I'm a rails newbie, I've been trying to figure out what is going on with the stylesheets_link_tag on heroku.
我是一个铁杆新手，我一直试图弄清楚heroku上的stylesheets_link_tag是怎么回事。
If I use
如果我使用
= stylesheet_link_tag "style", :cache => true
heroku uses "all.css" and does not pick up the stylesheet, but if I use
heroku使用“all.css”并且没有拿起样式表，但是如果我使用的话
= stylesheet_link_tag "style", :cache => false
it serves the stylesheet using its name "style.css". Why?
它使用名称“style.css”为样式表提供服务。为什么？
3 个解决方案
#1
17
This is the result of calling :cache => true on your stylesheet link tag.
这是在样式表链接标记上调用：cache => true的结果。
:cache => true takes all of the stylesheets provided and concatenates them into one file called all.css.
：cache => true获取所有提供的样式表，并将它们连接到一个名为all.css的文件中。
The reason you're only seeing this on your Heroku deployment is because it calls the concatenated all.css only when the Rails application is running in production mode.
你只在Heroku部署中看到这个的原因是因为只有当Rails应用程序在生产模式下运行时它才会调用连接的all.css。
So for example let's say I have three stylesheets and I include them in my header:
例如，假设我有三个样式表，并将它们包含在我的标题中：
= stylesheet_link_tag "application", "jquery-ui", "style", :cache => true
When in development, this will include application.css, jquery-ui.css, and style.css (in that order).
在开发中，这将包括application.css，jquery-ui.css和style.css（按此顺序）。
In production, it will concatenate all of the CSS from the three files (in the order provided) into one single file called "all.css", which will be the only CSS file included.
在生产中，它会将三个文件中的所有CSS（按提供的顺序）连接成一个名为“all.css”的文件，这个文件将是唯一包含的CSS文件。
The benefit is making fewer HTTP requests in production and ideally a smaller file size for your included CSS, which should hopefully speed up page load.
这样做的好处是可以减少生产中的HTTP请求，理想情况下，包含CSS的文件大小更小，这有望加快页面加载速度。
Edit As Casper points out in the comments, Heroku has a read-only filesystem. You might want to look at Heroku Asset Packager for a Heroku-specific solution.
编辑正如Casper在评论中指出的那样，Heroku有一个只读文件系统。您可能希望查看Heroku Asset Packager以获取Heroku特定的解决方案。
#2
1
Tested this and it did not work for me (adding config.serve_static_assets = true to production.rb)
测试了这个，它对我不起作用（将config.serve_static_assets = true添加到production.rb）
#3
0
Setting :cache => true causes my requests to fail outright.
设置：cache => true会导致我的请求彻底失败。
My solution for the short term is to add the following to my config/environments/prodcution.rb
我的短期解决方案是将以下内容添加到我的config / environments / prodcution.rb中
config.serve_static_assets = true
I'm slightly less worried about the performance being behind Cloudflare. Finding a way to serve my css and js files concatenated is on my to-do list.
我对Cloudflare背后的表现稍微不那么担心。找到一种方法来连接我的css和js文件是在我的待办事项列表中。
#1
17
This is the result of calling :cache => true on your stylesheet link tag.
这是在样式表链接标记上调用：cache => true的结果。
:cache => true takes all of the stylesheets provided and concatenates them into one file called all.css.
：cache => true获取所有提供的样式表，并将它们连接到一个名为all.css的文件中。
The reason you're only seeing this on your Heroku deployment is because it calls the concatenated all.css only when the Rails application is running in production mode.
你只在Heroku部署中看到这个的原因是因为只有当Rails应用程序在生产模式下运行时它才会调用连接的all.css。
So for example let's say I have three stylesheets and I include them in my header:
例如，假设我有三个样式表，并将它们包含在我的标题中：
= stylesheet_link_tag "application", "jquery-ui", "style", :cache => true
When in development, this will include application.css, jquery-ui.css, and style.css (in that order).
在开发中，这将包括application.css，jquery-ui.css和style.css（按此顺序）。
In production, it will concatenate all of the CSS from the three files (in the order provided) into one single file called "all.css", which will be the only CSS file included.
在生产中，它会将三个文件中的所有CSS（按提供的顺序）连接成一个名为“all.css”的文件，这个文件将是唯一包含的CSS文件。
The benefit is making fewer HTTP requests in production and ideally a smaller file size for your included CSS, which should hopefully speed up page load.
这样做的好处是可以减少生产中的HTTP请求，理想情况下，包含CSS的文件大小更小，这有望加快页面加载速度。
Edit As Casper points out in the comments, Heroku has a read-only filesystem. You might want to look at Heroku Asset Packager for a Heroku-specific solution.
编辑正如Casper在评论中指出的那样，Heroku有一个只读文件系统。您可能希望查看Heroku Asset Packager以获取Heroku特定的解决方案。
#2
1
Tested this and it did not work for me (adding config.serve_static_assets = true to production.rb)
测试了这个，它对我不起作用（将config.serve_static_assets = true添加到production.rb）
#3
0
Setting :cache => true causes my requests to fail outright.
设置：cache => true会导致我的请求彻底失败。
My solution for the short term is to add the following to my config/environments/prodcution.rb
我的短期解决方案是将以下内容添加到我的config / environments / prodcution.rb中
config.serve_static_assets = true
I'm slightly less worried about the performance being behind Cloudflare. Finding a way to serve my css and js files concatenated is on my to-do list.
我对Cloudflare背后的表现稍微不那么担心。找到一种方法来连接我的css和js文件是在我的待办事项列表中。