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Laravel Database

Laravel provides an easy-to-use database abstraction layer that allows developers to interact with databases using PHP code. In this article, we'll explore the Laravel database and how to use it to create, read, update, and delete records in a database.

Connecting to a Database

Before we can start working with a database in Laravel, we need to connect to it. Laravel's database configuration file is located at config/database.php. We can define the connection details for the database in this file. Once we've defined the connection details, we can use them to connect to the database.

Syntax

'connections' => [
    'mysql' => [
        'driver' => 'mysql',
        'host' => env('DB_HOST', '127.0.0.1'),
        'port' => env('DB_PORT', '3306'),
        'database' => env('DB_DATABASE', 'forge'),
        'username' => env('DB_USERNAME', 'forge'),
        'password' => env('DB_PASSWORD', ''),
        'charset' => 'utf8mb4',
        'collation' => 'utf8mb4_unicode_ci',
        'prefix' => '',
        'strict' => true,
        'engine' => null,
    ],
],

Example

DB::connection()->getMongoClient()->selectDatabase('database_name');

Output

This code connects to the database and selects a database named database_name.

Explanation

Laravel provides an easy-to-use database abstraction layer that allows us to interact with databases using PHP code. We can define the connection details for the database in the config/database.php file. Once we've defined the connection details, we can use them to connect to the database.

Use

Connecting to a database is the first step in working with databases in Laravel. We need to connect to the database before we can create, read, update, or delete records in it.

Important Points

  • Laravel's database configuration file is located at config/database.php.
  • We can define the connection details for the database in this file.
  • Once we've defined the connection details, we can use them to connect to the database.

Query Builder

Laravel provides a query builder that allows us to build SQL queries using PHP code. The query builder makes it easy to write complex SQL queries in an easy-to-read syntax. We can use the query builder to create, read, update, and delete records in a database.

Syntax

DB::table('table_name')->select('column1', 'column2')->where('column1', '=', 'value')->get();

Example

DB::table('users')->select('name')->where('id', '=', 1)->get();

Output

This code selects the name of the user with an ID of 1 from the users table.

Explanation

The query builder is an easy-to-use tool that allows us to build SQL queries using PHP code. We start by calling the table method, which specifies the name of the table we want to query. We can then chain other methods to the query builder to specify the columns we want to select, the conditions we want to use to filter the results, and any other options we want to use.

Use

The query builder is a powerful tool that allows us to build complex SQL queries using an easy-to-read syntax. We can use the query builder to create, read, update, and delete records in a database.

Important Points

  • Laravel provides a query builder that allows us to build SQL queries using PHP code.
  • The query builder makes it easy to write complex SQL queries in an easy-to-read syntax.
  • We can use the query builder to create, read, update, and delete records in a database.

Eloquent ORM

Laravel's Eloquent ORM (Object-Relational Mapping) is a powerful tool that allows us to work with databases using object-oriented code. Eloquent provides an easy-to-use API for interacting with databases, allowing us to create, read, update, and delete records using a simple and intuitive syntax.

Syntax

class User extends Model
{
    //
}

Example

$user = new User;
$user->name = 'John Doe';
$user->email = 'johndoe@example.com';
$user->save();

Output

This code creates a new user record in the database with a name of 'John Doe' and an email of johndoe@example.com.

Explanation

Eloquent is an object-relational mapping (ORM) tool that allows us to work with databases using object-oriented code. We start by creating a model class that extends the Illuminate\Database\Eloquent\Model class. We can then use the model class to interact with the database. We create a new instance of the model, set the properties of the instance, and call the save method to save the record to the database.

Use

Eloquent is a powerful tool that allows us to work with databases using object-oriented code. We can use Eloquent to create, read, update, and delete records in a database using a simple and intuitive syntax.

Important Points

  • Eloquent is an object-relational mapping (ORM) tool that allows us to work with databases using object-oriented code.
  • We start by creating a model class that extends the Illuminate\Database\Eloquent\Model class.
  • We can then use the model class to interact with the database.

Summary

In this article, we explored the basics of the Laravel database and how to use it to create, read, update, and delete records in a database. We covered connecting to a database, using the query builder, and using Eloquent ORM. Laravel provides powerful tools for working with databases, making it easy to build robust web applications.

Migration CommandsEloquent
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