Why asset management matters in Ruby on Rails - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to include the main CSS file in a Rails view.

Ruby on Rails

<%= stylesheet_link_tag '[1]', media: 'all' %>

Drag options to blanks, or click blank then click option'

Astyle

Bmain

Capplication

Ddefault

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent stylesheet name.

Forgetting to include the file extension.

The stylesheet_link_tag helper includes CSS files. By default, Rails uses application.css as the main stylesheet.

2fill in blank

medium

Complete the code to include a JavaScript file in a Rails view.

Ruby on Rails

<%= javascript_include_tag '[1]' %>

Drag options to blanks, or click blank then click option'

Aapplication

Bscript

Cmain

Ddefault

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect file names.

Omitting the helper method.

The javascript_include_tag helper includes JavaScript files. Rails uses application.js as the default JavaScript pack.

3fill in blank

hard

Fix the error in the asset pipeline configuration to precompile additional assets.

Ruby on Rails

Rails.application.config.assets.precompile += ['[1]']

Drag options to blanks, or click blank then click option'

Amain.js

Bcustom.js

Capplication.css

Dstyle.css

Attempts:

3 left

💡 Hint

Common Mistakes

Adding default files unnecessarily.

Using incorrect file names.

To add extra files to the asset pipeline precompile list, specify their exact names like 'custom.js'. 'application.css' is already precompiled by default.

4fill in blank

hard

Fill both blanks to create a helper method that returns the path to an asset and its digest fingerprint.

Ruby on Rails

def asset_path(name)
  Rails.application.assets.[1].digest_path(name) || [2]
end

Drag options to blanks, or click blank then click option'

Amanifest

Basset_manifest

Cassets

Dasset_pipeline

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect method or object names.

Confusing asset pipeline terms.

The manifest holds the fingerprinted asset paths. The asset_manifest is used to fallback if the asset is not found.

5fill in blank

hard

Fill all three blanks to configure Rails to serve static assets with cache control headers.

Ruby on Rails

Rails.application.config.public_file_server.[1] = true
Rails.application.config.public_file_server.headers = {
  'Cache-Control' => '[2]',
  'Expires' => [3]
}

Drag options to blanks, or click blank then click option'

Aenabled

BCache-Control: max-age=31536000, public

C1.year.from_now.httpdate

Dcache_enabled

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong config keys.

Incorrect header formats.

Not enabling static file serving.

Setting enabled to true allows serving static files. The Cache-Control header sets caching duration, and Expires sets the expiration date.