where is laravel model

Laravel is a popular PHP web application development framework that adopts the Model-View-Controller (MVC) design pattern, which makes it very popular in the field of PHP development. In Laravel, the Model is one of the core components that handles all persistent data. It provides an interface to access and interact with the database. This article will take an in-depth look at the Laravel Model and its place in the framework.

1. Laravel Model Overview

Model is the object model in the MVC design pattern, which usually represents the data in the application. In Laravel, Model is the core component related to the database. It accesses the database through Eloquent ORM and handles all persistent data in the application. Eloquent ORM provides a simple and powerful interface that allows us to access the database through Model.

Model is not just an object with properties and methods to pass data, it also contains the business logic for processing the data, allowing us to easily separate business logic from our database operations.

2. Laravel Model Location

In Laravel, Model is mainly located in the Models subdirectory under the app directory. If you do not use the --no-model option when creating a Laravel project, Laravel will automatically generate a User model file in this directory. We can add or modify other model files in this directory according to our needs.

In a standard Laravel installation, all Model files can usually be found in the app/Models directory. This directory can be changed according to personal preference, but before changing the directory, you need to update the users.provider value in the config/auth.php file, which needs to match this directory.

You can create a new model through the following command:

php artisan make:model ModelName

This command will create a new model file with the specified name, which will be located in the app/Models directory.

In addition to specifying the name of the model, we can also quickly create a model with predefined properties and methods by using some shortcut options:

php artisan make:model ModelName --migration

This command will not only generate a new model file, a database migration file is also automatically generated for the model so that it can interact with the database.

php artisan make:model ModelName --controller

This command will generate a new model file with the specified name and a controller. Controllers will be used with this model so that we can manage the data more easily.

3. Laravel Model creation and usage examples

Creating a new Model in Laravel is very simple. You can create a new model file by using the php artisan make:model ModelName command. The model file contains many methods and properties for handling database operations.

For example, to create a Model named "Product" in Laravel, you can use the following command to create it:

php artisan make:model Product

This will create a new Model file in the app/Models directory, named for Product.php.

Next, we can open the created model file and add some properties and methods. For example, we can add "name" and "price" properties to the model using the following code:

<?php

namespace AppModels;

use IlluminateDatabaseEloquentFactoriesHasFactory;
use IlluminateDatabaseEloquentModel;

class Product extends Model
{
    use HasFactory;

    protected $fillable = [
        'name',
        'price',
    ];
}

In this example, we have added two properties to the Product model, namely "name" and "price" . These properties are defined in the $fillable array, which means we can fill these fields when creating or updating a record.

In addition to properties, we can also add other methods to the model. In this example, we use the HasFactory trait to add a factory method that can be used to create new records for our model.

With this new Model, we can get a record from the database with the following code:

$product = Product::find(1);

In this example, we use the find method to find the Product with id 1. We can also use other Eloquent ORM query methods to find and filter records.

Finally, we can add a new record to the Product model using the following code:

$product = Product::create([
    'name' => 'Example Product',
    'price' => 19.99,
]);

In this example, we added a new record to the Product model using the create method, this method The fields we define in the $fillable attribute will be automatically processed.

4. Summary

Laravel Model is an important component in the framework, which allows us to easily interact with the database and handle all persistent data in the application. In Laravel, Models are usually located in the app/Models directory and provide many powerful query and manipulation methods through the Eloquent ORM. Using Model, we can easily separate business logic from database operations, which makes our code more modular and easier to maintain.

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