'required|array|min:1', 'file_ids.*' => 'required|integer|exists:files,id', 'folder_id' => 'required|integer|exists:folders,id', 'document_id' => 'nullable|integer', 'document_type' => 'nullable|string|max:100', ]; } public function messages(): array { return [ 'file_ids.required' => __('error.file_ids_required'), 'file_ids.array' => __('error.file_ids_must_be_array'), 'file_ids.*.exists' => __('error.file_not_found'), 'folder_id.required' => __('error.folder_id_required'), 'folder_id.exists' => __('error.folder_not_found'), ]; } }