Eloquent Global Scopes with applying to all queries

TL;DR Eloquent Global Scopes in Laravel allow global filtering or modification of queries without manual application. They can be thought of as filters that attach themselves to a model, enforcing rules across all database interactions. By adding a $globalScopes property to your model's constructor, you can automatically apply these scopes to every query.

Mastering Eloquent Global Scopes in Laravel: Applying to All Queries

As a Fullstack Developer, you're likely no stranger to optimizing your database queries for better performance and efficiency. In Laravel, one of the most powerful features to achieve this is through Eloquent Global Scopes.

In this article, we'll delve into the world of Eloquent Global Scopes, exploring what they are, how to apply them to all queries, and provide practical examples to demonstrate their power.

What are Eloquent Global Scopes?

Eloquent Global Scopes were introduced in Laravel 5.3 as a way to globally filter or modify Eloquent queries without having to manually apply the same conditions to every query. These scopes can be thought of as "filters" that attach themselves to a model, enabling you to enforce certain rules across all database interactions.

Creating and Applying Global Scopes

To create an Eloquent Global Scope, you'll need to define a method within your model that will handle the filtering or modification logic. This method should be named with a prefix of globalScope, followed by the name of the scope.

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Builder;

class User extends Model
{
    public function scopeGlobalActive(Builder $builder)
    {
        return $builder->where('is_active', 1);
    }
}

Once you've defined your Global Scope, you can apply it to all queries by calling the withGlobalScope method on the model:

User::withGlobalScope('global_active', function ($model) {
    // logic for globalActive scope
})->get();

However, there's a catch! This approach requires you to manually specify the Global Scope every time you want to apply it. What if we wanted to apply this scope globally, without having to remember (or write) this line of code every time?

Applying Global Scopes to All Queries

Here lies the power of Eloquent Global Scopes. By adding a global parameter to your model's constructor, you can automatically apply the Global Scope to all queries:

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Builder;

class User extends Model
{
    protected $globalScopes = [
        'global_active' => 'globalActive',
    ];

    // ... rest of your model code ...
}

With this configuration, any time you query the User model, the globalActive scope will be automatically applied!

Multiple Global Scopes and Custom Logic

You can define multiple Global Scopes within a single model. When applying these scopes globally, Laravel will combine their conditions using logical ANDs.

If you need more complex logic within your Global Scope, consider using a closure to define the filtering criteria:

public function scopeGlobalActive(Builder $builder)
{
    return $builder->where('is_active', 1)->where('email_verified_at', '!=', null);
}

Conclusion

Eloquent Global Scopes are a powerful tool for streamlining and optimizing your database queries in Laravel. By applying these scopes globally, you can enforce consistent conditions across all model interactions.

Remember to utilize the $globalScopes property within your models to automatically apply these scopes to every query. With practice, you'll become proficient in crafting elegant solutions with Eloquent Global Scopes!

Now that you've mastered this crucial aspect of Laravel development, feel free to experiment and extend the capabilities of Eloquent Global Scopes!