Session handling in Ruby on Rails - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a session value in a Rails controller.

Ruby on Rails

session[:user_id] = [1]

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

Aflash[:user_id]

Bparams[:user_id]

Ccookies[:user_id]

Drequest.user_id

Attempts:

3 left

💡 Hint

Common Mistakes

Using cookies or flash instead of params to set session data.

Trying to assign a method call that doesn't return the user ID.

In Rails, session values are usually set from parameters received in the request, such as params[:user_id].

2fill in blank

medium

Complete the code to retrieve the current user ID from the session in a Rails controller.

Ruby on Rails

current_user_id = session[1]

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

A[:user_id]

B['user_id']

C.user_id

D(user_id)

Attempts:

3 left

💡 Hint

Common Mistakes

Using string keys instead of symbols.

Using dot notation which is invalid for session hash.

Session keys in Rails are accessed using symbols inside square brackets, like session[:user_id].

3fill in blank

hard

Fix the error in the code to clear the session in a Rails controller.

Ruby on Rails

def logout
  [1]
  redirect_to root_path
end

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

Asession.delete(:user_id)

Bsession.destroy

Csession.reset

Dsession.clear

Attempts:

3 left

💡 Hint

Common Mistakes

Using session.delete which removes only one key.

Using session.destroy which is not a valid method.

To clear all session data in Rails, use session.clear. Other methods either delete a single key or do not exist.

4fill in blank

hard

Fill both blanks to check if a user is logged in by verifying the session key.

Ruby on Rails

if session[1] && session[2] != nil
  # user is logged in
end

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

A[:user_id]

B['user_id']

C.user_id

D(user_id)

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing string and symbol keys.

Using dot notation which is invalid.

To check if a user is logged in, verify the presence of session[:user_id]. Using symbol keys consistently is best practice.

5fill in blank

hard

Fill all three blanks to create a session hash storing user name and role if the user is admin.

Ruby on Rails

if params[:role] == 'admin'
  session[1] = params[:name]
  session[2] = params[:role]
  flash[:notice] = 'Admin logged in as ' + session[3]
end

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

A[:user_name]

B[:user_role]

D[:admin]

Attempts:

3 left

💡 Hint

Common Mistakes

Using different keys for storing and retrieving the user name.

Using invalid keys like :admin which is not set.

Store the user's name in session[:user_name] and role in session[:user_role]. Use the same key to display the name in the flash message.