Member and collection routes in Ruby on Rails - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a member route in Rails routing?

A member route is a custom route that acts on a single resource identified by its ID. It adds a route that requires the resource's ID in the URL.

beginner

What is a collection route in Rails routing?

A collection route is a custom route that acts on the entire collection of resources, without needing an ID in the URL.

intermediate

How do you define a member route in Rails routes.rb file?

Inside a resource block, use member do and then define the HTTP verb and action, for example:<br>resources :books do<br> member do<br> get 'preview'<br> end<br>end

intermediate

How do you define a collection route in Rails routes.rb file?

Inside a resource block, use collection do and then define the HTTP verb and action, for example:<br>resources :books do<br> collection do<br> get 'search'<br> end<br>end

beginner

What is the difference in URL structure between member and collection routes?

Member routes include the resource ID in the URL, like /books/:id/preview. Collection routes do not include an ID, like /books/search.

Which route type requires the resource ID in the URL?

A Namespace route

B Collection route

C Member route

D Root route

Member routes act on a single resource and include the resource ID in the URL.

How do you define a collection route inside a resource block?

A Using <code>collection do</code>

B Using <code>resource do</code>

C Using <code>member do</code>

D Using <code>namespace do</code>

Collection routes are defined inside collection do blocks.

What URL would a member route named 'preview' generate for a book with ID 5?

A /books/5/preview

B /books/preview

C /preview/books/5

D /books/5

Member routes include the resource ID, so the URL is /books/5/preview.

Which HTTP verb is commonly used for a collection route that lists filtered results?

A DELETE

B GET

C POST

D PUT

GET is used to retrieve filtered lists in collection routes.

If you want to add a custom action that applies to all books, which route type should you use?

A Root route

B Member route

C Singular resource route

D Collection route

Collection routes apply to the entire set of resources.

Explain the difference between member and collection routes in Rails with examples.

Think about whether the route needs an ID or not.

How do you add a custom action to a resource in Rails routes.rb using member and collection blocks?

Remember the block names and URL patterns.