Tukukkk

I'm making an app using Rails. I have 4 boolean columns in a table like below, and I want to show a message if that column is true.

class CreatePosts < ActiveRecord::Migration[5.2]

  def change

    create_table :posts do |t|

      t.integer :user_id, null: false, default: 0

      t.string :title, null: false, default: ''

      t.text :description, null: true

      t.boolean :tag_1, null: false, default: false

      t.boolean :tag_2, null: false, default: false

      t.boolean :tag_3, null: false, default: false

      t.boolean :tag_4, null: false, default: false



      t.timestamps

    end

  end

posts_controller.rb

def index

  @posts = Post.all

end

index.html.erb

<% @posts.each do |post| %>

  <ul>

    <% if post.tag_1 %>

      <li><%= 'tag_name_A' %></li>

    <% end %>

    <% if post.tag_2 %>

      <li><%= 'tag_name_B' %></li>

    <% end %>

    <% if post.tag_3 %>

      <li><%= 'tag_name_C' %></li>

    <% end %>

    <% if post.tag_4 %>

      <li><%= 'tag_name_D' %></li>

    <% end %>

    <% if !post.tag_1 && !post.tag_2 && !post.tag_3 && !post.tag_4 %>

      <li>none</li>

    <% end %>

  </ul>

<% end %>

So 'tag_name_A' will be shown if tag_1 is the only true column, and there'll be 'tag_name_B' & 'tag_name_D' shown if tag_2 and tag_4 are both true. (I hope I'm making myself clear.)

These codes are working fine and I'm already getting what I want, but I just don't like how they are written. It looks messy and obviously not smart. (You can tell that I'm a newbie.) How would you optimize them?