README

A 100% safe, atomic, collision-free ID generator for Laravel.

This package generates human-readable sequential IDs such as:

Invoice numbers
Booking IDs
Order numbers
Membership numbers

Designed to work safely under high concurrency without race conditions.

Author

Jahid

Why This Package Exists

Common approaches like MAX(id) + 1 or orderBy()->first() are not safe under concurrent requests and will eventually generate duplicate IDs.

This package solves that problem by:

Using atomic database increments
Ensuring database-level consistency
Supporting date-based sequences

Key Features

✅ Atomic & concurrency-safe
✅ No race conditions
✅ Works with existing data
✅ Daily sequence reset
✅ Supports multiple models & columns
✅ Simple helper function
✅ Laravel 10 / 11 / 12 compatible
✅ MySQL / MariaDB compatible

Installation

Install the package via Composer:

composer require jahid-facts/laravel-id-generator

Database Setup

Run the migration:

php artisan migrate

This creates the id_sequences table which safely stores sequence counters.

Usage

Helper Function

idgen();

Generate Invoice Number

use App\Models\Payment;

static::creating(function ($payment) {
    if (!$payment->invoice_number) {
        $payment->invoice_number = idgen()->daily(
            Payment::class,
            'INV',
            'invoice_number'
        );
    }
});

Output example:

INV-15122025-00001

Generate Booking ID (Based on Booking Date)

use App\Models\Booking;

static::creating(function ($booking) {
    if (!$booking->booking_id) {
        $booking->booking_id = idgen()->daily(
            Booking::class,
            'BK',
            'booking_id',
            $booking->booking_date
        );
    }
});

Output example:

BK-20122025-00002

ID Format

PREFIX-DDMMYYYY-XXXXX

Part	Meaning
PREFIX	ID type (INV, BK, etc.)
DDMMYYYY	Date
XXXXX	Zero-padded sequence

Existing Data (Important)

If your database already contains IDs, you must sync the sequence counters once.

Without syncing, new IDs may start again from 00001 and cause duplicate key errors.

After syncing, the generator will continue from the highest existing value.

Database Safety

Always keep UNIQUE indexes on generated ID columns:

ALTER TABLE payments ADD UNIQUE (invoice_number);
ALTER TABLE bookings ADD UNIQUE (booking_id);

This guarantees database-level protection.

Concurrency Guarantee

This package uses MySQL atomic increments:

LAST_INSERT_ID(counter + 1)

This guarantees:

One request = one unique ID
Safe across multiple PHP workers
Safe across multiple servers

Supported Versions

Component	Version
PHP	8.1+
Laravel	10 / 11 / 12
Database	MySQL / MariaDB

Best Practices

Always pass the correct date (e.g. booking_date)
Keep unique indexes
Sync sequences once for old data
Do not manually edit sequence counters

License

MIT License

Credits

Developed by Jahid

Happy coding 🚀

jahid-facts / laravel-id-generator

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