Enrollment.php

<?php

namespace App\Models;

use Database\Factories\ArticleFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\SoftDeletes;
use Illuminate\Contracts\Pagination\Paginator;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Support\Facades\Log;

class Enrollment extends Model
{
    use SoftDeletes;
    use HasFactory;

    /**
     * The table associated with the model.
     *
     * @var string
     */
    protected $table = 'enrollments';

    protected $fillable = ['students_id', 'course_id'];

    /**
     * The attributes that should be mutated to dates.
     *
     * @var array
     */
    protected $dates = ['deleted_at'];

    /**
     * The attributes that should be cast to native types.
     *
     * @var array
     */
    protected $casts = [

    ];

    /**
     * Load all for admin and paginate
     *
     * @return Paginator
     */
    public static function loadAll(): Paginator
    {
        return static::latest()
            ->paginate();
    }


    public function student()
    {
        return $this->belongsTo(User::class, 'student_id');
    }

    public function course()
    {
        return $this->belongsTo(Course::class, 'course_id');
    }

    public function lessons()
    {
        return $this->hasMany(Lesson::class, 'enrollment_id');
    }

    public static function getOne(int $course_id, int $student_id) : ?Enrollment
    {
        return static::where('course_id', $course_id)->where('student_id', $student_id)->first();
    }

}