Rail应用程序中的静态图像资产不会在Heroku制作中显示 [英] Static image assets in rails app not displaying on Heroku production

问题描述

我试图在部署之前使用以下命令预编译我的映像：

$ RAILS_ENV =生产bin / rake资产：预编译 $ b

我在开发中使用的模板中使用 image_tag 。

更新： config.serve_static_files 在dev中被称为默认为true，但在生产中被关闭，因为资产应该是通过您的网络服务器提供。我现在只是在heroku上使用免费套餐，并且仍在运行webrick，所以我将此设置为true，但没有运气。

更新2：当我设置 config.serve_static_files 到 false ，heroku没有看到我的任何资产，我的所有样式都消失了，图像仍然不明显。虽然heroku确实发送了一条警告消息，表示所有的 config.serve_static_files 都能够启用公用文件夹中的所有内容，并与资产管道无关。我想这与资产管道无关，因为它只是提供公用文件夹中的资产，并没有查看我们的资产目录。我还看到，heroku在部署时运行预编译命令，所以我不需要每次都这样做。

这让我想知道使用 image_tag 调用我的资产的方式可能是问题所在，但我我不知道为什么会这样？

更新3：资产管道的导轨指南说：在常规视图中，您可以访问public / assets / images目录中的图像像这样：<％= image_tagrails.png％> 。我使用这个约定调用我的图像，如<％ = image_tag（lab49，size：80x30）％> ，但图片仍然不会出现。更新4：看到我的答案。

解决方案

如果您来到这篇文章，并且您正在使用Heroku，Heroku只会在您使用

这是可行的：

 < ％= image_taglab49.png，size：80x30％> 
  

这不起作用（尽管它会在本地）：

 <％= image_taglab49，size： 80x30％> 
  

I tried pre-compiling my images before deployment using the command:

$ RAILS_ENV=production bin/rake assets:precompile

I am using image_tag's in my templates that work in development.

Update: config.serve_static_files is said to default to true in dev, but then is turned off in production because the assets should be provided via your web server. I currently am just using the free tier on heroku and am still running webrick, so I have this set to true, but no luck.

Update 2: When I set config.serve_static_files to false, heroku does not see any of my assets, all my stylings go away and images remain unfound. Although heroku does send a warning message upon pushing to master saying that all "config.serve_static_files does is enables serving everything in the public folder and is unrelated to the asset pipeline.". I suppose it is unrelated to the asset pipeline in that it is just serving up the assets in the public folder and does not look at our assets directory. I also see that heroku runs the precompile command upon deployment, so I don't need to do that each time.

This makes me wonder if the way I am calling my assets using the image_tag could be the problem, but I am not sure why that would be?

Update 3: The rails guide for the asset pipeline says "In regular views you can access images in the public/assets/images directory like this: <%= image_tag "rails.png" %>. I am calling for my image using this convention like so <%= image_tag("lab49", size: "80x30") %>, but the image will still not appear.

Update 4: See my answer.

解决方案

If you came to this post and you are using Heroku, Heroku will accept your images only if you use the image file extension.

This will work:

<%= image_tag "lab49.png", size: "80x30" %>

This will not work (although it will locally):

<%= image_tag "lab49", size: "80x30" %>

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