Rails 3.1 Actioncontroller::Routingerror (No Route Matches [Get] "/Assets/Rails.Png"):

rails 3.1 ActionController::RoutingError (No route matches [GET] /assets/rails.png ):

It must have been an rc4 issue as the final release didn't have this issue.

11/27/11 - I now wonder if this was just due to the asset pipeline that was introduced in rails 3.1, requiring the rake assets:precompile command (compiles and copies images, css and js from app/assets to public/.

If anyone finds that to be the case, please add a comment!

no route matches for assets/images in Rails

Actually you cannot reference your image with /assets/home.png path.
It will work in development mode, but in production all of your assets have a fingerprint in their filename (read this http://guides.rubyonrails.org/asset_pipeline.html#what-is-fingerprinting-and-why-should-i-care-questionmark)

That's why, in assets-pipeline enabled applications you need to reference all of your assets using helper methods. Read this doc to learn about the different helpers available in Ruby, JS and Sass files: http://guides.rubyonrails.org/asset_pipeline.html#coding-links-to-assets

Rails 3.1.3 on Heroku: (No route matches [GET] /assets/rails.png )

It looks like you may not have precompiled your assets before you pushed to Heroku, try:

rake assets:precompile
git add .
etc etc

I think that should help. For more information, see here: http://devcenter.heroku.com/articles/rails31_heroku_cedar

How to solve ' No route matches [GET] image.png ' when I moved image to assets image path?

Everything in subdirectories of assets (regardless whether it is an image, JS, etc.) is by default available under /assets/name.extension. So just make sure you refer to the image with the path /assets/login_logo.png, or use the asset_path helper:

<%= asset_path('login_logo.png') %>

why am i getting this routing error? ActionController::RoutingError (No route matches [GET] /assets/toastr.js.map ):

I came across a similar problem recently. The way I solved it was by going inside the manifest file (e.g., public/assets/.sprockets-manifest-[md5hash].json, finding the logical names of the asset files and using those instead of the absolute paths.

In my case, the fix was to remove the /assets/ prefix from the javascript_include_tag.

In particular, in my html files I replaced this...

= javascript_include_tag "/assets/admin/events/index.js"

...with this...

= javascript_include_tag "admin/events/index.js"

...and recompiled assets. This seemed to do the trick for me.

Here's a reference to the thread where I found this solution:

Rails 5 + Heroku: Assets are not loaded in production, but works in localhost

ActionController::RoutingError (No route matches [GET] /assets/javascripts

You need to include these files in application.js manully or just write //= require_tree . to load all js

Similarly, you have to work for css. Add *= require_tree . in application.css.

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