Gate vs Policy in Laravel: Key Differences and When to Use Each

In Laravel, Gates are simple, closure-based authorization checks for specific actions, while Policies are classes that organize authorization logic around a model. Gates are best for simple or global checks, whereas Policies provide a structured way to handle complex model-related permissions.

Quick Comparison

This table summarizes the main differences between Laravel Gates and Policies.

Factor	Gate	Policy
Definition	Closure-based authorization checks	Class-based authorization tied to models
Use Case	Simple or global permissions	Model-specific permissions
Organization	Defined in AuthServiceProvider	Separate classes per model
Complexity	Best for simple checks	Handles multiple related actions
Reusability	Less reusable, inline logic	Reusable methods per model
Automatic Binding	No automatic model binding	Automatically resolves model instances

Key Differences

Gates in Laravel are simple, closure-based functions defined in the AuthServiceProvider. They are ideal for quick authorization checks that are not tied to any specific model, such as checking if a user can access an admin dashboard.

On the other hand, Policies are dedicated classes that group authorization logic around a particular model. Each method in a policy corresponds to an action like view, update, or delete. This structure helps keep authorization organized and maintainable, especially when dealing with complex permissions related to models.

Another key difference is that Policies automatically receive the model instance when called, making it easier to check permissions based on the model's data. Gates require you to manually pass any relevant data. Policies also support automatic registration and can be used with Laravel's resource controllers seamlessly.

Code Comparison

Here is how you define a Gate to check if a user can update a post.

php

use Illuminate\Support\Facades\Gate;

Gate::define('update-post', function ($user, $post) {
    return $user->id === $post->user_id;
});

// Usage example
if (Gate::allows('update-post', $post)) {
    // The user can update the post
}

Output

No direct output; returns true if user owns the post, false otherwise.

Policy Equivalent

Here is how you create a Policy class for the Post model with an update method.

php

<?php

namespace App\Policies;

use App\Models\Post;
use App\Models\User;

class PostPolicy
{
    public function update(User $user, Post $post)
    {
        return $user->id === $post->user_id;
    }
}

// Register policy in AuthServiceProvider:
// protected $policies = [
//     Post::class => PostPolicy::class,
// ];

// Usage example
if (auth()->user()->can('update', $post)) {
    // The user can update the post
}

Output

No direct output; returns true if user owns the post, false otherwise.

When to Use Which

Choose Gates when you need quick, simple authorization checks that are not related to a specific model, such as checking user roles or global permissions.

Choose Policies when your authorization logic revolves around a model and you want to keep your code organized, reusable, and easy to maintain. Policies are especially useful for applications with many model-related permissions.

Key Takeaways

Gates are simple closures for quick, global authorization checks.

Policies are classes organizing authorization logic around models.

Use Gates for simple or non-model-specific permissions.

Use Policies for complex, model-related authorization.

Policies automatically receive model instances and integrate well with Laravel features.