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铁路纸张照相图,使用图象
原标题:Rails Paperclip image URL using Image ID?

我 m再 st。 而此时此刻,也许会因为我使用一种工具,而没有设计这种工具。

我正在用纸张来拍摄图像,而我把这些图像作为称为模型的事例,你对此表示怀疑。 图像属于用户。 用户有许多图像。

然而,我要具体指明用户图像的全貌是它们的缺省形象。 因此,我大脑告诉我,我需要在用户桌上增加一个领域,以掌握我想要的图像。

图像的使用可追溯到文档中。 我不想让用户拥有自己的附属档案,我只想用户模式能够参考一个有其可用蒸汽助手方法的图像的具体实例。

问题在于我试图利用该身份证为这一形象获得URL。 无论我试图做什么,都不可能使用纸张,或者我没有正确的组织。

基本上,我希望能够利用用户模式的事例来查阅这一形象。 因此:

<%= image_tag @user.image.url %>

But this doesn t work. I get why it doesn t work, but I don t understand how to make

@user.image

这是一种mag性纸.片,其所附方法可检索ur。

基本上,如果我知道如何利用图象(ID i d)获得纸面图像。 任何杂质?

最佳回答

我相信你能够从图像物体中获取纸面图像URL?

如果是,在用户模式中添加:

def image_url
  Image.find( self.image ).url
end

如果现在的用户模型“image”一栏和图像模型“url”一栏中图像的外观能够保存缺省图像,那么你就应当能够做到:

@user.image_url

这应当归还你的“虚弱”形象的ur。

问题回答

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