【项目】:学员管理系统(mysql)
主题:学员管理系统
需求:
用户角色,讲师\学员, 用户登陆后根据角色不同,能做的事情不同,分别如下
讲师视图:
- 管理班级,可创建班级,根据学员qq号把学员加入班级
- 可创建指定班级的上课纪录,注意一节上课纪录对应多条学员的上课纪录, 即每节课都有整班学员上, 为了纪录每位学员的学习成绩,需在创建每节上课纪录是,同时为这个班的每位学员创建一条上课纪录
- 为学员批改成绩, 一条一条的手动修改成绩
学员视图:
- 提交作业
- 查看作业成绩
- 一个学员可以同时属于多个班级,就像报了Linux的同时也可以报名Python一样, 所以提交作业时需先选择班级,再选择具体上课的节数
- 附加:学员可以查看自己的班级成绩排名
表结构:
根据需求先画表结构
程序目录结构:
表结构实例代码:
from sqlalchemy import String,Column,Integer,ForeignKey,DATE,Table from sqlalchemy.ext.declarative import declarative_base from sqlalchemy.orm import relationship from conf.settings import engine ############创建数据表结构######################3 Base = declarative_base() # 班级与学生的对应关系表 teacher_m2m_class = Table("teacher_m2m_class",Base.metadata, Column("teacher_id", Integer, ForeignKey("teacher.teacher_id")), Column("class_id", Integer, ForeignKey("class.class_id")), ) # 班级与学生的对应关系表 class_m2m_student = Table("class_m2m_student",Base.metadata, Column("class_id",Integer,ForeignKey("class.class_id")), Column("stu_id", Integer, ForeignKey("student.stu_id")), ) class Class_m2m_Lesson(Base): '''班级和课节对应表''' __tablename__ = "class_m2m_lesson" id = Column(Integer, primary_key=True) class_id = Column(Integer,ForeignKey("class.class_id")) lesson_id = Column(Integer, ForeignKey("lesson.lesson_id")) classes = relationship("Class",backref="class_m2m_lessons") lessons = relationship("Lesson", backref="class_m2m_lessons") def __repr__(self): return "%s %s" % (self.classes,self.lessons) class Study_record(Base): "上课记录" __tablename__ = "study_record" id = Column(Integer,primary_key=True) class_m2m_lesson_id = Column(Integer,ForeignKey("class_m2m_lesson.id")) stu_id = Column(Integer, ForeignKey("student.stu_id")) status = Column(String(32),nullable=False) score = Column(Integer,nullable=True) class_m2m_lessons = relationship("Class_m2m_Lesson",backref="my_study_record") students = relationship("Student", backref="my_study_record") def __repr__(self): return "\033[35;0m%s,%s,状态:【%s】,成绩:【%s】\33[0m"%(self.class_m2m_lessons,self.students,self.status,self.score) class Teacher(Base): "讲师" __tablename__ = "teacher" teacher_id = Column(Integer, primary_key=True) teacher_name = Column(String(32), nullable=False, unique=True) #唯一 classes = relationship("Class", secondary=teacher_m2m_class, backref="teachers") def __repr__(self): return "讲师:【%s】"%self.teacher_name class Class(Base): "班级" __tablename__ ="class" class_id = Column(Integer, primary_key=True) class_name = Column(String(32), nullable=False,unique=True) course = Column(String(32), nullable=False) students = relationship("Student",secondary=class_m2m_student,backref="classes") def __repr__(self): return "班级名:【%s】"%self.class_name class Student(Base): "学生" __tablename__ ="student" stu_id = Column(Integer, primary_key=True) stu_name = Column(String(32), nullable=False, unique=True) QQ = Column(Integer(), nullable=False) def __repr__(self): return "学生名:【%s】"%self.stu_name class Lesson(Base): "课节" __tablename__ = "lesson" lesson_id = Column(Integer, primary_key=True) lesson_name = Column(String(32), nullable=False, unique=True) def __repr__(self): return "节次名:【%s】"%self.lesson_name Base.metadata.create_all(engine)
创建学习记录以及修改学生成绩:
def add_studyrecord(self): '''添加学习记录''' class_name = input("\033[34;0m请输入要添加学习记录的班级名:\033[0m") class_obj = self.session.query(Class).filter_by(class_name=class_name).first() if class_obj and class_obj.teachers[0] == self.teacher_obj: # 输入的班级名存在且在属于当前老师管理 lesson_name = input("\033[34;0m请输入添加学习记录的课节名(lesson):\033[0m") lesson_obj = self.session.query(Lesson).filter_by(lesson_name=lesson_name).first() if lesson_obj: # 输入的lesson名字存在 class_m2m_lesson_obj = self.session.query(Class_m2m_Lesson).filter(Class_m2m_Lesson.class_id == class_obj.class_id). \ filter(Class_m2m_Lesson.lesson_id == lesson_obj.lesson_id).first() if class_m2m_lesson_obj: # 班级对应的课lesson表数据存在 study_record_obj = self.session.query(Study_record).filter_by(class_m2m_lesson_id=class_m2m_lesson_obj.id).first() if not study_record_obj: # 上课记录为创建 for student_obj in class_obj.students: status = input("输入学生 %s 的上课状态(yes/no):"%student_obj.stu_name) study_record_new = Study_record(class_m2m_lesson_id=class_m2m_lesson_obj.id, stu_id=student_obj.stu_id, status=status) self.session.add(study_record_new) self.session.commit() else: print("\33[31;1m系统错误:当前上课记录已经创建\33[0m") else: print("\33[31;1m系统错误:当前班级的lesson课节未创建\33[0m") else: print("\33[31;1m系统错误:lesson未创建\33[0m") else: print("\33[31;1m输入错误:班级不存在或没有权限管理此班级\33[0m") def modify_scores(self): '''修改成绩''' class_name = input("\033[34;0m请输入学习记录的班级名:\033[0m") class_obj = self.session.query(Class).filter_by(class_name=class_name).first() if class_obj and class_obj.teachers[0] == self.teacher_obj: # 输入的班级名存在且在属于当前老师管理 lesson_name = input("\033[34;0m请输入学习记录的课节名(lesson):\033[0m") lesson_obj = self.session.query(Lesson).filter_by(lesson_name=lesson_name).first() if lesson_obj: # 输入的lesson名字存在 class_m2m_lesson_obj = self.session.query(Class_m2m_Lesson).filter( Class_m2m_Lesson.class_id == class_obj.class_id). \ filter(Class_m2m_Lesson.lesson_id == lesson_obj.lesson_id).first() if class_m2m_lesson_obj: # 班级对应的课lesson表数据存在 while True: study_record_objs = self.session.query(Study_record).filter( Study_record.class_m2m_lesson_id==class_m2m_lesson_obj.id).all() for obj in study_record_objs: print(obj) student_name = input("\033[34;0m输入要修改成绩的学生名:[Q 退出]\33[0m") if student_name == "q" or student_name == "Q":break student_obj = self.session.query(Student).filter_by(stu_name=student_name).first() if student_obj: study_record_obj = self.session.query(Study_record).filter( Study_record.class_m2m_lesson_id==class_m2m_lesson_obj.id).filter( Study_record.stu_id == student_obj.stu_id).first() if study_record_obj: # 上课记录存在 score = input("\033[34;0m输入修改后的成绩\33[0m") study_record_obj.score= score self.session.commit() else: print("\33[31;1m系统错误:当前上课记录已经创建\33[0m") else: print("\33[31;1m系统错误:当前班级的lesson课节未创建\33[0m") else: print("\33[31;1m系统错误:lesson未创建\33[0m") else: print("\33[31;1m输入错误:班级不存在或没有权限管理此班级\33[0m")
上面的两段代码实现了主要的功能,其他的功能都是套路,都一样。。。。
完整代码地址--》》https://coding.net/u/James_Lian/p/Whaterver/git/tree/master