学生管理系统代码

2026-09-21 19:22:31 +08:00
commit ef88fbdbe9
61 changed files with 4203 additions and 0 deletions
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+from sqlalchemy.orm import Session
+
+from model import Score, Student
+from schema.score_schema import ScoreUpdate, ScoreCreate
+
+
+#添加成绩
+def create_score(
+        db:Session,
+        score_data:ScoreCreate,
+):
+    stu = db.query(Student).filter(Student.sid == score_data.student_id, Student.flag == 1).first()
+    if stu is None:
+        raise ValueError("该学生不存在")
+    if score_data.exam_id not in (1, 2, 3):
+        raise ValueError("考试次序不合法")
+    if not isinstance(score_data.score, int) or not (0 <= score_data.score <= 100):
+        raise ValueError("成绩不合法")
+    exist = db.query(Score).filter(Score.student_id == score_data.student_id,Score.exam_id == score_data.exam_id,Score.flag == 1).first()
+    if exist:
+        return None
+    new_score = Score(
+        student_id=score_data.student_id,
+        exam_id=score_data.exam_id,
+        score=score_data.score,
+        flag=1
+    )
+    #添加到数据库会话
+    db.add(new_score)
+    db.commit()
+    #覆盖Python原始数据
+    db.refresh(new_score)
+    return new_score
+
+#查询学生成绩
+def search_score(
+        db:Session,
+        student_id:int,
+        exam_id:int,
+):
+    stu = db.query(Student).filter(Student.sid == student_id, Student.flag == 1).first()
+    if stu is None:
+        raise ValueError("该学生不存在")
+    if exam_id not in (1, 2, 3):
+        raise ValueError("考试次序不合法")
+    return db.query(Score).filter(
+        Score.flag == 1,
+        Score.student_id == student_id,
+        Score.exam_id == exam_id
+    ).all()
+
+#修改成绩
+def update_score(
+        db:Session,
+        student_id:int,
+        exam_id:int,
+        score_data:ScoreUpdate,
+):
+    stu = db.query(Student).filter(Student.sid == student_id, Student.flag == 1).first()
+    if stu is None:
+        raise ValueError("该学生不存在")
+    if exam_id not in (1, 2, 3):
+        raise ValueError("考试次序不合法")
+    if not isinstance(score_data.score, int) or not (0 <= score_data.score <= 100):
+        raise ValueError("成绩不合法")
+    score = db.query(Score).filter(Score.student_id == student_id,Score.exam_id == exam_id,Score.flag == 1).first()
+    if score is None:
+        return None
+    update_data = score_data.model_dump(exclude_unset=True)
+    for k,v in update_data.items():
+        setattr(score,k,v)
+    db.commit()
+    db.refresh(score)
+    return score
+
+#删除成绩
+def delete_score(db:Session,student_id:int,exam_id:int):
+    stu = db.query(Student).filter(Student.sid == student_id, Student.flag == 1).first()
+    if stu is None:
+        raise ValueError("该学生不存在")
+
+    if exam_id not in (1, 2, 3):
+        raise ValueError("考试次序不合法")
+
+    score = db.query(Score).filter(
+        Score.student_id == student_id,
+        Score.flag == 1,
+        Score.exam_id == exam_id
+    ).first()
+    if score is None:
+        return None
+    #逻辑删除，磁盘保留
+    score.flag = 0
+    db.commit()
+    db.refresh(score)
+    return score