What is Laravel's ORM?

Laravel's ORM is an elegant interface called Eloquent, which uses objects to represent database tables and data, simplifying interaction with the database. It includes: Type safety: ensuring the data types of model attributes. Relational processing: Easily define relationships between database tables. Query Builder: Build complex and efficient queries. Lazy loading: Load data on demand to optimize performance. Events and listeners: Register events and listeners to implement customized behavior.

Laravel ORM: Eloquent

What is Laravel ORM?

Laravel Object Relational Mapping (ORM) called Eloquent is a simple and elegant interface for operating databases. ORM simplifies interaction with the database by enabling you to use objects to represent database tables and data.

How Eloquent works

Eloquent uses PHP classes to map database tables. Each model class represents a database table, and the properties of the model class correspond to the columns in the table. Eloquent uses magic methods and dynamic property accessors to automatically handle data operations such as get, set, update, and delete.

Advantages of Eloquent

• Type safety: Eloquent enforces the data type of model attributes to ensure data integrity and reliability .
• Relationship processing: Eloquent provides a concise way to define and manage relationships between database tables, such as "one-to-one", "one-to-many" and "many-to-many" .
• Query Builder: Eloquent provides a powerful query builder that allows you to build complex and efficient database queries.
• Lazy loading: Eloquent only loads data when needed, optimizing performance and reducing memory usage.
• Events and listeners: Eloquent allows you to register events and listeners when model events (such as save, update, delete) occur, thereby achieving customized behavior.

Using Eloquent

To use Eloquent, you first need to create a model class that will extend Illuminate\Database\Eloquent\Model kind. You can then use the Fluent API to perform query and update operations on the model instance. For example:

// 获取所有用户
$users = User::all();

// 获取第一个用户
$user = User::first();

// 创建新用户
$newUser = new User(['name' => 'John Doe']);
$newUser->save();

Eloquent enables Laravel developers to easily manage databases, greatly simplifying the development process.

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