Route constraints in Ruby on Rails - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a constraint that only allows numeric IDs in the route.

Ruby on Rails

get '/products/:id', to: 'products#show', constraints: { id: /[1]/ }

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

A[A-Z]+

B[a-z]+

C\w+

D\d+

Attempts:

3 left

💡 Hint

Common Mistakes

Using letters instead of digits in the regex.

Forgetting to escape backslashes.

The regex \d+ matches one or more digits, ensuring the :id parameter is numeric.

2fill in blank

medium

Complete the code to restrict the route to only accept HTTP GET requests.

Ruby on Rails

match '/search', to: 'search#index', via: :[1]

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

Apost

Bdelete

Cget

Dput

Attempts:

3 left

💡 Hint

Common Mistakes

Using POST or other HTTP methods instead of GET.

The via: :get option restricts the route to only respond to GET requests.

3fill in blank

hard

Fix the error in the route constraint to only allow lowercase letters for the username parameter.

Ruby on Rails

get '/users/:username', to: 'users#show', constraints: { username: /[1]/ }

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

A[a-z]+

B[A-Z]+

C[a-zA-Z]+

D\d+

Attempts:

3 left

💡 Hint

Common Mistakes

Using uppercase or digits in the regex.

Using a regex that allows uppercase letters.

The regex [a-z]+ matches one or more lowercase letters, restricting the username accordingly.

4fill in blank

hard

Fill both blanks to create a route that only matches subdomains 'admin' or 'api'.

Ruby on Rails

constraints subdomain: /[1]|[2]/ do
  get '/dashboard', to: 'dashboard#index'
end

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

Aadmin

Buser

Capi

Dguest

Attempts:

3 left

💡 Hint

Common Mistakes

Including subdomains not intended to match.

Using commas instead of pipe in regex.

The regex admin|api matches either 'admin' or 'api' subdomains for the route.

5fill in blank

hard

Fill all three blanks to define a route with constraints on HTTP method, subdomain, and numeric ID.

Ruby on Rails

constraints subdomain: /[1]/ do
  match '/items/:id', to: 'items#show', via: :[2], constraints: { id: /[3]/ }
end

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

Aapi

Bget

C\d+

Dadmin

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong subdomain or HTTP method.

Not using regex for numeric ID.

The route matches requests on the 'admin' subdomain, only GET method, and numeric IDs using \d+.