A blog about software by Alexander Yaäkov Garber.

CRUD Basics

crud api rails
Published on 30 Mar 2020

HTTP Verbs

VERB Usage Multiple Requests Cache / Bookmark
GET links yes yes
POST forms no no
PATCH forms yes no
DELETE forms yes no

Standard CRUD Actions in Rails

CRUD Action Description Example URL HTTP Verb
READ index List records /subjects GET
READ show Display a single record /subjects/show/:id GET
CREATE new Display new record form /subjects/new GET
CREATE create Process new record form /subjects/create POST
UPDATE edit Display an edit record form /subjects/edit/:id GET
UPDATE update Process edit record form /subjects/update/:id PATCH/PUT
DELETE delete Display delete record form /subjects/delete/:id GET
DELETE destroy Process delete record form /subjects/destroy/:id DELETE

Useful resource: https://guides.rubyonrails.org/routing.html#crud-verbs-and-actions

Default Resourceful Routes


# config/routes.rb

# Provides `index`, `show`, `new`, `create`, `update`
resources :subjects

# Provides the above and `delete`.
resources :subjects do
    # operates on an existing member of the resource,
    # i.e. expect to receive a member :id in the URL
    member do
        get :delete
    end
    
    # DOES NOT operate on an existing member
    # i.e. DOES NOT expect to receive a member :id in the url
    controller do
        get :export
    end
end

# Provides `index`, `new`, `create`, `update` BUT NOT `show`
resources :admin_users, except: [:show]

# Provides `index` and `show` ONLY
resources :products, only: [:index, :show]

related posts