Models

Name: Models Description: Eloquent model conventions covering mass assignment, casts, relationships, section headers, and activity logging. Every model must follow these structural rules. Compatible Agents: general-purpose, backend Tags: app/Models/**/*.php, laravel, php, backend, eloquent, model, database

Rules

• Use $guarded = [] — never use $fillable arrays
• Define casts() as a method, not a property
• Cast enums, dates, decimals, and JSON in casts()
• Add the LogsActivity trait on all business models
• Configure getActivitylogOptions() with logAll(), logOnlyDirty(), dontSubmitEmptyLogs()
• Use typed return types on all relationship methods (HasMany, BelongsTo, etc.)
• Every new model must have a corresponding factory in database/factories/
• Group model code with section comment headers: // --- Relationships ---, // --- Status Helpers ---, etc.

Examples

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Spatie\Activitylog\LogOptions;
use Spatie\Activitylog\Traits\LogsActivity;

class Invoice extends Model
{
    use LogsActivity;

    protected $guarded = [];

    protected function casts(): array
    {
        return [
            'status'   => Status::class,
            'due_date' => 'date',
            'amount'   => 'decimal:2',
        ];
    }

    // --- Relationships ---

    public function lines(): HasMany
    {
        return $this->hasMany(InvoiceLine::class);
    }

    // --- Status Helpers ---

    public function isDraft(): bool
    {
        return $this->status === Status::Draft;
    }

    public function isPaid(): bool
    {
        return $this->status === Status::Paid;
    }

    // --- Activity Log ---

    public function getActivitylogOptions(): LogOptions
    {
        return LogOptions::defaults()
            ->logAll()
            ->logOnlyDirty()
            ->dontSubmitEmptyLogs();
    }
}

Anti-Patterns

• Using $fillable arrays instead of $guarded = []
• Defining $casts as a property instead of a casts() method
• Not using the LogsActivity trait on business models
• Omitting return types on relationship methods
• Creating a model without a corresponding factory
• Putting business logic directly in the model — use Actions

References

• Laravel Eloquent Models
• Spatie Activity Log
• Related: Enums/SKILL.md — enums are cast in casts()
• Related: Migrations/SKILL.md — migrations define the model's schema