• Let's do a blog website using ruby om rails with postgresql and less CSS　as style sheet. The blog database will have table such as author, posts, tag.... Each author will have multiple posts. While the post will have a tag to classify the post as political, art, etc., User should be able to search, list according to authors, CRUD. And also be able to list according to authors and tags. The search should be able to do it with Japanese Characters.

Sure, I can help you with that! Here's a step-by-step guide to building a blog website using Ruby on Rails with PostgreSQL and Less CSS style sheet.

Step 1: Set up your Rails project To create a new Rails project, open your terminal and type:

rails new my-blog --database=postgresql

This will create a new Rails project with PostgreSQL as the default database.

Step 2: Generate the Author, Post, and Tag models

To generate the models for Author, Post, and Tag, open your terminal and type:

rails generate model Author name:string email:string
rails generate model Post title:string body:text author:references tag:references
rails generate model Tag name:string

This will create the necessary database tables for your blog.

Step 3: Migrate the database

To migrate the database, run the following command in your terminal:

rails db:migrate

This will create the necessary database tables for your blog.

Step 4: Create the controller

To create a controller for your blog, open your terminal and type:

rails generate controller Posts index show

This will generate a controller with the index and show actions for the Post model.

Step 5: Set up the routes

To set up the routes for your blog, open your config/routes.rb file and add the following code:

Rails.application.routes.draw do
  resources :posts
end

This will create the necessary routes for your blog.

Step 6: Add the Less CSS style sheet

To add the Less CSS style sheet to your Rails project, you can use the less-rails gem. Add the following line to your Gemfile:

gem 'less-rails'

Then run bundle install in your terminal to install the gem.

Step 7: Create the views

To create the views for your blog, open the app/views/posts folder and create the index.html.erb and show.html.erb files. Here's an example of what the index.html.erb file might look like:

<h1>Posts</h1>
<ul>
  <% @posts.each do |post| %>
    <li>
      <%= link_to post.title, post %>
      <p>Author: <%= post.author.name %></p>
      <p>Tag: <%= post.tag.name %></p>
    </li>
  <% end %>
</ul>

This code will display a list of all the posts, along with the author and tag for each post.

Step 8: Implement the search functionality

To implement the search functionality for your blog, you can use the ransack gem. Add the following line to your Gemfile:

gem 'ransack'

Then run bundle install in your terminal to install the gem.

Next, open your app/controllers/posts_controller.rb file and add the following code:

def index
  @q = Post.ransack(params[:q])
  @posts = @q.result.includes(:author, :tag)
end

This code sets up the search using the ransack gem and includes the author and tag associations for each post.

Step 9: Test your blog

To test your blog, run the following command in your terminal:

rails server

Then open your web browser and go to http://localhost:3000/posts. You should see a list of all the posts on your blog.

Congratulations! You've successfully created a blog website using Ruby on Rails with PostgreSQL and Less CSS style sheet, and implemented search functionality for authors and tags.