Mysql Usersshow中的NameError

显示/home/bdme551/bdme21/app/views/users/show.html.erb，其中第6行出现：

undefined local variable or method `size' for #<#<Class:0x007fb271759100>:0x00000003b579a0>
Extracted source (around line #5):

      def gravatar_for(user, options = { size: 80 })
        gravatar_id = Digest::MD5::hexdigest(user.email.downcase)
        gravatar_url = "https://secure.gravatar.com/avatar/#{gravatar_id}?s=#{size}"
        image_tag(gravatar_url, alt: user.name, class: "gravatar")
      end
    end

我的名字有误。有人能帮我吗？谢谢。

您应该使用to options[：size]调用size，因为您正在传递options参数的哈希值

而不是：

gravatar_url = "https://secure.gravatar.com/avatar/#{gravatar_id}?s=#{size}"

尝试：

---

我在下面补充了答案。

gravatar_url = "https://secure.gravatar.com/avatar/#{gravatar_id}?s=#{options[:size]}"