diff --git a/src/main/java/com/codesdream/ase/model/student/Moment.java b/src/main/java/com/codesdream/ase/model/student/Moment.java
deleted file mode 100644
index bc8de2f..0000000
--- a/src/main/java/com/codesdream/ase/model/student/Moment.java
+++ /dev/null
@@ -1,33 +0,0 @@
-package com.codesdream.ase.model.student;
-
-import com.codesdream.ase.model.file.Image;
-import lombok.Data;
-
-import javax.persistence.*;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.concurrent.atomic.AtomicInteger;
-
-// 动态/说说
-@Entity
-@Table
-@Data
-public class Moment {
-    @Id
-    @GeneratedValue(strategy = GenerationType.AUTO)
-    int id;
-
-    int userId;
-    // 动态内容
-    String description;
-
-    // 点赞计数
-    AtomicInteger likeCount = new AtomicInteger(0);
-
-    // 评论
-    @OneToMany(cascade = CascadeType.ALL)
-    List<Comment> comments = new ArrayList<>();
-
-    @OneToMany(cascade = CascadeType.MERGE)
-    List<Image> images = new ArrayList<>();
-}
\ No newline at end of file
diff --git a/src/main/java/com/codesdream/ase/model/student/StudentCourse.java b/src/main/java/com/codesdream/ase/model/student/StudentCourse.java
index 8b8d347..0c1c52e 100644
--- a/src/main/java/com/codesdream/ase/model/student/StudentCourse.java
+++ b/src/main/java/com/codesdream/ase/model/student/StudentCourse.java
@@ -12,15 +12,14 @@ public class StudentCourse {
     @Id
     int id;
 
-    @OneToOne(cascade = CascadeType.MERGE)
-    Student student;
+    String studentId;
 
-    @OneToOne(cascade = CascadeType.MERGE)
-    Course course;
+    String courseId;
 
     @Column(nullable = false)
     float score;
 
+    @Column(nullable = false)
     boolean isFailed;
 
     Date finishedDate;
diff --git a/src/main/java/com/codesdream/ase/repository/student/SCRepository.java b/src/main/java/com/codesdream/ase/repository/student/SCRepository.java
new file mode 100644
index 0000000..4b170a4
--- /dev/null
+++ b/src/main/java/com/codesdream/ase/repository/student/SCRepository.java
@@ -0,0 +1,15 @@
+package com.codesdream.ase.repository.student;
+
+import com.codesdream.ase.model.student.StudentCourse;
+import org.springframework.data.domain.Sort;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+@Repository
+public interface SCRepository extends JpaRepository<StudentCourse, Integer> {
+
+    List<StudentCourse> findByStudentId(String studentId);
+    List<StudentCourse> findByStudentId(String studentId, Sort sort);
+}