# Filament v4 + Binary UUID v7 - Edit Route Issue## Context

I'm working with Laravel 12 and Filament 4.x, using binary UUID v7 (16 bytes) as primary keys in

users

users

users

users and

invoices

invoices

invoices

invoices tables. The goal is to store UUIDs in binary format in the database for better performance, but expose them as UUID v7 strings (36 characters) in routes and Filament's interface.

Main Problem

Filament edit routes are generating URLs with malformed UUIDs and returning 404. For example:

Generated URL:
```
https://binaryuuid.test/admin/invoices/30313961-6637-6534-2d63-3933652d3733/edit
```
https://binaryuuid.test/admin/invoices/30313961-6637-6534-2d63-3933652d3733/edit
```
https://binaryuuid.test/admin/invoices/30313961-6637-6534-2d63-3933652d3733/edit
```
https://binaryuuid.test/admin/invoices/30313961-6637-6534-2d63-3933652d3733/edit
Error: 404 Not Found
Expected UUID:
```
019af7e4-c93e-73f9-a5ab-bc6e56c25535
```
019af7e4-c93e-73f9-a5ab-bc6e56c25535
```
019af7e4-c93e-73f9-a5ab-bc6e56c25535
```
019af7e4-c93e-73f9-a5ab-bc6e56c25535

The UUID in the URL appears to be an incorrect hexadecimal encoding of the UUID string.

Current Architecture

Database

```
id
```
```
id
```
columns are
```
binary(16)
```
binary(16)
```
binary(16)
```
binary(16)
to store UUIDs in binary format
Affected tables:
```
users
```
users
```
users
```
users
,
```
invoices
```
invoices
```
invoices
```
invoices
,
```
customer_identities
```
customer_identities
```
customer_identities
```
customer_identities
,
```
invoice_items
```
invoice_items
```
invoice_items
```
invoice_items

### Models

```
HasBinaryUuid
```
HasBinaryUuid
```
HasBinaryUuid
```
HasBinaryUuid
trait that handles conversion between binary and UUID string
Custom
```
BinaryUuid
```
BinaryUuid
```
BinaryUuid
```
BinaryUuid
cast implementing
```
CastsAttributes
```
CastsAttributes
```
CastsAttributes
```
CastsAttributes
Overridden methods:
- ```
getKey()
```
  getKey()
```
getKey()
```
  getKey()
  - returns UUID string
- ```
getRouteKey()
```
  getRouteKey()
```
getRouteKey()
```
  getRouteKey()
  - returns UUID string for routes
- ```
getAuthIdentifier()
```
  getAuthIdentifier()
```
getAuthIdentifier()
```
  getAuthIdentifier()
  - returns binary (16 bytes) for sessions
- ```
resolveRouteBinding()
```
  resolveRouteBinding()
```
resolveRouteBinding()
```
  resolveRouteBinding()
  - converts UUID string to binary for lookups
- ```
getAttributes()
```
  getAttributes()
```
getAttributes()
```
  getAttributes()
  - converts binaries to UUID strings for Livewire

### Filament Resources

```
EditInvoice
```
EditInvoice
```
EditInvoice
```
EditInvoice
page with overridden
```
mount()
```
mount()
```
mount()
```
mount()
to manually resolve the record
```
mutateFormDataBeforeFill()
```
mutateFormDataBeforeFill()
```
mutateFormDataBeforeFill()
```
mutateFormDataBeforeFill()
method to convert binaries to UUID strings before serialization

abkrimOP•12/7/25, 10:07 AM

Attempts Made

Attempt 1: Without external package

Custom

BinaryUuid

BinaryUuid

cast implementing

CastsAttributes

CastsAttributes

Override of serialization methods (
```
getAttributes()
```
```
getAttributes()
```
, toArray()toArray(), toJson()toJson())
Problem: Livewire's EloquentModelSynthEloquentModelSynth replaces converted values with raw binary values when the cast implements
```
CastsAttributes
```
```
CastsAttributes
```

### Attempt 2: With dyrynda/laravel-model-uuiddyrynda/laravel-model-uuid (EfficientUuid)

Installed michaeldyrynda/laravel-model-uuidmichaeldyrynda/laravel-model-uuid package
Applied EfficientUuidEfficientUuid cast to all binary UUID fields
Removed serialization overrides to avoid conflicts
Problem: The EfficientUuidEfficientUuid cast receives UUID strings when it expects binaries, causing InvalidArgumentException: $bytes string should contain 16 charactersInvalidArgumentException: $bytes string should contain 16 characters

### Attempt 3: Hybrid (current)

Custom
```
BinaryUuid
```
```
BinaryUuid
```
cast that handles both binaries and UUID strings
Override of
```
getAttributes()
```
```
getAttributes()
```
to ensure conversion before Livewire serialization
Override of
```
getRouteKey()
```
```
getRouteKey()
```
to get binary value directly
Current problem:
```
getRouteKey()
```
```
getRouteKey()
```
was generating malformed UUIDs in URLs (now fixed, but still investigating)

## Specific Questions

How does Filament generate edit URLs? Does it use
```
getRouteKey()
```
```
getRouteKey()
```
,
```
getKey()
```
```
getKey()
```
, or some other method?
Is there a recommended way to handle binary UUIDs with Filament v4? Has anyone successfully implemented this?
Is the problem in how I'm getting the raw attribute value? Is there a better way to bypass the cast to get the binary value?
Is Livewire's EloquentModelSynthEloquentModelSynth interfering? How can I ensure converted values persist during serialization?
Should I use a different approach? For example, use a uuiduuid accessor instead of modifying
```
getRouteKey()
```
```
getRouteKey()
```
?

## Additional Information

Laravel: 12.x
Filament: 4.x
Livewire: 3.x
PHP: 8.4.15
Database: MySQL 8.0

Any help or suggestions would be greatly appreciated. Thanks!

Matthew•12/8/25, 7:45 PM

If you're splitting the slug definer and the foreign key operators....why are you choosing any type of UUID to connect the tables?

# Filament v4 + Binary UUID v7 - Edit Route Issue## Context

Main Problem

Current Architecture

Database

Attempts Made

Attempt 1: Without external package

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Attempt 1: Without external package

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