forked from caojinliang/StuManagerSys
58 lines
2.8 KiB
Python
58 lines
2.8 KiB
Python
from sqlalchemy.orm import Session
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from model.student_model import Student
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from schema.student_schema import StudentCreateRequest,StudentUpdateRequest
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def create_student(db: Session, student_create: StudentCreateRequest):
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"""
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新增学生
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: db: 数据库会话
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:student_c reate: 前端传来的新增请求体
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"""
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db_student = Student(**student_create.model_dump())#请求体转为字典，再解包创建实体对象
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db.add(db_student)#添加
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db.commit()#提交事务
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new_student=db.query(Student).filter(
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Student.stu_id==student_create.stu_id,
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Student.is_deleted==False).first()
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#查询 Student 表,取第一条，没有则返回 None
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return new_student
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def get_student_by_id(db: Session, stu_id: int):#根据stu_id查询单个学生
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query = db.query(Student).filter(
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Student.stu_id == stu_id,
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Student.is_deleted == False)
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return query.first()
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def get_student_list(db: Session, stu_id:None,
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class_id:str=None, page:int=1, page_size:int=10, stu_name:str=None):#查询学生列表，支持按照编号/姓名/班级删选
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# 基础查询：只查未逻辑删除的学生
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query = db.query(Student).filter(Student.is_deleted == False)
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if stu_id:
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query = query.filter(Student.stu_id == stu_id)
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if stu_name:
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query = query.filter(Student.stu_name == stu_name)
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if class_id:
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query = query.filter(Student.class_id == class_id)
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total = query.count()#统计满足条件的记录
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offset = (page - 1) * page_size# 计算分页偏移量：跳过前面 (page-1)*page_size 条
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db_student_list = query.offset(offset).limit(page_size).all()# 执行分页查询：跳过offset条，取page_size条
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return total, db_student_list
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def update_student(db: Session, stu_id:int,student_update: StudentUpdateRequest):
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"""修改学生信息
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db: 数据库会话stu_id: 要修改的学生主键student_update: 前端传来的修改请求体:
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"""
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db_student = get_student_by_id(db=db,stu_id=stu_id)
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if not db_student:
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return None#先查学生，查不到报错
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update_data=student_update.model_dump(exclude_unset=True)#只解析前端输入的键值对，默认值不会解析
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for k,v in update_data.items():
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setattr(db_student,k,v)#把 value 赋给 db_student 的 key 属性。
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db.commit()
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updated_student=get_student_by_id(db, stu_id)
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return updated_student
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def delete_student_logic(db: Session, stu_id:int):
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db_student = get_student_by_id(db, stu_id)
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if not db_student:
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return None
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db_student.is_deleted = True#把逻辑删除标记改成True
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db.commit()#重新查询，返回标记已删除的这条记录
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deleted_student = db.query(Student).filter(Student.stu_id == stu_id).first()
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return deleted_student
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