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.

Sure, I'd be happy to help you with your database design for blog management in PostgreSQL.

To start with, we need to identify the main entities in the blog management system. Typically, a blog management system would have entities like users, posts, comments, tags, categories, and so on. Let's consider each of these entities in turn and design a schema for them.

  1. Users:

The users entity represents the users who can create and manage blog posts. The schema for this entity could be as follows:

CREATE TABLE users (
user_id SERIAL PRIMARY KEY,
username VARCHAR(50) UNIQUE NOT NULL,
email VARCHAR(100) UNIQUE NOT NULL,
password VARCHAR(255) NOT NULL,
created_at TIMESTAMP DEFAULT NOW()
);

CREATE TABLE users (
user_id SERIAL PRIMARY KEY,
-- add first, middle, and last name
first_name VARCHAR(50) NULL DEFAULT NULL, 
middle_name VARCHAR(50) NULL DEFAULT NULL,
last_name VARCHAR(50) NULL DEFAULT NULL,
-- mobile phone used for login purpose
mobile VARCHAR(20) UNIQUE NOT NULL,
password VARCHAR(255) NOT NULL,
email VARCHAR(100) UNIQUE NOT NULL,
-- a short intro about the user
intro VARCHAR(255) NULL DEFAULT NULL,
last_login DATETIME NULL DEFAULT NULL,
registered_at TIMESTAMP DEFAULT NOW()
);
  1. Posts:

The posts entity represents the blog posts that users can create and publish. The schema for this entity could be as follows:

CREATE TABLE posts (
post_id SERIAL PRIMARY KEY,
user_id INTEGER NOT NULL,
title VARCHAR(255) NOT NULL,
content TEXT NOT NULL,
created_at TIMESTAMP DEFAULT NOW(),
published_at TIMESTAMP
);

Here, we have defined a posts table with columns for post_id (a unique identifier for each post), user_id (the user who created the post), title, content, created_at (the timestamp when the post was created), and published_at (the timestamp when the post was published).

  1. Comments:

The comments entity represents the comments that users can leave on blog posts. The schema for this entity could be as follows:

CREATE TABLE comments ( comment_id SERIAL PRIMARY KEY, user_id INTEGER NOT NULL, post_id INTEGER NOT NULL, content TEXT NOT NULL, created_at TIMESTAMP DEFAULT NOW() );

Here, we have defined a comments table with columns for comment_id (a unique identifier for each comment), user_id (the user who created the comment), post_id (the post on which the comment was made), content, and created_at (the timestamp when the comment was created).

  1. Tags:

The tags entity represents the tags that can be associated with blog posts. The schema for this entity could be as follows:

CREATE TABLE tags (
tag_id SERIAL PRIMARY KEY,
name VARCHAR(50) UNIQUE NOT NULL
);

Here, we have defined a tags table with columns for tag_id (a unique identifier for each tag) and name (the name of the tag).

  1. Post_Tags:

The Post_Tags entity represents the relationship between posts and tags. A post can have multiple tags, and a tag can be associated with multiple posts. The schema for this entity could be as follows:

CREATE TABLE post_tags (
post_id INTEGER NOT NULL,
tag_id INTEGER NOT NULL,
PRIMARY KEY (post_id, tag_id),
FOREIGN KEY (post_id) REFERENCES posts (post_id) ON DELETE CASCADE,
FOREIGN KEY (tag_id) REFERENCES tags (tag_id) ON DELETE CASCADE
);

Here, we have defined a post_tags table with columns for post_id and tag_id, both of which are foreign keys referencing the posts and tags tables, respectively. The primary key is a composite key of both columns, to ensure that each post-tag combination is unique. We have also added ON DELETE CASCADE to ensure that when a post or tag is deleted, any associated post_tag records are also deleted.

  1. Categories:
CREATE TABLE categories (
category_id SERIAL PRIMARY KEY,
name VARCHAR(50) UNIQUE NOT NULL
);

Here, we have defined a categories table with columns for category_id (a unique identifier for each category) and name (the name of the category).

  1. Post_Categories:

The Post_Categories entity represents the relationship between posts and categories. A post can have multiple categories, and a category can be associated with multiple posts. The schema for this entity could be as follows:

CREATE TABLE post_categories (
post_id INTEGER NOT NULL,
category_id INTEGER NOT NULL,
PRIMARY KEY (post_id, category_id),
FOREIGN KEY (post_id) REFERENCES posts (post_id) ON DELETE CASCADE,
FOREIGN KEY (category_id) REFERENCES categories (category_id) ON DELETE CASCADE
);

Here, we have defined a post_categories table with columns for post_id and category_id, both of which are foreign keys referencing the posts and categories tables, respectively. The primary key is a composite key of both columns, to ensure that each post-category combination is unique. We have also added ON DELETE CASCADE to ensure that when a post or category is deleted, any associated post_category records are also deleted.

With these tables and relationships defined, you should be able to manage blog posts, comments, tags, and categories effectively in your PostgreSQL database. Of course, the exact design of your schema may depend on your specific requirements, so you may need to modify it accordingly.

Here, we have defined a posts table with columns for post_id (a unique identifier for each post), user_id (the user who created the post), title, content, created_at (the timestamp when the post was created), and published_at (the timestamp when the post was published).