rails-cheat-sheet: A repository from jheart-vic

THIS IS A RAILS CHEAT SHEET

INSTALLING RAILS APP WITH POSTGRES

rails new myapp --database=postgresql

CHANGING DATABASE

add your username and password to database.yml

CREATING A DATABASE

rails db:create

ADDING DEVISE

gem 'devise'
bundle install
rails generate devise:install
(add config.action_mailer.default_url_options = { host: 'localhost', port: 3000 } to config/environmrnt/development.rb)
(add root 'posts#index' to routes.rb)
rails generate devise:views
rails generate devise User
rails db:migrate

Add :turbo_stream as a navigational format. This line goes in config/initializers/devise.rb.

    config.navigational_formats = [:html, :turbo_stream]

CREATING BASE SCAFFOLD WITH REFERENCE TO USER

rails generate scaffold Post title:string body:text user:references
rails db:migrate

ADD BEFORE ACTION TO BASE CONTROLLER (POSTS CONTROLLER)

This ensures that a user is logged in before they can create a post
before_action :authenticate_user!

ADD EXTRA FIELDS TO USER TABLE

rails generate migration add_fieldname_to_tablename fieldname:string
rails generate migration add_name_to_users name:string
rails db:migrate

ADD EXTRA INPUT FIELDS IN DEVISE REGISTRATION FORM

ADD HAS MANY TO USER MODEL

has_many :posts

ADD CODE TO ALLOW ONE TO ADD EXTRA DETAILS ON SIGNING UP

in app/controllers/application_controller.rb

before_action :configure_permitted_parameters, if: :devise_controller?

protected

def configure_permitted_parameters
  devise_parameter_sanitizer.permit(:sign_up, keys: [:firstname, :lastname])
end

ADD EXTRA FIELS IN VIEWS FOR REGISTRATION

<%= f.label :name %>
<%= f.text_field :name, autofocus: true, autocomplete: "name" %>

REMOVE EXTRA ALERTS FROM LAYOUTS/APP.HTML.ERB

<p class="notice"><%= notice %></p>
<p class="alert"><%= alert %></p>

remove these two

REMOVE USER ID FROM NEW POST VIEWS

<div>
<%= form.label :user_id, style: "display: block" %>
<%= form.text_field :user_id %>

CONFIGURE CURRENT USER IN POSTS CONTROLLER

add this line to create , new and edit methods @post.user = current_user

REMOVE USER ID IN POST PARAMS IN POSTS CONTROLLER

def post_params
  params.require(:post).permit(:title, :text)
end

TO ONLY SEE POSTS FOR CURRENT USER

def index
  @posts = Post.where(user_id: current_user.id)
end

ADD NESTED SCAFFOLD GEM

    gem 'nested_scaffold'
    bundle install

CREATED SCAFFOLD

        rails generate nested_scaffold PARENT_NAME/NAME [field:type field:type] [options]

        rails g nested_scaffold post/comment  text:string  post:references user:references
        rails db:migrate

CONFIGURE NESTED ROUTES

resources :posts do
  resources :comments
end

REMOVE USER ID AND POST FROM NEW COMMENT VIEW

<div>
<%= form.label :user_id, style: "display: block" %>
<%= form.text_field :user_id %>
</div>

<div>
<%= form.label :post_id, style: "display: block" %>
<%= form.text_field :post_id %>
</div>

ADD CODE TO ALLOW DELETING POSTS THAT HAVE COMMENTS

has_many :comments , dependent: :destroy

ADD CODE TO CONFIGURE CURRENT USER TO COMMENT

add this line to comments controller (create , new and edit methods) @comment.user_id = current_user.id

CHANGE UPDATE METHOD IN COMMENTS CONTROLLER

 def update
    @comment.user_id = current_user.id
     @comment.post_id = @post.id
    @comment.update(comment_params)
     redirect_to post_comments_url(@post)

 end

CHANGE DELETE BUTTON TO

<%= button_to 'Destroy', [comment.post, comment], method: :delete, data: { confirm: 'Are you sure?' } %>

TO HAVE A HOME PAGE BEFORE AUTHETICATION AND WITH LINKS FOR SIGN IN AND SIGN UP

rails generate controller home index

ADD THIS TO ROUTES

 authenticated :user do
root "categories#index", as: :authenticated_root

end

root to: "home#index"

ADD THIS TO HOME INDEX VIEW

<%= link_to "Sign up", new_user_registration_path %> <%= link_to "Log in", new_user_session_path %>

FOR SIGNING OUT ADD THIS TO THE ROUTES

devise_scope :user do get '/users/sign_out' => 'devise/sessions#destroy' end

TO SIGN OUT

<%= link_to "Sign Out", destroy_user_session_path %>

<%= link_to "Sign In", new_user_session_path %>

<%= link_to "Sign Up", new_user_registration_path %>

PUSHING TO HEROKU

switch to master branch

    heroku login
    heroku create
    heroku stack

    heroku stack:set heroku-18

    git push heroku master

    heroku run rails db:migrate

CREATING RAILS API ONLY APP

rails new my_first_rails_api --api --database=postgresql

CREATE MODEL

rails g model dog name:string age:integer

CREATE MIGRATION

rails db:migrate

CREATE CONTROLLER

rails g controller Api/v1/dogs

jheart-vic/rails-cheat-sheet