Route parameters in Ruby on Rails - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a route that captures an :id parameter.

Ruby on Rails

get '/products/[1]', to: 'products#show'

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

A*id

Bid

C:id

D?id

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the colon before the parameter name.

Using a question mark or asterisk instead of a colon.

The route parameter must be prefixed with a colon : to capture it as a variable.

2fill in blank

medium

Complete the code to access the route parameter :id inside the controller action.

Ruby on Rails

def show
  @product = Product.find(params[[1]])
end

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

A:id

B'id'

Cid

D:'id'

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting quotes around the key (syntax error with bare id).

Using ":id" (accesses nonexistent params[":id"]).

In Rails controllers, route parameters are conventionally accessed using strings as keys in the params hash, like params['id']. The option 'id' is the correct string key.

3fill in blank

hard

Fix the error in the route to correctly capture a username parameter.

Ruby on Rails

get '/users/[1]', to: 'users#profile'

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

A:username

Busername

C*username

D?username

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the colon before the parameter name.

Using wildcard or query syntax instead of colon.

The route parameter must have a colon prefix to be recognized as a parameter.

4fill in blank

hard

Fill both blanks to define a nested route with :post_id and :comment_id parameters.

Ruby on Rails

get '/posts/[1]/comments/[2]', to: 'comments#show'

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

A:post_id

Bpost_id

C:comment_id

Dcomment_id

Attempts:

3 left

💡 Hint

Common Mistakes

Leaving out colons before parameter names.

Using parameter names without colon prefixes.

Both parameters must have a colon prefix to be recognized as route parameters.

5fill in blank

hard

Fill all three blanks to define a route with :category, :id, and :format parameters.

Ruby on Rails

get '/[1]/[2].[3]', to: 'items#show'

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

A:category

B:id

C:format

Dformat

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting colons before parameter names.

Not including the dot before the format parameter.

All route parameters must have a colon prefix to be recognized by Rails routing.