Gemfile and dependency management in Ruby on Rails - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify a gem dependency in the Gemfile.

Ruby on Rails

gem '[1]'

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

Arails

Bbundle

Cruby

Dgemfile

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'bundle' or 'gemfile' which are not gem names.

Confusing the gem name with Ruby language.

The gem method in the Gemfile is used to declare a gem dependency by its name, such as rails.

2fill in blank

medium

Complete the code to specify a gem with a version constraint in the Gemfile.

Ruby on Rails

gem 'nokogiri', '[1] 1.13.3'

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

A<=

B>=

C~>

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' which locks to exact version.

Using '>=' which allows any newer version.

The ~> operator means 'compatible with version', allowing patch updates but not major version changes.

3fill in blank

hard

Fix the error in the Gemfile line to specify a group for development gems.

Ruby on Rails

group :[1] do
  gem 'pry'
end

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

Adevelopment

Btest

Cproduction

Dstaging

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'test' group for development-only gems.

Using 'production' which is for live environment.

The development group is used to specify gems only needed during development, like debugging tools.

4fill in blank

hard

Fill both blanks to specify a gem with a platform restriction and a version in the Gemfile.

Ruby on Rails

gem 'sqlite3', platform: :[1], '[2] 1.4.2'

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

Aruby

B~>

C>=

Dwindows

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'ruby' as platform when restricting to Windows.

Using '>=' which allows too broad versions.

The platform option restricts the gem to certain systems like windows. The ~> operator specifies a compatible version.

5fill in blank

hard

Fill all three blanks to create a group block for test and development gems with a version constraint.

Ruby on Rails

group :[1], :[2] do
  gem 'rspec-rails', '[3] 5.0.0'
end

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

Atest

Bdevelopment

C~>

Dproduction

Attempts:

3 left

💡 Hint

Common Mistakes

Including 'production' in the group for test gems.

Using '==' instead of '~>' for version.

The group can take multiple environments like :test and :development. The version operator ~> allows compatible updates.