nihonbuzz-academy/app/Models/Course.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Concerns\HasUuids;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class Course extends Model
{
    use HasFactory, HasUuids, SoftDeletes;

    protected $guarded = [];

    protected $casts = [
        'metadata' => 'array',
        'is_published' => 'boolean',
        'price' => 'decimal:2',
    ];

    public function level(): BelongsTo
    {
        return $this->belongsTo(Level::class);
    }

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

    public function modules(): HasMany
    {
        return $this->hasMany(Module::class)->orderBy('order_index');
    }

    public function teacher(): BelongsTo
    {
        return $this->belongsTo(User::class, 'teacher_id');
    }
}