Python開發【項目】:學員管理系統(mysql)
阿新 • • 發佈:2018-09-24
string lena odi keyword kref 以及 報名 目錄 plain
需求:
用戶角色,講師\學員, 用戶登陸後根據角色不同,能做的事情不同,分別如下
講師視圖:
- 管理班級,可創建班級,根據學員qq號把學員加入班級
- 可創建指定班級的上課紀錄,註意一節上課紀錄對應多條學員的上課紀錄, 即每節課都有整班學員上, 為了紀錄每位學員的學習成績,需在創建每節上課紀錄是,同時為這個班的每位學員創建一條上課紀錄
- 為學員批改成績, 一條一條的手動修改成績
學員視圖:
- 提交作業
- 查看作業成績
- 一個學員可以同時屬於多個班級,就像報了Linux的同時也可以報名Python一樣, 所以提交作業時需先選擇班級,再選擇具體上課的節數
- 附加:學員可以查看自己的班級成績排名
表結構:
根據需求先畫表結構
程序目錄結構:
表結構實例代碼:
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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
############創建數據表結構######################3
Base = declarative_base()
# 班級與學生的對應關系表
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" )),
)
# 班級與學生的對應關系表
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):
‘‘‘班級和課節對應表‘‘‘
__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):
"上課記錄"
__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,狀態:【%s】,成績:【%s】\33[0m" % ( self .class_m2m_lessons, self .students, self .status, self .score)
class Teacher(Base):
"講師"
__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 "講師:【%s】" % self .teacher_name
class Class(Base):
"班級"
__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 "班級名:【%s】" % self .class_name
class Student(Base):
"學生"
__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 "學生名:【%s】" % self .stu_name
class Lesson(Base):
"課節"
__tablename__ = "lesson"
lesson_id = Column(Integer, primary_key = True )
lesson_name = Column(String( 32 ), nullable = False , unique = True )
def __repr__( self ):
return "節次名:【%s】" % self .lesson_name
Base.metadata.create_all(engine)
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創建學習記錄以及修改學生成績:
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def add_studyrecord( self ):
‘‘‘添加學習記錄‘‘‘
class_name = input ( "\033[34;0m請輸入要添加學習記錄的班級名:\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: # 輸入的班級名存在且在屬於當前老師管理
lesson_name = input ( "\033[34;0m請輸入添加學習記錄的課節名(lesson):\033[0m" )
lesson_obj = self .session.query(Lesson).filter_by(lesson_name = lesson_name).first()
if lesson_obj: # 輸入的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: # 班級對應的課lesson表數據存在
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: # 上課記錄為創建
for student_obj in class_obj.students:
status = input ( "輸入學生 %s 的上課狀態(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系統錯誤:當前上課記錄已經創建\33[0m" )
else :
print ( "\33[31;1m系統錯誤:當前班級的lesson課節未創建\33[0m" )
else :
print ( "\33[31;1m系統錯誤:lesson未創建\33[0m" )
else :
print ( "\33[31;1m輸入錯誤:班級不存在或沒有權限管理此班級\33[0m" )
def modify_scores( self ):
‘‘‘修改成績‘‘‘
class_name = input ( "\033[34;0m請輸入學習記錄的班級名:\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: # 輸入的班級名存在且在屬於當前老師管理
lesson_name = input ( "\033[34;0m請輸入學習記錄的課節名(lesson):\033[0m" )
lesson_obj = self .session.query(Lesson).filter_by(lesson_name = lesson_name).first()
if lesson_obj: # 輸入的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: # 班級對應的課lesson表數據存在
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輸入要修改成績的學生名:[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: # 上課記錄存在
score = input ( "\033[34;0m輸入修改後的成績\33[0m" )
study_record_obj.score = score
self .session.commit()
else :
print ( "\33[31;1m系統錯誤:當前上課記錄已經創建\33[0m" )
else :
print ( "\33[31;1m系統錯誤:當前班級的lesson課節未創建\33[0m" )
else :
print ( "\33[31;1m系統錯誤:lesson未創建\33[0m" )
else :
print ( "\33[31;1m輸入錯誤:班級不存在或沒有權限管理此班級\33[0m" )
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上面的兩段代碼實現了主要的功能,其他的功能都是套路,都一樣。。。。
完整代碼地址--》》https://coding.net/u/James_Lian/p/Whaterver/git/tree/master
Python開發【項目】:學員管理系統(mysql)