# Migrations & Schema Builder (Laravel)

> Migration 생성, schema builder, 컬럼 타입, index, foreign key, rollback, seeder, factory

- 20 면접 질문
- Mid-Level
- [면접 질문: Laravel](https://sharpskill.dev/ko/technologies/laravel/interview-questions.md)

## 1. 새 migration을 생성하는 artisan 명령어는 무엇입니까?

**답변**

make:migration 명령어는 자동 timestamp와 함께 database/migrations 폴더에 새 migration 파일을 생성합니다. 이 명령어는 설명적인 migration 이름을 받으며 --create 또는 --table 옵션을 사용해 기본 코드를 자동으로 생성할 수 있습니다. 이 명령어를 사용하면 표준화된 구조와 일관된 migration 명명이 보장됩니다.

## 2. 새 테이블을 생성하는 Schema Builder 메서드는 무엇입니까?

**답변**

Schema::create() 메서드는 데이터베이스에 새 테이블을 생성합니다. 두 개의 파라미터를 받는데, 테이블 이름과 컬럼을 정의하기 위해 Blueprint 객체를 받는 closure입니다. 이 메서드는 새로운 데이터 구조를 생성하기 위해 migration의 up() 메서드에서 사용됩니다.

## 3. auto-increment UNSIGNED BIGINT 식별자를 저장하려면 어떤 컬럼 타입을 사용해야 합니까?

**답변**

id() 메서드는 primary key 역할을 하는 auto-increment UNSIGNED BIGINT 컬럼을 생성합니다. 이는 Laravel 6부터 권장되는 식별자 타입으로 increments()를 대체합니다. 이 메서드는 auto-increment와 primary key 제약 조건을 자동으로 구성하여 테이블 정의를 단순화합니다.

## 17개 추가 질문 이용 가능

- 테이블에 created_at과 updated_at 컬럼을 추가하는 메서드는 무엇입니까?
- 대기 중인 모든 migration을 실행하는 artisan 명령어는 무엇입니까?

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