Validate method on request in Laravel - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the validate method do in a Laravel request?

It checks the incoming request data against defined rules and automatically redirects back with errors if validation fails.

beginner

How do you use the validate method inside a controller method?

Call $request->validate([ 'field' => 'rules' ]) to check fields. If validation passes, the code continues; if not, errors are sent back.

beginner

What happens if validation fails when using $request->validate()?

Laravel automatically redirects the user back to the previous page with error messages and old input data.

intermediate

Can you customize error messages when using the validate method?

Yes, by passing a second array argument with custom messages like $request->validate([...], ['field.rule' => 'Custom message']).

beginner

What types of validation rules can you use with the validate method?

You can use rules like required, email, max:255, unique, and many more built-in or custom rules.

What does $request->validate() return if validation passes?

A Redirect to another page

B An error message

C The validated data as an array

D Nothing, it stops execution

The method returns the validated data so you can use it safely.

Where does Laravel redirect if validation fails using validate()?

A To the login page

B To the homepage

C To a custom error page

D Back to the previous page

Laravel sends the user back to the form page with error messages.

How do you specify multiple validation rules for a single field?

A Use a pipe symbol '|' between rules

B Use an array of rules

C Separate rules with commas in a string

D Write rules in separate <code>validate</code> calls

Rules are separated by pipes like 'required|email|max:255'.

Can you use the validate method outside controllers?

A No, only in controllers

B Yes, anywhere you have a request object

C Only in middleware

D Only in routes

As long as you have the request object, you can call validate.

What is the purpose of custom error messages in validation?

A To provide user-friendly feedback

B To change the validation rules

C To skip validation

D To log errors silently

Custom messages help users understand what went wrong in simple words.

Explain how the validate method works in a Laravel request and what happens when validation fails.

Think about what happens inside a form submission.

Describe how to customize error messages when using the validate method.

Look at the second parameter of the validate method.