feat: Add Interests entity (#17)

src/main/java/com/beotkkot/qtudy/domain/interests/Interests.java

@@ -0,0 +1,24 @@
+package com.beotkkot.qtudy.domain.interests;
+
+import com.beotkkot.qtudy.domain.primaryKey.InterestsPK;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.IdClass;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@Entity
+@IdClass(InterestsPK.class) // 복합 키 생성
+public class Interests {
+ @Id
+ private Long userId;
+
+ @Id
+ private Long categoryId;
+}

src/main/java/com/beotkkot/qtudy/domain/primaryKey/InterestsPK.java

@@ -0,0 +1,21 @@
+package com.beotkkot.qtudy.domain.primaryKey;
+
+import jakarta.persistence.Column;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.io.Serializable;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class InterestsPK implements Serializable {
+ @Column(name = "user_id")
+ private Long userId;
+
+ @Column(name = "category_id")
+ private Long categoryId;
+}