'integer', 'verified_at' => 'datetime', ]; public function shipment(): BelongsTo { return $this->belongsTo(Shipment::class); } public function form(): BelongsTo { return $this->belongsTo(CommitmentForm::class, 'commitment_form_id'); } public function uploader(): BelongsTo { return $this->belongsTo(User::class, 'uploaded_by'); } public function verifier(): BelongsTo { return $this->belongsTo(User::class, 'verified_by'); } }