π 3λ¨κ³ - μκ°μ μ²(DB μ μ©) #756
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ksy90101
requested changes
Apr 21, 2025
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| import java.time.LocalDateTime; | ||
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| public class EnrolledStudent { |
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κ΅³μ΄ Enrolledλ₯Ό λΆμΌ μ΄μ κ° μμκΉμ?
Studentλ‘λ§μΌλ‘λ μΆ©λΆν λλ©μΈ μ€λͺ
μ΄ κ°λ₯ν΄ λ³΄μ¬μμ~
| public class EnrolledStudent { | ||
| private Long id; | ||
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| private String userId; |
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κ°μ²΄μ§ν₯μ μΌλ‘ Userλ₯Ό κ°μ§κ³ μκ² νλ©΄ μ΄λ¨κΉμ?
| String sql = "INSERT INTO enrolled_student (session_id, user_id, enrolled_at) VALUES (?, ?, ?)"; | ||
| jdbcTemplate.update( | ||
| sql, | ||
| enrolledStudent.getSession().getId(), // session κ°μ²΄μμ id κΊΌλ |
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λλ―Έν°μ λ²μΉμ μλ°νκ² κ°μ΅λλ€.
λ°λ‘ Idλ§ λΉΌλ getterλ₯Ό λ§λμλ©΄ μ΄λ¨κΉμ?
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| CoverImage coverImage = new CoverImage( | ||
| rs.getInt("cover_image_size"), | ||
| ImageType.valueOf(rs.getString("cover_image_type")), | ||
| rs.getInt("cover_image_width"), | ||
| rs.getInt("cover_image_height") | ||
| ); |
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CoverImageκ° μ¬μ¬μ©λ μΌμ΄ μμκΉμ?
μ κ·ν κ΄μ μμ νλ² κ³ λ―Όν΄λ³΄μ
¨μΌλ©΄ μ’κ² μ΅λλ€.
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μλ νμΈμ 리뷰μ΄λ!
3λ¨κ³ λ―Έμ μ DBμ λλ©μΈμ λΆλ¦¬ κ°κ°μ λ껴보λκ² μλμΈκ² κ°μ΅λλ€.
λ무 μκ° λΊκΈ°λκ² κ°μμ μλΉμ€ λ μ΄μ΄μμ νμλ‘ νλ DAOμ λ©μλλ§ μ΅μνμΌλ‘ ꡬννμ΄μ. μλλ μ κ° μκ°νλ μ΄ λ―Έμ μμ μ»μ΄κ°μΌν μκ°λ€μ μ 리ν΄λ³΄μμ΅λλ€.