> Full Neon documentation index: https://neon.com/docs/llms.txt

# An Overview of Laravel and Postgres on Neon

Learn how to integrate Laravel with Postgres on Neon, using Laravel's Eloquent ORM and migrations for database management.

Combining [Laravel](https://laravel.com/), an expressive PHP framework, with Neon, the AI-native backend platform for apps and agents that spans a Postgres database, Auth, Storage, Functions, and an AI Gateway, gives developers a complete toolset for web development.

Laravel supports Postgres natively. Its database-agnostic [migrations](https://laravel.com/docs/11.x/migrations) and [Eloquent ORM](https://laravel.com/docs/11.x/eloquent), which maps application objects to database tables, work with Lakebase Postgres without changes.

## Create a Neon project

If you do not have one already, create a Neon project. Save your connection details including your password. They are required when defining connection settings.

1. Navigate to the [Projects](https://console.neon.tech/app/projects) page in the Neon Console.
2. Click **New Project**.
3. Specify your project settings and click **Create Project**.

## Setting Up Your Environment for Laravel and Neon

Start by installing Laravel. For installation instructions, refer to the [Laravel documentation](https://laravel.com/docs/11.x/installation).

To get Laravel working with your database on Neon, you'll need to configure your environment settings.

This process involves updating the `.env` file in your Laravel project to include the details for your database connection.

Here's what you need to update in the `.env` file:

```env
DB_CONNECTION=pgsql
DB_HOST=your-neon-hostname.neon.tech
DB_PORT=5432
DB_DATABASE=<your-database-name>
DB_USERNAME=<your-username>
DB_PASSWORD=<your-password>
```

- `DB_CONNECTION`: This tells Laravel that you're using a PostgreSQL database.
- `DB_HOST`: Here, you'll put the address of your Neon database.
- `DB_PORT`: This is the port number for PostgreSQL, which is usually 5432.
- `DB_DATABASE`: The name of your database on Neon.
- `DB_USERNAME` and `DB_PASSWORD`: Your login credentials for the Neon database.

With these settings, Laravel can connect to your Lakebase Postgres database, allowing your application to interact with it.

## Using Eloquent and Migrations in Laravel

Laravel's migration system and Eloquent ORM simplify database management and interaction.

When you use Eloquent with Lakebase Postgres, it allows you to handle database operations without writing any SQL queries directly, thanks to Laravel's expressive syntax. Along with the Laravel migration system, you can easily manage your database schema and perform operations like creating tables, defining relationships, and querying data.

### Database Migrations and Schema Management

Laravel's migration system is an essential tool for database schema management. Migrations ensure that your database structure is properly version-controlled.

To create a new migration in Laravel, you use the `make:migration` Artisan command:

```bash
php artisan make:migration create_books_table --create=books
```

This will create a new migration file in the `database/migrations` directory. In this file, you define the schema for the `books` table:

```php
Schema::create('books', function (Blueprint $table) {
    $table->id();
    $table->string('title');
    $table->unsignedBigInteger('author_id');
    $table->year('publication_year');
    $table->timestamps();
});
```

Once you've defined the schema, you can run the migration to create the table in your Lakebase Postgres database:

```bash
php artisan migrate
```

This will execute the migration and create the `books` table in your database and keep track of the migration history.

### Defining Models in Laravel

First, you define a model that represents a table in your database. Each model corresponds to a table and allows you to interact with the table's records. For example, to create a `Book` model, you would create a `Book.php` file in the `app/Models` directory or run the following Artisan command:

```bash
php artisan make:model Book
```

The command will create a `Book.php` file in the `app/Models` directory.

In the model file, you can define details about the table and its columns:

```php
<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Book extends Model
{
    protected $fillable = ['title', 'author', 'publication_year'];
}
```

The `fillable` array in the model protects your application from mass-assignment vulnerabilities by specifying which attributes should be assignable.

In the model, you can also define relationships with other models, set up mutators and accessors, and perform various database operations.

### Creating and Saving Records

With the model set up, you can create and save new records to your database using Eloquent.

In your controller or wherever you need to create a new record, you can instantiate the model, set its properties, and save it:

```php
$book = new Book;
$book->title = 'Sample Book';
$book->author_id = 1;
$book->publication_year = 2021;
$book->save();
```

This creates a new instance of the `Book` model, sets its properties (`title`, `author_id`, `publication_year`), and then saves the new record to the `books` table in your Lakebase Postgres database.

Using Eloquent, you can manage your database records with simple, expressive syntax, making your code cleaner and more maintainable.

## Using Queries Efficiently

When building an application, it's important to write efficient queries. The same is true when working with Laravel and Postgres.

Laravel's Eloquent ORM has features like relationships and eager loading that help you write better queries.

For example, if you're fetching authors and their books, instead of making a separate database query for each author's books (which can slow things down), you can use eager loading.

Let's say you have an `Author` model with a `books` relationship:

```php
<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Author extends Model
{
    use HasFactory;

    protected $fillable = ['name', 'email', 'biography'];

    public function books()
    {
        return $this->hasMany(Book::class);
    }
}
```

With this relationship defined, you can use eager loading to fetch authors and their books in a more efficient way:

```php
$authors = Author::with('books')->get();
```

This code fetches all authors and their associated books, reducing the number of queries made to the database.

## Postgres specific features in Laravel

Using Postgres's advanced features within your Laravel application can improve performance, protect data integrity, and give you flexible data storage options.

### Using Indexes

Indexes are a core part of database optimization, especially with large datasets. They work by creating a data structure that allows the database engine to quickly locate and retrieve the data without scanning the entire table.

For instance, if your application includes a feature that allows users to search for books by their titles, querying a large database without an index can be time-consuming. By indexing the `title` column, you significantly improve query performance:

```php
Schema::table('books', function (Blueprint $table) {
    $table->index('title');
});
```

After adding the index, queries that search for books by title, like the one below, become much more efficient, reducing the response time for your users:

```php
$books = Book::where('title', 'like', '%search-term%')->paginate(10);
```

### Ensuring Data Integrity with Foreign Key Constraints

Foreign key constraints maintain referential integrity between tables. They ensure that relationships between tables remain consistent, preventing orphaned records and ensuring data accuracy.

In the context of a book application, where each book is linked to an author, defining a foreign key constraint ensures that every book in your database is tied to an existing author. Here's how you can define such a constraint in a Laravel migration:

```php
Schema::table('books', function (Blueprint $table) {
    $table->foreign('author_id')->references('id')->on('authors')->onDelete('cascade');
});
```

By using the `foreign()` method, you can ensure that when an author is deleted, all their books are also removed from the database, preventing orphaned records and maintaining the integrity of your data.

### Using JSONB for Flexible Data Storage

Postgres's JSONB data type lets you store and query JSON data in a column. Unlike the standard JSON data type, JSONB stores data in a decomposed binary format, allowing for efficient querying.

Imagine you want to store various metadata about each book, such as tags, reviews, or custom attributes. The JSONB data type allows you to store this information in a structured, queryable format:

```php
Schema::table('books', function (Blueprint $table) {
    $table->jsonb('metadata')->nullable();
});
```

With this `metadata` column, you can easily store and retrieve structured data related to each book, making your application more flexible and adaptable to changing requirements.

By integrating these Postgres features into your Laravel application, you can enhance its performance, maintain data integrity, and provide a scalable solution for managing complex data structures.

## Testing and database branches on Neon

When integrating your database on Neon with your Laravel application, using database branches for testing keeps your tests reliable and consistent.

Database branches on Neon allow you to create isolated database environments, similar to branching in version control systems like Git. By using a separate database branch for testing, you ensure that your test executions are isolated from your production data, maintaining data integrity and consistency.

Usually, when running tests in Laravel, you would use a separate database for testing to avoid affecting your production data. In most cases, developers use an in-memory SQLite database for testing. However, database branches on Neon offer a more solid solution for testing your Laravel application.

1. Neon lets you create branches of your database. This means you can have a dedicated branch just for testing purposes, where you can freely run tests, apply migrations, and modify data without affecting your production database.

2. With a testing branch, you can execute your entire suite of tests in an environment that mirrors production without the risk of corrupting your actual production data. This is particularly useful for integration tests that interact with the database.

3. Configuring your Laravel application to use a separate database branch for testing is straightforward. You adjust your testing environment configuration to point to the testing branch of your Lakebase Postgres database, ensuring that when Laravel runs tests, it uses this isolated database instance.

## Conclusion

Combining Laravel with Postgres on Neon gives you an efficient environment for developing web applications. Laravel's Postgres support lets you use the full feature set of both the framework and the database.

The ability to use database branches for testing on Neon adds isolated testing environments to your development process that mirror your production setup without risking data integrity.

Laravel's expressive syntax combined with Lakebase Postgres lets developers build complex, data-driven applications efficiently.

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