问题
I generated a scaffold in ruby and I want to insert a background image to every page on the site but Im not sure what the link to the image should be.
my image is in app/assets/images/"dep.jpg"
this is what i have but it isnt working:
background-image:url('../images/dep.jpg');
}
Any help? thanks
回答1:
The webserver in rails takes public folder as the base of the application. Hence its looking for the specific image under /public/images/ instead of app/assets/images/"dep.jpg" & since its not there over there you cannot get the image. Try to put your image in /public/images/ folder then it would work.
Edit: If you are using rails 3.1 then this would be different as Rails 3.1 uses the concept of asset pipeline for the assets of your application so then then path app/assets/images/dep.jpg would obviously work.
回答2:
In Rails 3.1, the path will actually be `/assets/dep.jpg':
background-image: url(/assets/dep.jpg);
If you convert your scaffold.css file to a Sass file (rename to scaffold.css.scss) then you can use the helper:
background-image: image-url("dep.jpg");
回答3:
If your image is in app/assets/images/dep.jpg, then in the css file in rails you should write background: url('/assets/dep.jpg');
You don't have to put the image in the public folder this way.
回答4:
background: url('/assets/image_name.jpg');
This worked for me in Rails 4.0
回答5:
You can use absolute path for sure:
background-image:url('/images/dep.jpg');
回答6:
If you are using a modern version of rails (3.1 or later I believe), you can use:
background: url('../dep.jpg');
Since the css also lives in your assets folder .. automatically refers to the assets folder.
来源：https://stackoverflow.com/questions/9024252/adding-a-background-image-in-ruby-on-rails-2-in-css