload_images_path,image.original_filename)

，其中

def upload_images_path
    "app/assets/images/products/"
end

def image_full_url
   upload_images_path << image_file_name
end

但是，在页面上有一个代码

 =image_tag @product.image_full_url

它给出了

<img src="/assets/app/assets/images/products/my-file.png" alt="my-file">

为什么Rails将assets附加到图像src？如何避免呢？