Setting

Create Controller

rails g controller questions index show new edit

create app / controllers / questions_controller.rb

route get 'questions/index'
get 'questions/show'
get 'questions/new'
get 'questions/edit'

invoke erb

create app / views / questions
create app / views / questions / index.html.erb
create app / views / questions / show.html.erb
create app / views / questions / new.html.erb
create app / views / questions / edit.html.erb

invoke test_unit
create test / controllers / questions_controller_test.rb

invoke helper
create app / helpers / questions_helper.rb
invoke test_unit

invoke assets
invoke scss
create app / assets / stylesheets / questions.scss

routes.rb

get 'questions/index'
get 'questions/show'
get 'questions/new'
get 'questions/edit'

Create Model

rails g model question name:string title:string content:text

invoke  active_record
create    db/migrate/20210408182548_create_questions.rb
create    app/models/question.rb

invoke    test_unit
create      test/models/question_test.rb
create      test/fixtures/questions.yml

db/migrate/20210408182548_create_questions.rb

class CreateQuestions < ActiveRecord::Migration[6.1]
  def change
    create_table :questions do |t|
      t.string :name
      t.string :title
      t.text :content

      t.timestamps
    end
  end
end

rails db:migrate

rails db

sqlite> .schema

REATE TABLE sqlite_sequence(name,seq); CREATE TABLE IF NOT EXISTS "questions" ("id" integer PRIMARY KEY AUTOINCREMENT NOT NULL, "name" varchar, "title" varchar, "content" text, "created_at" datetime(6) NOT NULL, "updated_at" datetime(6) NOT NULL);

routes

  # get 'questions/index'
  # get 'questions/show'
  # get 'questions/new'
  # get 'questions/edit'
 
  resources :questions

rails routes

                  questions GET    /questions(.:format)                                                                              questions#index
                            POST   /questions(.:format)                                                                              questions#create
               new_question GET    /questions/new(.:format)                                                                          questions#new
              edit_question GET    /questions/:id/edit(.:format)                                                                     questions#edit
                   question GET    /questions/:id(.:format)                                                                          questions#show
                            PATCH  /questions/:id(.:format)                                                                          questions#update
                            PUT    /questions/:id(.:format)                                                                          questions#update
                            DELETE /questions/:id(.:format)                                                                          questions#destroy