# Override Core Model

# Introduction

Bagisto utilizes Concord, a Laravel extension, for building modules on top of Laravel's built-in service providers. Concord introduces the concept of model proxies, which allow you to override and extend core models in a modular way.

Concord requires the existence of an interface, such as Product, which serves as a contract that can be bound to a concrete class using Concord's registerModel() method.

By default, the Models\Product class is bound to the Contracts\Product interface within the module. If you want to extend or override this class, you can use Concord's registerModel() method.

The registerModel() method handles the binding of the interface and implementation in Laravel's service container, enabling you to easily type-hint the interface for automatic injection.

For more details, you can visit the Concord GitHub repository (opens new window) or refer to the Concord documentation (opens new window).

# Overriding a Model Class

To override a core model in Bagisto using Concord, follow these steps:

# Define an Interface (Contract)

In Bagisto's modular structure, each Eloquent model typically corresponds to an interface. This interface acts as a contract that specifies the methods the model must implement.

# Register the Model Override

Use Concord's registerModel() method in your module's service provider (ServiceProvider) to bind your custom model implementation to the interface. Here’s how you can do it:

<?php

namespace Webkul\Blog\Providers;

use Illuminate\Support\ServiceProvider;

class BlogServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        //...
        
        $this->app->concord->registerModel(
            \Webkul\Product\Contracts\Product::class, \App\Http\Product::class
        );
    }
}
  • Replace \Webkul\Product\Contracts\Product::class with the interface you wish to override.
  • Replace \App\Http\Product::class with the path to your custom model class that extends the core model you are overriding.

# Implement the Custom Model Class

Your custom model class (Product in this example) should extend the base core model (ProductBaseModel), ensuring it adheres to the contract specified by the interface. Here’s an example:

<?php

namespace App\Http;

use Webkul\Product\Models\Product as ProductBaseModel;

class Product extends ProductBaseModel
{
    //
}

Once registered, you can use dependency injection or other Laravel mechanisms to reference the interface(\Webkul\Product\Contracts\Product::class) throughout your application. Laravel's service container will automatically resolve your custom model implementation (\App\Http\Product::class) where the interface is referenced.

By following this approach, you can effectively extend and override core models within Bagisto using Concord, maintaining modularity and flexibility in your application's architecture.

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