How to Implement Form Validation in Rails Application

How to Implement Form Validation in Rails Application

27 Apr 2021
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How to Implement Form Validation in Rails Application

What is validation?

Validation is used to ensure that only accurate data is stored in the database. These database-agnostic cannot be avoided by the end-users and are very convenient to test and maintain.

 

What is form validation?

Form validation is a technical method in which a web form validates and checks whether the information provided by a user is accurate or not. If the data provided by the user is correct according to the input format only then the user can continue with the process, otherwise, the user is required to fix the mistake to proceed.

 

Why form validation is necessary?

Form validation is essential to prevent any web form abuse by a malicious user. Improper validation of form data is one of the principal reasons for security vulnerabilities.

 

Let's explore how to implement form validation in rails application:

  1. Create rails application and database.
  2. Generate model and controller with a method name.
  3. Establish the root in routes
  4. Design a form in view
  5. Write a code to perform crud operation in the controller
  6. Write a validation for fields mentioned in the form in the model.
    In the above mentioned screenshot, we can view the applied validation for name, email, and contact fields with their uniqueness, message and input format.
  7. Start the server using the Rails server command and display the output on the browser.




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