'integer', 'course_id' => 'integer', 'venue_id' => 'integer', 'from' => 'datetime', 'to' => 'datetime', ]; protected static function booted() { static::creating(function ($model) { if (!$model->created_by) { $model->created_by = auth()->id(); } }); } public function createdBy(): BelongsTo { return $this->belongsTo(User::class, 'created_by'); } public function course(): BelongsTo { return $this->belongsTo(Course::class); } public function venue(): BelongsTo { return $this->belongsTo(Venue::class); } public function registrations(): HasMany { return $this->hasMany(Registration::class); } }