View (Practice) | Ruby on Rails

Task

Create the models Author(name) and Post(title, description, author_id). Create a PostsController with two actions: index and show. For these actions, also create routes and the corresponding views. On the index page, display all posts, and on the show page — a single selected post. Create an AuthorsController with actions index and show. On this controller’s index page, display all authors, and on the show page — information about a specific author and their posts. Provide the ability to navigate to an author’s page from a post’s page.

Let’s go through a step-by-step solution to our task.

• Create the Author(name) and Post(title, description, author_id) models.
• Create a PostsController with two actions: index and show. For these actions, also create routes and the corresponding views. On the index page, display all posts, and on the show page — a single selected post.
• Create an AuthorsController with actions index and show. On this controller’s index page, display all authors, and on the show page — information about a specific author and their posts.
• Provide the ability to navigate to an author’s page from a post’s page.

 

First step (creating the models)

Let’s create the authors table in the database.

rails generate model Author name:string

class CreateAuthors < ActiveRecord::Migration[7.1]  def change    create_table :authors do |t|      t.string :name      t.timestamps    end  endend

Let’s create the posts table in the database.

rails generate model Post title:string description:text author:references{foreign_key:true}

class CreatePosts < ActiveRecord::Migration[7.1]  def change    create_table :posts do |t|      t.string     :title      t.text       :description      t.references :author, foreign_key: true      t.timestamps    end  endend

Now let’s set up our "one-to-many" association for these models.

class Post < ApplicationRecord  belongs_to :authorend

class Author < ApplicationRecord  has_many :postsend

 

Second step (creating MVC for posts)

Let’s create a PostsController with the index and show actions.

class PostsController < ApplicationController  def index    @posts = Post.all  end  def show    @post = Post.find(params[:id])  endend

In index we output all posts from the database, and in show we output a single post by id.

 

Create routes for these actions.

Rails.application.routes.draw do  root "posts#index"  resources :posts, only: %i[index show]end

After that, we need the corresponding views for the index and show actions. Display a list of posts on the index page.

# app/views/posts/index.html.slimh1 Posts= render partial: 'post', collection: @posts

# app/views/posts/_post.html.slim.post  h1 = post.title  p = post.description  h5 = post.author.name  = link_to 'View', post_path(post.id)

 In the show.html.slim view, we can access a single post.

# app/views/posts/show.html.slimh1 = @post.titlep = @post.description= link_to 'All posts', posts_path

 

Third step (creating MVC for authors)

Let’s create an AuthorsController with the index and show actions.

class AuthorsController < ApplicationController  def index    @authors = Author.all  end  def show    @author = Author.find(params[:id])    @posts = @author.posts  endend

In index we output all authors from the database, and in show we output a single post by id.

 

Create routes for these actions as well (routes.rb).

resources :authors, only: %i[index show]

After that, we need the corresponding views for the index and show actions. Display a list of authors on the index page.

Display a list of authors on the index page.

# app/views/authors/index.html.slimh1 Authors= render partial: 'author', collection: @authors= link_to 'All posts', posts_path

# app/views/authors/_author.html.slim.author  h1 = author.name  = link_to 'View', author_path(author.id)

 In the show.html.slim view, we can access a single post.

# app/views/authors/show.html.slimh1 = @author.name- if @posts  h3 List of the author's posts  = render partial: 'posts/post', collection: @posts= link_to 'Go back', authors_path

Also, let’s provide the ability on the posts/index.html.slim page to go to the authors/index.html.slim page

# app/views/posts/index.html.slim...= link_to 'All authors', authors_path

 

Fourth step (ability to navigate to an author’s page)

Provide the ability to navigate to an author’s page from a post’s page.

# app/views/posts/show.html.slimh1 = @post.titlep = @post.descriptionspan Author:   = link_to @post.author.name, author_path(@post.author_id)br= link_to 'All posts', posts_path

 

Conclusion

So, this is one of the solutions to our task. You may have solved it in other ways. If you know how to implement certain parts of our task better, then write in the comments.