Rails 4 image-path、image-url 和 assets-url 不再在 SCSS 文件中工作 [英] Rails 4 image-path, image-url and asset-url no longer work in SCSS files

问题描述

除了 image-url 和 Rails 4 中的其他内容之外，我们是否应该使用其他内容?它们返回似乎没有意义的不同值.如果我在 /app/assets/images/logo.png 中有 logo.png 并且我执行以下操作，这就是我得到的:

Are we supposed to use something else aside from image-url and others in Rails 4? They return different values that don't seem to make sense. If I have logo.png in /app/assets/images/logo.png and I do the following, this is what I get:

image-url("logo.png") -> url("/images/logo.png") #obviously doesn't work
image-path("logo.png") -> "/images/logo.png"
asset-url("logo.png") -> url("/logo.png")

当然，这些都不起作用，因为它们至少需要前面的 /assets.

Of course none of these work because they need at least /assets in front.

更新:实际上，我刚刚注意到，如何在 Rails 4 中访问图像?我在 /app/assets/images/logo.png 有一张图片.但是，如果我访问以下任何一个 URL，我仍然看不到我的图像:

UPDATE: Actually, I just noticed, how do I access images in Rails 4? I have an image at /app/assets/images/logo.png. But if I go to any of the following URLs, I still don't see my image:

http://localhost:3000/assets/logo.png
http://localhost:3000/assets/images/logo.png
http://localhost:3000/logo.png
http://localhost:3000/images/logo.png

更新 2:我可以调出我的 logo.png 的唯一方法是将其移动到 /app/assets/stylesheets 目录然后拉起来:

UPDATE 2: The only way I can bring up my logo.png is by moving it into the /app/assets/stylesheets directory and then pulling up:

http://localhost:3000/assets/logo.png

推荐答案

我自己也遇到了这个问题.希望有帮助的 3 点:

I just had this issue myself. 3 points that will hopefully help:

• 如果您将图像放在 app/assets/images 目录中，那么您应该能够直接调用图像，路径中没有前缀.IE.image_url('logo.png')
• 取决于您使用资产的位置，取决于方法.如果您将它用作 background-image: 属性，那么您的代码行应该是 background-image: image-url('logo.png').这适用于 less 和 sass 样式表.如果您在视图中内联使用它，那么您将需要使用 rails 中内置的 image_tag 帮助器来输出您的图像.再一次，没有前缀 <%= image_tag 'logo.png' %>
• 最后，如果您正在预编译资产，请运行 rake assets:precompile 以生成资产，或运行 rake assets:precompile RAILS_ENV=production 以进行生产，否则，您的生产环境在加载页面时不会有指纹资产.

• If you place images in your app/assets/images directory, then you should be able to call the image directly with no prefix in the path. ie. image_url('logo.png')
• Depending on where you use the asset will depend on the method. If you are using it as a background-image: property, then your line of code should be background-image: image-url('logo.png'). This works for both less and sass stylesheets. If you are using it inline in the view, then you will need to use the built in image_tag helper in rails to output your image. Once again, no prefixing <%= image_tag 'logo.png' %>
• Lastly, if you are precompiling your assets, run rake assets:precompile to generate your assets, or rake assets:precompile RAILS_ENV=production for production, otherwise, your production environment will not have the fingerprinted assets when loading the page.

此外，对于第 3 点中的那些命令，如果您正在运行 bundler，则需要在它们前面加上 bundle exec.

Also for those commands in point 3 you will need to prefix them with bundle exec if you are running bundler.

这篇关于Rails 4 image-path、image-url 和 assets-url 不再在 SCSS 文件中工作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！