如何在不同页面上显示相同图像的样式

Question

在我的Rails应用程序中，我有一些默认的gravatar图像，但我需要它在两页中的大小不同。 说，在第一页图像高度应该是50px，并在2nb页面 - 100px。

问题是：我应该如何设置自己的代码以避免重复方法并实现我的目标？ P.S.我相信我应该在“gravatar_show”中为“图片标签”添加一些更改，但是我所有的尝试都失败了。

def gravatar_for(user) # it's for 1'st page 
    gravatar_id = Digest::MD5::hexdigest(user.email.downcase) 
    gravatar_url = "https://secure.gravatar.com/avatar/#{gravatar_id}" 
    image_tag(gravatar_url, alt: user.name, class: "gravatar img-rounded") 
end 

def gravatar_show(user) # it's for 2'nd page(show) 
    gravatar_for user 
    ........# missing code...... 
end 

======================================

当然，我可以复制和更改类和每一个在CSS中使用不同的类，但它看起来丑陋

def gravatar_for(user) 
    gravatar_id = Digest::MD5::hexdigest(user.email.downcase) 
    gravatar_url = "https://secure.gravatar.com/avatar/#{gravatar_id}" 
    image_tag(gravatar_url, alt: user.name, class: "gravatar img-rounded") 
end 

def gravatar_show(user) 
    gravatar_id = Digest::MD5::hexdigest(user.email.downcase) 
    gravatar_url = "https://secure.gravatar.com/avatar/#{gravatar_id}" 
    image_tag(gravatar_url, alt: user.name, class: "gravatar-show img-rounded") 
end 

Answer 1

使用延迟String评价"#{variable}"：

def gravatar_for(user, show = nil) 
    gravatar_id = Digest::MD5::hexdigest(user.email.downcase) 
    gravatar_url = "https://secure.gravatar.com/avatar/#{gravatar_id}" 
    mod = "-show" if show 
    image_tag(gravatar_url, alt: user.name, class: "gravatar#{mod} img-rounded") 
end