Python开发【项目】:学员管理系统(mysql)

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

Python开发【项目】:学员管理系统(mysql)

程序目录结构:

Python开发【项目】:学员管理系统(mysql)

表结构实例代码:

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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:

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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

参考:https://www.cnblogs.com/sean-yao/p/8088186.html

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