Validation on Nalar

Data Validation in Laravel: A Complete Developer Guide

Thu, 22 Aug 2024 00:00:00 +0700

Validation is an important boundary in web applications. It ensures incoming data has the shape and constraints your application expects before that data reaches business logic or persistence. Laravel provides several validation APIs, from quick controller validation to reusable Form Request classes and custom rules.

1. Basic Validation

For small request handlers, call validate() on the request:

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use Illuminate\Http\Request;

public function store(Request $request)
{
    $validatedData = $request->validate([
        'name' => ['required', 'string', 'max:255'],
        'email' => ['required', 'email', 'unique:users,email'],
        'password' => ['required', 'string', 'min:8', 'confirmed'],
    ]);

    // Use $validatedData rather than the entire request payload.
}

For a normal browser request, Laravel redirects back with validation errors in the session. For requests expecting JSON, Laravel returns a validation error response, normally with HTTP status 422.

Implement Validation in a Go Web App with Gin

Tue, 28 Nov 2023 00:00:00 +0700

Input validation is an important part of any web application. It lets the server reject malformed or incomplete data before business logic runs.

This tutorial builds a small API with Gin and uses go-playground/validator for declarative validation rules.

Project Structure

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project/
├── main.go
└── utils/
    └── validation.go

1. Create the Gin Application

Create main.go with a /register endpoint:

Validate User Input in a Go Web App with Gin

Tue, 28 Nov 2023 00:00:00 +0700

Input validation is one of the first defenses a web application has against malformed, incomplete, or unexpected data. Validation should run before business logic writes data to a database or triggers other side effects.

This example uses Gin with go-playground/validator to validate a simple registration request.

Project Structure

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project/
├── main.go
└── utils/
    └── validation.go

1. Set Up Gin

Create main.go: