What Are Filters?

What Are Filters in Ruby on Rails?

Filters in Ruby on Rails are methods that are executed before, after, or around a controller action. They allow you to perform common tasks across multiple actions in a controller, such as authentication, authorization, logging, or setting up data for the view.

Filters are defined using the following methods in a controller:

• before_action: Executes the specified filter method before the action is executed.
• after_action: Executes the specified filter method after the action is executed.
• around_action: Executes the specified filter method around the action, allowing you to perform tasks before and after the action is executed.

Here's an example of how to use filters in a controller:

class PostsController < ApplicationController
  before_action :authenticate_user!, only: [:new, :create, :edit, :update, :destroy]
  before_action :set_post, only: [:show, :edit, :update, :destroy]

  def index
    @posts = Post.all
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