本文实例为大家分享了Django实现学员管理系统的具体代码,供大家参考,具体内容如下
要求:实现数据的增删改查功能,并同步至数据库中。此项目实现了前端以及后端的结合。
(1) 先在settings里配置static(存放的是css样式、js代码、以及imgs),可以加在文件末尾
STATIC_URL = '/static/'
STATICFILES_DIRS = [
os.path.join(BASE_DIR, 'static')
]
(2) 首先,新建一个django项目,在项目下的urls.py文件里,配置跳转路由,跳转到首页
urls.py
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'))
]
(3) 通过python manage.py startapp student命令创建一个student的app(不要忘记在settings中配置一下),并在models.py下执行mysql操作,在这里我们就直接在数据库里手动创建表,不再使用sql语句创建表了
models.py
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()
(4) 接下来在自己新建的app下,再手动创建一个urls.py文件,用来配置具体路由,并在views.py文件里实现视图函数(存放具体的增删改查功能的函数)
student/urls.py
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'),
]
student/views.py
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!')
(5) 最后就是在html代码中实现路由跳转,实现功能
首页html,index.html
{% load static %}
.navbar {
border-radius: 0px;
margin-bottom: 0;
}
.titleContent {
background-color: #eeeeee;
}
.mToolbar {
padding-top: 10px;
padding-bottom: 10px;
}
.container-fluid {
padding-left: 8vw;
}
@media (max-width:768px) {
.container-fluid {
padding-left: 15px;
}
}
.form-horizontal .control-label{
text-align: left;
}
姓名学号电话编辑删除
{% for stu in students %}
{ { stu.s_name }}{ { stu.s_id }}{ { stu.s_phone }}{% endfor %}
增加 / 修改学员页面,modif.html
修改学员信息-{ { stu.s_name }}.smart-green {
margin-left: auto;
margin-right: auto;
max-width: 500px;
background: #F8F8F8;
padding: 30px 30px 20px 30px;
font: 12px Arial, Helvetica, sans-serif;
color: #666;
border-radius: 5px;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
}
.smart-green h1 {
font: 24px "Trebuchet MS", Arial, Helvetica, sans-serif;
padding: 20px 0px 20px 40px;
display: block;
margin: -30px -30px 10px -30px;
color: #FFF;
background: #9DC45F;
text-shadow: 1px 1px 1px #949494;
border-radius: 5px 5px 0px 0px;
-webkit-border-radius: 5px 5px 0px 0px;
-moz-border-radius: 5px 5px 0px 0px;
border-bottom: 1px solid #89AF4C;
}
.smart-green h1 > span {
display: block;
font-size: 11px;
color: #FFF;
}
.smart-green label {
display: block;
margin: 0px 0px 5px;
}
.smart-green label > span {
float: left;
margin-top: 10px;
color: #5E5E5E;
}
.smart-green input[type="text"], .smart-green input[type="email"], .smart-green textarea, .smart-green select {
color: #555;
height: 30px;
line-height: 15px;
width: 100%;
padding: 0px 0px 0px 10px;
margin-top: 2px;
border: 1px solid #E5E5E5;
background: #FBFBFB;
outline: 0;
-webkit-box-shadow: inset 1px 1px 2px rgba(238, 238, 238, 0.2);
box-shadow: inset 1px 1px 2px rgba(238, 238, 238, 0.2);
font: normal 14px/14px Arial, Helvetica, sans-serif;
}
.smart-green textarea {
height: 100px;
padding-top: 10px;
}
.smart-green .button {
background-color: #9DC45F;
border-radius: 5px;
-webkit-border-radius: 5px;
-moz-border-border-radius: 5px;
border: none;
padding: 10px 25px 10px 25px;
color: #FFF;
text-shadow: 1px 1px 1px #949494;
}
.smart-green .button:hover {
background-color: #80A24A;
}
.error-msg{
color: red;
margin-top: 10px;
}
.success-msg{
color: #80A24A;
margin-top: 10px;
margin-bottom: 10px;
}
{% csrf_token %}
请输入修改后的信息.
姓名 :
电话 :
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。