How can you handle form validation in Ruby on Rails? Discuss the available validation techniques.

In Ruby on Rails, form validation is an essential part of ensuring that the data submitted by users is valid and meets the specified requirements. Rails provides several techniques and tools to handle form validation effectively. Let's discuss some of the available validation techniques in Ruby on Rails: 1. Active Record Validations: Active Record, the ORM in Rails, includes a wide range of validation helpers that you can use to validate the attributes of your models. These helpers allow you to specify various validation rules such as presence, length, numericality, format, and more. By adding these validation rules to your model classes, Rails automatically performs the validation when you attempt to save the data to the database. If any of the validations fail, Rails adds error messages to the corresponding attributes, which can be displayed to the user. Example: ``` ruby`class User < ApplicationRecord validates :name, presence: true validates :email, presence: true, uniqueness: true validates :password, length: { minimum: 6 } end` ``` 2. Custom Validations: ....