If your Rails version is between > 3.1.0 and < 4, place your fonts in any of the these folders: app/assets/fonts lib/assets/fonts vendor/assets/fonts For Rails versions > 4, you must place your fonts in the app/assets/fonts folder. Note: To place fonts outside of these designated folders, use the following configuration: config.assets.precompile << /\.(?:svg|eot|woff|ttf)\z/ For Rails versions > 4.2, it is recommended to add this configuration to config/initializers/assets.rb. However, you can also add it to either config/application.rb , or to config/production.rb Declare your font in your CSS file: @font-face { font-family: 'Icomoon'; src:url('icomoon.eot'); src:url('icomoon.eot?#iefix') format('embedded-opentype'), url('icomoon.svg#icomoon') format('svg'), url('icomoon.woff') format('woff'), url('icomoon.ttf') format('truetype'); font-weight: normal; font-style: normal; } Make sure your font is named exactly the same as in the URL portion of the declaration. Capital letters and punctuation marks matter. In this case, the font should have the name icomoon. If you are using Sass or Less with Rails > 3.1.0 (your CSS file has .scss or .less extension), then change the url(...) in the font declaration to font-url(...). Otherwise, your CSS file should have the extension .css.erb, and the font declaration should be url('<%= asset_path(...) %>'). If you are using Rails > 3.2.1, you can use font_path(...) instead of asset_path(...). This helper does exactly the same thing but it's more clear. Finally, use your font in your CSS like you declared it in the font-family part. If it was declared capitalized, you can use it like this: font-family: 'Icomoon';

If your Rails version is between > 3.1.0 and < 4, place your fonts in any of the these folders: app/assets/fonts lib/assets/fonts vendor/assets/fonts For Rails versions > 4, you must place your fonts in the app/assets/fonts folder. Note: To place fonts outside of these designated folders, use the following configuration: config.assets.precompile << /\.(?:svg|eot|woff|ttf)\z/ For Rails versions > 4.2, it is recommended to add this configuration to config/initializers/assets.rb. However, you can also add it to either config/application.rb , or to config/production.rb Declare your font in your CSS file: @font-face { font-family: 'Icomoon'; src:url('icomoon.eot'); src:url('icomoon.eot?#iefix') format('embedded-opentype'), url('icomoon.svg#icomoon') format('svg'), url('icomoon.woff') format('woff'), url('icomoon.ttf') format('truetype'); font-weight: normal; font-style: normal; } Make sure your font is named exactly the same as in the URL portion of the declaration. Capital letters and punctuation marks matter. In this case, the font should have the name icomoon. If you are using Sass or Less with Rails > 3.1.0 (your CSS file has .scss or .less extension), then change the url(...) in the font declaration to font-url(...). Otherwise, your CSS file should have the extension .css.erb, and the font declaration should be url('<%= asset_path(...) %>'). If you are using Rails > 3.2.1, you can use font_path(...) instead of asset_path(...). This helper does exactly the same thing but it's more clear. Finally, use your font in your CSS like you declared it in the font-family part. If it was declared capitalized, you can use it like this: font-family: 'Icomoon';

把你的字体文件(woff, woff2, eot, ttf，…)放在/app/assets/fonts目录下。

然后添加以下到您的配置/初始化/资产。rb:

Rails.application.config.assets.paths << Rails.root.join('app', 'assets', 'fonts')
Rails.application.config.assets.precompile << /\.(?:svg|eot|woff|woff2|ttf)\z/

在上面的答案中，woff2没有包括在内(为了将来的参考，你可能需要添加其他扩展，只需在这里添加|{font-file-extension})

使用css文件中的字体:

重要的是，你需要将它从stylesheet.css重命名为stylesheet.css.scss(这是为了让font-url在资产预编译后正确地在生产中转换字体的url):

@font-face {
  font-family: 'MyFont'
  src: font-url('myfont.woff') format('woff');
}

body{
  font-family: 'MyFont'
}

然后运行:

rails assets:precompile

在运行资产预编译后，你的字体文件从app/assets/fonts/myfont复制。woff到public/assets/myfont-{SOME_DIGEST_KEY}。woff的位置。现在上面的css在生产中也很像图像资产。

您还可以看到，在预编译资产命令之后创建了一个应用程序-{somedigest}.css，在其中您将看到 现在，我们的font-url('myfont.woff')将被转换为url(/assets/myfont.woff-{SOME_DIGEST_KEY}.woff)，并且摘要与文件移动到的位置匹配。通过这种方式，更新你的字体文件也可以适当地破坏浏览器缓存等。

确保你的nginx也服务于public/assets文件夹以获得更好的性能。这是用rails 5和rails 6在生产中测试的。它也应该工作与rails 4最有可能。

如果你有一个叫做scaffold。css的文件。Scss，那么就有可能覆盖您在其他文件中所做的所有自定义操作。我把那个文件注释掉了，突然之间一切都正常了。如果那个文件里没有什么重要的东西，你还不如把它删掉!

我使用Rails 4.2，并不能得到footable图标显示。显示的是小方框，而不是我所期望的折叠行上的(+)和小排序箭头。在学习了这里的信息之后，我对代码做了一个简单的更改:删除css中的字体目录。也就是说，像这样更改所有的css条目:

src:url('fonts/footable.eot');

看起来像这样:

src:url('footable.eot');

它工作。我认为Rails 4.2已经假定了字体目录，所以在css代码中再次指定它会使字体文件找不到。希望这能有所帮助。

我最近将Rails 3应用程序升级到Rails 4时也遇到了类似的问题。我的字体在Rails 4+中不能正常工作，我们只允许将字体保存在app/assets/fonts目录下。但是我的Rails 3应用程序有一个不同的字体组织。所以我必须配置应用程序，使它仍然与Rails 4+有我的字体在不同的地方，而不是app/assets/fonts。我已经尝试了几个解决方案，但在我发现非愚蠢的消化资产宝石后，它只是让它变得如此简单。

通过在Gemfile中添加以下代码行来添加这个gem:

gem 'non-stupid-digest-assets'

然后运行:

bundle install

最后在config/initializers/non_digest_assets中添加以下一行。rb文件:

NonStupidDigestAssets.whitelist = [ /\.(?:svg|eot|woff|ttf)$/ ]

就是这样。这很好地解决了我的问题。希望这对遇到类似问题的人有所帮助。