Rails: File to import not found or unreadable: "bootstrap"

Question

I am relatively new to programming, therefore I hope that the question is not absolutely stupid.

I got a problem concerning my rails app.

I try to use bootstrap. I built a file called "custom.css.scss" and used the "@import "bootstrap"" line in it.

The problem is: Each time I save my "custom.css.scss" file a new file "custom.css" is automatically generated and I get the following message: "custom.css.scss File to import not found or unreadable:bootstrap".

The funny thing is: When I delete the file "custom.css.scss" and refresh my browser, everything is fine (which means: bootstrap is used).

Do you have any idea, what could be the reason?

Kindest regards Chris

P.S.: This is my installed gem file

source 'https://rubygems.org'

gem 'rails', '3.2.11'
gem 'bootstrap-sass', '2.1'
gem 'bcrypt-ruby', '3.0.1'
gem 'faker', '1.0.1'
gem 'will_paginate', '3.0.3'
gem 'bootstrap-will_paginate', '0.0.6'
gem 'jquery-rails', '2.0.2'

group :development, :test do
  gem 'sqlite3', '1.3.5'
  gem 'rspec-rails', '2.11.0'
  # gem 'guard-rspec', '1.2.1'
  # gem 'guard-spork', '1.2.0'  
  # gem 'spork', '0.9.2'
end

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '3.2.5'
  gem 'coffee-rails', '3.2.2'
  gem 'uglifier', '1.2.3'
end

group :test do
  gem 'capybara', '1.1.2'
  gem 'factory_girl_rails', '4.1.0'
  gem 'cucumber-rails', '1.2.1', :require => false
  gem 'database_cleaner', '0.7.0'
  gem 'launchy', '2.1.0'
  # gem 'rb-fsevent', '0.9.1', :require => false
  # gem 'growl', '1.0.3'
end

group :production do
  gem 'pg', '0.12.2'
end

The custom.css.scss file look like this

@import "bootstrap";

/* universal */

html {
    overflow-y:scroll
}

body {
    padding-top: 60px
}

section {
    overflow: auto;
}

textarea {
    resize: vertial;
}

.center {
    text-align: center;
}

.center h1 {
    margin-bottom: 10px;
}

/* typography */

h1, h2, h3, h4, h5, h6 {
    line-height: 1
}

h1 {
    font-size: 3em;
    letter-spacing: -2px;
    margin-bottom: 30px;
    text-align: center;
}

h2 {
    font-size: 1.7em;
    letter-spacing: -1px;
    margin-bottom: 30px;
    text-align: center;
    font-weight: normal;
    color: #999;
}

p {
    font-size: 1.1em;
    line-height: 1.7em;
}

Answer 1

I had a similar problem and saw Habax's solution and tried the last step first.

I just restarted the server.

That turned out to be enough. Hope that helps.

Answer 2

I had a similar issue when working on a Rails 6 application with Bootstrap 4.

The issue was that I did not specify the node modules full path of the bootstrap.scss file in my app/assets/stylesheets/application.scss file.

After installing Bootstrap 4 and its dependencies using this command:

yarn add bootstrap jquery popper.js

All I needed to do was to modify it from:

@import "bootstrap";

to

@import 'bootstrap/scss/bootstrap';

You can then add require the boostrap.js file in the app/javascript/packs/application.js file this way:

require("bootstrap");

That's all.

I hope this helps

Answer 3

I had a similar issue, and I changed the file type from css to scss. I bet if you erase '.css' from your file name it'll work.

Answer 4

Had the same issue in a new application, but restarting the development server solved the issue.