Ruby-on-rails 在公共文件夹中显示静态图像（rails 4）
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Display static image in public folder (rails 4)
提问by Timothy Leung
I have some images in the public folder, I obtain the url /public/link/to/image.jpgin my controller. I want to display it in my view, so I passed the url to the view.
我在公共文件夹中有一些图像，我/public/link/to/image.jpg在控制器中获取了 url 。我想在我的视图中显示它，所以我将 url 传递给视图。
But how can I display it on the webpage?
但是我怎样才能在网页上显示它呢？
I searched through the post, most of them related to photos stored in assets folder,
whichi can be retrieved by <%= image_tag image-url (filename) %>in view.
我翻了翻帖子，大部分都和assets文件夹里的照片有关，可以<%= image_tag image-url (filename) %>在view中检索。
So how could I display image in public folder in view?
那么如何在视图中显示公共文件夹中的图像？
回答by Jonathan Bowman
I just tested this out in one of my applications, adding an image to the public folder, and was able to render it in view by using:
我刚刚在我的一个应用程序中对此进行了测试，将图像添加到公共文件夹中，并且能够使用以下方法将其呈现在视图中：
<img src="/your_image_file_name.png">
<img src="/your_image_file_name.png">
I've never done it through the public folder before, but if I had to guess I'd say you don't need the "/public" part of the file path.
我以前从未通过公共文件夹完成过，但如果我不得不猜测，我会说您不需要文件路径的“/public”部分。
If I understand the question, that should do it - hope to have helped.
如果我理解这个问题，那就应该这样做 - 希望有所帮助。
回答by Andrius
You can also use Rails-way via <%= image_tag("/path/to/file.jpg") %>
您还可以通过使用 Rails-way <%= image_tag("/path/to/file.jpg") %>
For security reasons, image_tagcan only look inside /public, so you don't have to specify /publicin the path — it will get added automatically.
出于安全原因，image_tag只能查看 inside /public，因此您不必/public在路径中指定- 它会自动添加。
Remark- try always to store images in subfolders in /publicas it (image_tag) will not work if you omit /publicand simply pass the image filename to image_tag, like <%= image_tag("filename.jpg") %> <- in this case it will go search /assets/imagesfolder.
备注- 尝试始终将图像存储在子文件夹中，/public因为如果省略/public并简单地将图像文件名传递给它 (image_tag) 将不起作用image_tag，例如 <%= image_tag("filename.jpg") %> <- 在这种情况下它会去搜索/assets/images文件夹。
Solution in action:
行动中的解决方案：
回答by Gediminas
You can use:
您可以使用：
<%= image_tag('/link/to/image.jpg') %>
if your image is in publicdir, and link/to/ subdirs
如果您的图像在public目录中，并且链接/到/子目录
If it is in root public folder:
如果它在根公用文件夹中：
<%= image_tag('/image.jpg') %>
