[1단계 - 엔티티 매핑] 디투 미션 제출합니다

src/main/java/qna/config/JpaConfig.java

@@ -0,0 +1,9 @@
+package qna.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
+
+@Configuration(proxyBeanMethods = false)
+@EnableJpaAuditing
+public class JpaConfig {
+}

src/main/java/qna/domain/Answer.java

@@ -3,15 +3,36 @@
 import qna.NotFoundException;
 import qna.UnAuthorizedException;
 
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.ForeignKey;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.Lob;
+import javax.persistence.ManyToOne;
 import java.util.Objects;
 
-public class Answer {
+@Entity
+public class Answer extends BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
-    private Long writerId;
-    private Long questionId;
+    @ManyToOne
+    @JoinColumn(name = "writer_id", foreignKey = @ForeignKey(name = "fk_answer_writer"))
+    private User writer;
+    @ManyToOne
+    @JoinColumn(name = "question_id", foreignKey = @ForeignKey(name = "fk_answer_to_question"))
+    private Question question;
+    @Lob
     private String contents;
+    @Column
     private boolean deleted = false;
 
+    protected Answer() {}
+
     public Answer(User writer, Question question, String contents) {
         this(null, writer, question, contents);
     }
@@ -27,51 +48,35 @@ public Answer(Long id, User writer, Question question, String contents) {
             throw new NotFoundException();
         }
 
-        this.writerId = writer.getId();
-        this.questionId = question.getId();
+        this.writer = writer;
+        this.question = question;
         this.contents = contents;
     }
 
     public boolean isOwner(User writer) {
-        return this.writerId.equals(writer.getId());
+        return this.writer.equals(writer);
     }
 
     public void toQuestion(Question question) {
-        this.questionId = question.getId();
+        this.question = question;
     }
 
     public Long getId() {
         return id;
     }
 
-    public void setId(Long id) {
-        this.id = id;
-    }
-
-    public Long getWriterId() {
-        return writerId;
-    }
-
-    public void setWriterId(Long writerId) {
-        this.writerId = writerId;
-    }
-
-    public Long getQuestionId() {
-        return questionId;
+    public User getWriter() {
+        return writer;
     }
 
-    public void setQuestionId(Long questionId) {
-        this.questionId = questionId;
+    public Question getQuestion() {
+        return question;
     }
 
     public String getContents() {
         return contents;
     }
 
-    public void setContents(String contents) {
-        this.contents = contents;
-    }
-
     public boolean isDeleted() {
         return deleted;
     }
@@ -84,8 +89,8 @@ public void setDeleted(boolean deleted) {
     public String toString() {
         return "Answer{" +
                 "id=" + id +
-                ", writerId=" + writerId +
-                ", questionId=" + questionId +
+                ", writer.id=" + writer.getId() +
+                ", question.id=" + question.getId() +
                 ", contents='" + contents + '\'' +
                 ", deleted=" + deleted +
                 '}';

src/main/java/qna/domain/BaseEntity.java

@@ -0,0 +1,29 @@
+package qna.domain;
+
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.LastModifiedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+import javax.persistence.Column;
+import javax.persistence.EntityListeners;
+import javax.persistence.MappedSuperclass;
+import java.time.LocalDateTime;
+
+@MappedSuperclass
+@EntityListeners(AuditingEntityListener.class)
+public abstract class BaseEntity {
+
+    @CreatedDate
+    @Column(updatable = false)
+    private LocalDateTime createdAt;
+    @LastModifiedDate
+    private LocalDateTime updatedAt;
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public LocalDateTime getUpdatedAt() {
+        return updatedAt;
+    }
+}

src/main/java/qna/domain/DeleteHistory.java

@@ -1,36 +1,57 @@
 package qna.domain;
 
+import org.springframework.data.annotation.CreatedDate;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.EnumType;
+import javax.persistence.Enumerated;
+import javax.persistence.ForeignKey;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
 import java.time.LocalDateTime;
 import java.util.Objects;
 
+@Entity
 public class DeleteHistory {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
+    @Enumerated(EnumType.STRING)
     private ContentType contentType;
+    @Column
     private Long contentId;
-    private Long deletedById;
+    @ManyToOne
+    @JoinColumn(name = "deleted_by_id", foreignKey = @ForeignKey(name = "fk_delete_history_to_user"))
+    private User deletedBy;
+    @CreatedDate
     private LocalDateTime createDate = LocalDateTime.now();
 
-    public DeleteHistory(ContentType contentType, Long contentId, Long deletedById, LocalDateTime createDate) {
+    public DeleteHistory(ContentType contentType, Long contentId, User deletedBy, LocalDateTime createDate) {
         this.contentType = contentType;
         this.contentId = contentId;
-        this.deletedById = deletedById;
+        this.deletedBy = deletedBy;
         this.createDate = createDate;
     }
 
+    protected DeleteHistory() {
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;
         if (o == null || getClass() != o.getClass()) return false;
         DeleteHistory that = (DeleteHistory) o;
-        return Objects.equals(id, that.id) &&
-                contentType == that.contentType &&
-                Objects.equals(contentId, that.contentId) &&
-                Objects.equals(deletedById, that.deletedById);
+        return Objects.equals(id, that.id);
     }
 
     @Override
     public int hashCode() {
-        return Objects.hash(id, contentType, contentId, deletedById);
+        return Objects.hash(id);
     }
 
     @Override
@@ -39,7 +60,7 @@ public String toString() {
                 "id=" + id +
                 ", contentType=" + contentType +
                 ", contentId=" + contentId +
-                ", deletedById=" + deletedById +
+                ", deletedBy.Id=" + deletedBy.getId() +
                 ", createDate=" + createDate +
                 '}';
     }

src/main/java/qna/domain/Question.java

@@ -1,11 +1,39 @@
 package qna.domain;
 
-public class Question {
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.ForeignKey;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.Lob;
+import javax.persistence.ManyToOne;
+import javax.persistence.OneToMany;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+@Entity
+public class Question extends BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
+    @Column(length = 100, nullable = false)
     private String title;
+    @Lob
     private String contents;
-    private Long writerId;
-    private boolean deleted = false;
+    @ManyToOne
+    @JoinColumn(name = "writer_id", updatable = false, foreignKey = @ForeignKey(name = "fk_question_writer"))
+    private User writer;
+    @Column(nullable = false)
+    private boolean deleted;
+    @OneToMany(mappedBy = "question")
+    private List<Answer> answers = new ArrayList<>();
+
+    protected Question() {
+    }
 
     public Question(String title, String contents) {
         this(null, title, contents);
@@ -18,12 +46,12 @@ public Question(Long id, String title, String contents) {
     }
 
     public Question writeBy(User writer) {
-        this.writerId = writer.getId();
+        this.writer = writer;
         return this;
     }
 
     public boolean isOwner(User writer) {
-        return this.writerId.equals(writer.getId());
+        return this.writer.equals(writer);
     }
 
     public void addAnswer(Answer answer) {
@@ -34,32 +62,16 @@ public Long getId() {
         return id;
     }
 
-    public void setId(Long id) {
-        this.id = id;
-    }
-
     public String getTitle() {
         return title;
     }
 
-    public void setTitle(String title) {
-        this.title = title;
-    }
-
     public String getContents() {
         return contents;
     }
 
-    public void setContents(String contents) {
-        this.contents = contents;
-    }
-
-    public Long getWriterId() {
-        return writerId;
-    }
-
-    public void setWriterId(Long writerId) {
-        this.writerId = writerId;
+    public User getWriter() {
+        return writer;
     }
 
     public boolean isDeleted() {
@@ -70,13 +82,30 @@ public void setDeleted(boolean deleted) {
         this.deleted = deleted;
     }
 
+    public List<Answer> getAnswers() {
+        return answers;
+    }
+
+    @Override
+    public boolean equals(final Object o) {
+        if (this == o) return true;
+        if (!(o instanceof Question)) return false;
+        Question question = (Question) o;
+        return Objects.equals(id, question.id);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id);
+    }
+
     @Override
     public String toString() {
         return "Question{" +
                 "id=" + id +
                 ", title='" + title + '\'' +
                 ", contents='" + contents + '\'' +
-                ", writerId=" + writerId +
+                ", writer.id=" + writer.getId() +
                 ", deleted=" + deleted +
                 '}';
     }