예제 도메인 모델

1. 도메인 모델

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2. Member

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package study.querydsl.entity;

import lombok.*;

import javax.persistence.*;

@Entity
@Getter @Setter
@NoArgsConstructor(access = AccessLevel.PROTECTED)
@ToString(of = {"id", "username", "age"})
public class Member {

    @Id @GeneratedValue
    @Column(name = "member_id")
    private Long id;

    private String username;
    private int age;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "team_id")
    private Team team;


    public Member(String username, int age, Team team) {
        this.username = username;
        this.age = age;
        if(team != null){
            changeTeam(team);
        }
    }

    public Member(String username) {
       this(username, 0);
    }

    public Member(String username, int age) {
        this(username, age, null);
    }

    private void changeTeam(Team team) {
        this.setTeam(team);
        team.getMembers().add(this);
    }
}

 

 

 

3. Team

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package study.querydsl.entity;

import lombok.*;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import java.util.ArrayList;
import java.util.List;

@Entity
@Getter @Setter
@NoArgsConstructor(access = AccessLevel.PROTECTED)
@ToString(of = {"id", "name"})
public class Team {

    @Id @GeneratedValue
    @Column(name = "team_id")
    private Long id;
    private String name;

    @OneToMany(mappedBy = "team")
    private List<Member> members = new ArrayList<>();

    public Team(String name) {
        this.name = name;
    }
}

 

4. GitHub : 210901 Entity Model

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GitHub - bsh6463/Querydsl