STATIC_URL = '/static/'
STATICFILES_DIRS = [
 os.path.join(BASE_DIR, 'static')
]

from django.conf.urls import url, include
from django.contrib import admin
 
urlpatterns = [
 url(r'^admin/', admin.site.urls),
 url(r'^student/', include('student.urls'))
]

import pymysql
# Create your models here.
 
# 管理数据库
class DBManager(object):
 
 @classmethod
 def open_sql(cls):
  conn = pymysql.connect(
   host='127.0.0.1',
   port=3306,
   db='students',
   user='root',
   password='123456',
   use_unicode=True,
   charset='utf8'
  )
  DBManager.conn = conn
  DBManager.cursor = conn.cursor()
 
 @classmethod
 def close_sql(cls):
  DBManager.conn.commit()
  DBManager.cursor.close()
  DBManager.conn.close()
 
# 数据模型类
class StudnetModel(object):
 
 def __init__(self, s_id, s_name, s_phone):
  self.s_id = s_id
  self.s_name = s_name
  self.s_phone = s_phone
  self.table = 'students'
 
 def save(self):
  """
  保存数据模型到数据库
  :return: False 表示数据已存在 True表示保存数据成功
  """
  DBManager.open_sql()
  # 如果s_id已存在，说明学号已存在
  sql = f'SELECT * FROM students WHERE s_id={self.s_id}'
  if DBManager.cursor.execute(sql) > 0:
   # 数据已存在，插入失败
   return False
  else:
   # 插入数据
   sql = 'INSERT INTO students(s_id,s_name,s_phone)VALUES(%s,%s,%s)'
   DBManager.cursor.execute(sql,(self.s_id, self.s_name, self.s_phone))
   DBManager.close_sql()
   return True
 
 @classmethod
 def delete(cls, s_id):
  """
  根据s_id删除数据
  :param s_id: 要删除数据的id
  :return: False表示该数据不存在 True删除成功
  """
  DBManager.open_sql()
 
  # 删除的sql语句
  sql = f'DELETE FROM students WHERE s_id={s_id}'
  DBManager.cursor.execute(sql)
 
  # rowcount 执行sql语句 影响的数据条数
  if DBManager.cursor.rowcount > 0:
   DBManager.close_sql()
 
   return True
  else:
   return False
 
 @classmethod
 def object_with_id(cls, s_id):
 
  DBManager.open_sql()
  sql = f'SELECT * FROM students WHERE s_id={s_id}'
  DBManager.cursor.execute(sql)
  # 取出拿到的数据
  result = DBManager.cursor.fetchone()
  DBManager.close_sql()
  if result:
   # 返回StudentModel对象
   return cls(result[0], result[1], result[2], )
 
 def modify(self):
 
  DBManager.open_sql()
 
  sql = f"UPDATE students SET s_name='{self.s_name}' , s_phone='{self.s_phone}' WHERE s_id={self.s_id}"
 
  DBManager.cursor.execute(sql)
  if DBManager.cursor.rowcount > 0:
   DBManager.close_sql()
   return True
  else:
   return False
 
 @classmethod
 def objects(cls):
  # 只要调用该函数，返回数据库中所有的数据
  DBManager.open_sql()
  sql = 'SELECT * FROM students'
  DBManager.cursor.execute(sql)
  # 取出查询的所有数据,results是一个大元组
  results = DBManager.cursor.fetchall()
  # 将results中每一个小元组转换为StudentModel对象
  students = map(lambda t:cls(t[0], t[1], t[2]), results)
  # 关闭数据库
  DBManager.close_sql()
 
  return students
 
if __name__ == '__main__':
 
 StudnetModel.objects()

from django.conf.urls import url
from .views import *
 
urlpatterns = [
 url(r'^$', student_index, name='stu_index'),
 url(r'^modify/(?P\d+)/$', student_modify, name='modify'),
 url(r'^addstu/$', student_add, name='addstu'),
 url(r'^delstu/(?P\d+)/$', student_del, name='delstu'),
]

from django.shortcuts import render, redirect
from django.http import HttpResponse
 
from .models import StudnetModel
# Create your views here.
 
def student_index(reqeust):
 
 # 取出数据库中所有的数据
 students = StudnetModel.objects()
 
 return render(reqeust, 'index.html', {'students': students})
 
 
def student_add(request):
 
 if request.method == 'POST':
 
  # 取出数据
  s_id = request.POST.get('id', None)
  s_name = request.POST.get('name', None)
  s_phone = request.POST.get('phone', None)
 
  if s_id and s_name and s_phone:
   try:
    int(s_id)
   except Exception as e:
    return HttpResponse('id必须是纯数字！')
   # 创建数据模型对象
   stu = StudnetModel(s_id, s_name, s_phone)
   # 保存数据
   if stu.save():
    # 重定向到首页
    return redirect('/student')
   else:
    # 返回提示信息
    return HttpResponse('该学号已存在！')
  else:
   return HttpResponse('添加信息不能为空！')
 else:
  # 其他访问方式，重定向到主页
  return redirect('/student')
 
 
def student_del(request, s_id):
 
 if request.method == 'GET':
  # MTV设计模式
  # 根据id判断是否存在
 
  if StudnetModel.delete(s_id):
   # 删除成功
   return redirect('/student')
  else:
   # 删除数据不存在
   return HttpResponse('要删除的数据不存在！')
 
 
def student_modify(request, s_id):
 
 if request.method == 'GET':
 
  # 根据s_id 查询这个id对应的信息
  stu = StudnetModel.object_with_id(s_id)
  if stu:
   return render(request, 'modify.html', {'stu': stu})
  else:
 
   return HttpResponse('要修改的学员id不存在！！')
 elif request.method == 'POST':
 
  # 取出修改后的参数
  s_name = request.POST.get('name')
  s_phone = request.POST.get('phone')
  stu = StudnetModel(s_id, s_name, s_phone)
  if stu.modify():
 
   return redirect('/student')
  else:
 
   return HttpResponse('修改失败，请稍后重试！')

{% load static %}


 

 
 
 
 
 
 
 

 

 
 
 
 
 

  
学员查询及管理
 
 
 

  添加
 
 
 
 
 

  

   

    

     ×
     
搜索条件
    
    

     
 
     

      

       姓名
       

        
       
      
      

       学号
       

        
       
      
      {% csrf_token %}
      

       电话
       

        
       
      
 
      

     提交
    
      
     
 
 
 
    
 
   
   
  
  
 
 
 
 

  

   
       {% for stu in students %}
       
       {% endfor %}
      

    

     

      
姓名
      
学号
      
电话
      
编辑
      
删除
      

        
{{ stu.s_name }}
        
{{ stu.s_id }}
        
{{ stu.s_phone }}
 
        

 
        

       
     
    
   
  
 
 
 
 
 
 

 

 


 
 
 
 



 {% csrf_token %}
 
修改学员信息-{{ stu.s_name }}
  请输入修改后的信息.
 
 
  姓名 :
  
  

 
 
 
  电话 :