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POImages don't resolve correctly using Rails asset pipeline in development mode
 

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  1. POImages don't resolve correctly using Rails asset pipeline in development mode
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    <p><strong>TL;DR</strong> <code>asset_data_uri</code> works but <code>asset_path</code> does not.</p> <p>I recently switched from a homegrown + jammit asset pipeline over to the Rails asset pipeline in hopes that I could ditch a bunch of code and have most everything taken care of for me. I have everything working fine in production (unlike most people on stackoverflow), however, in development mode images won't show up.</p> <p><strong>I've noticed a few things.</strong></p> <ul> <li>In order to get images to show up correctly, I must precompile <em>in development mode</em> so they can be correctly referenced via css. Unfortunately, precompiling in dev mode precompiles javascript as well.</li> <li>When <em>not</em> precompiling in dev mode, images located in app/assets/images requested using <code>asset_data_uri()</code> show up fine. However, the same images using <code>asset_path()</code> do not. For example, in my initialize.css.erb file, <code>&lt;%= asset_data_uri "cork.bg.gif" %&gt;</code> displays fine, but <code>&lt;%= asset_path "cork.bg.gif" %&gt;</code> doesn't. This is because Rails resolves the path down to /assets/cork.bg.gif, and there's no image that lives in that location (i.e., public/assets/cork.bg.gif)</li> <li>Precompiling using <code>rake assets:precompile RAILS_ENV=development</code> gets me my images in the right spot so they can be served from public/assets, but it also stifles development because now changes to JS files are cached until I precompile again.</li> </ul> <p>So what can I do? Here is the related configuration. Let me know if there's anything else I can provide:</p> <p><strong>In application.rb:</strong></p> <pre><code>config.assets.enabled = true config.assets.version = '1.0' </code></pre> <p><strong>In development.rb:</strong></p> <pre><code>config.assets.compile = true config.assets.compress = false config.assets.debug = true </code></pre> <p>Note: I've read a bunch about <code>config.serve_static_assets</code> being involved. It's currently commented out in development.rb, so it's whatever the default version is on Rails 3.2.13.</p> <p><strong>An example: initialize.css.erb</strong></p> <p>My images are located in app/assets/images. The example image I'm using is located at app/assets/images/cork.bg.gif.</p> <p>Works:</p> <pre><code>body { background-image: url(&lt;%= asset_data_uri "cork.bg.gif" %&gt;); } </code></pre> <p>Doesn't work:</p> <pre><code>body { background-image: url(&lt;%= asset_path "cork.bg.gif" %&gt;); } </code></pre>
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    1. USTim Coulter
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      1. POImages don't resolve correctly using Rails asset pipeline in development mode
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    1. COWhere are your images ?
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      1. POImages don't resolve correctly using Rails asset pipeline in development mode
      1. USFrederick Cheung
    2. COapp/assets/images
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      1. POImages don't resolve correctly using Rails asset pipeline in development mode
      1. USTim Coulter
    3. COYour comment isn't exactly correct: "This is because Rails resolves the path down to /assets/cork.bg.gif, and there's no image that lives in that location (i.e., public/assets/cork.bg.gif)". When the pipeline is enabled in development, it mounts a route at "/assets" that is served by Rails. That means it doesn't look in the public directory.
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      1. POImages don't resolve correctly using Rails asset pipeline in development mode
      1. USRoss Allen
 

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