mysql - 学生管理系统

要求：

　　ORM 版的学生管理系统

功能介绍：

* 讲师视图：
　　1：查看班级
　　2：创建班级
　　3：添加学员
　　4：创建课程
　　5：修改成绩
　　6：签到
　　7：返回

* 学员视图：
　　1：查看成绩(学员全部成绩并排行)

 

* 数据关系图

 

 

* 系统流程图

 * table模型

#!/usr/bin/env python
# -*- coding: utf-8 -*-

__author__ = \'Fade Zhao\'
from sqlalchemy import String,Column,Integer,ForeignKey,DATE,Table
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship
from config.setting import engine

Base = declarative_base()
# 班级对学生
grades_m2m_students = Table(\'grades_m2m_students\',Base.metadata,
                            Column(\'grade_id\',Integer,ForeignKey(\'grades.grade_id\')),
                            Column(\'student_id\',Integer,ForeignKey(\'students.student_id\')))

# 班级对老师
grades_m2m_teachers = Table(\'grades_m2m_teachers\',Base.metadata,
                            Column(\'grade_id\',Integer,ForeignKey(\'grades.grade_id\')),
                            Column(\'teacher_id\',Integer,ForeignKey(\'teachers.teacher_id\'))
                            )



# 班级对课程
class grades_m2m_lessons(Base):
    __tablename__ = \'grades_m2m_lessons\'
    id = Column(Integer,primary_key=True)
    grade_id = Column(Integer,ForeignKey(\'grades.grade_id\'))
    lesson_id = Column(Integer,ForeignKey(\'lessons.lesson_id\'))

    grade = relationship(\'grades\',backref = \'grades_m2m_lesson\')
    lesson = relationship(\'lessons\',backref = \'grades_m2m_lesson\')

    def __repr__(self):
        return \'\033[33;1m%d grade_id=%d ,lesson_id%d\033[0m\'%(self.id,self.grade_id,self.lesson_id)
class study_records(Base):
    \'\'\'学习记录\'\'\'
    __tablename__ = \'study_records\'
    id = Column(Integer,primary_key=True)
    grades_lesson_id = Column(Integer,ForeignKey(\'grades_m2m_lessons.id\'))
    student_id = Column(Integer,ForeignKey(\'students.student_id\'))
    studied = Column(String(32),nullable=False,default=\'NO\')
    score = Column(Integer,nullable=False,default=0)

    grades_m2m_lesson = relationship(\'grades_m2m_lessons\',backref = \'study_record\')
    student = relationship(\'students\',backref = \'study_record\')
    def __repr__(self):
        return \'\033[33;1mID：{0} grades_lesson_id：{1} student_id-{2} 是否学完：{3} 成绩：{4}\033[0m\'.format(self.id,
                                self.grades_lesson_id,
                                self.student_id,
                                self.studied,
                                self.score)

class students(Base):
    \'\'\'学生\'\'\'
    __tablename__ = \'students\'
    student_id = Column(Integer,primary_key=True)
    name = Column(String(32),nullable=False,unique=True)
    QQ = Column(String(32),nullable=False,unique=True)

    def __repr__(self):
        return \'\033[33;1mID：%d 姓名：%s QQ：%s\033[0m\'%(self.student_id,self.name,self.QQ)
class teachers(Base):
    \'\'\'老师\'\'\'
    __tablename__ = \'teachers\'
    teacher_id = Column(Integer,primary_key=True)
    name = Column(String(32),nullable=False,unique=True)

    def __repr__(self):
        return \'\033[33;1m姓名:%s\033[0m\' % (self.name)
class lessons(Base):
    \'\'\'课程\'\'\'
    __tablename__ = \'lessons\'
    lesson_id = Column(Integer,primary_key=True)
    lesson_name = Column(String(32),nullable=False)

class grades(Base):
    \'\'\'班级\'\'\'
    __tablename__ = \'grades\'
    grade_id = Column(Integer,primary_key=True)
    grade_name = Column(String(32),nullable=False,unique=True)
    grade_course = Column(String(32),nullable=False)

    students = relationship(\'students\',secondary = grades_m2m_students,backref = \'grades\')
    teachers = relationship(\'teachers\',secondary = grades_m2m_teachers,backref = \'grades\')

    def __repr__(self):
        return \'\033[33;1m%d 名称 %s  科目 %s\033[0m\'%(self.grade_id,self.grade_name,self.grade_course)



def init_database():
    Base.metadata.create_all(engine)