一、安装mysqlclient
网上看到很过通过命令:pip install mysqlclient 进行安装的教程,但是我却始终安装失败,遇到的错误千奇百怪,后来通过自己下载mysqlclient客户端终于安装成功;
首先打开网址:https://www.lfd.uci.edu/~gohlke/pythonlibs/#mysqlclient 并找到下面图中的内容部分:
根据自己的需要,我选择的是最下边的cp38(目测cp38应该是C++版本,下载下来的文件通过pip install 进行安装的时候会进行c++编译,如果你的电脑(我是Windows)上没有安装VC++,那么找个新版本的安装一下即可:https://support.microsoft.com/zh-cn/help/2977003/the-latest-supported-visual-c-downloads)记住如果没有C++,就先安装C++这个;
下载好mysqlclientt之后如下(只要下载1个,我系统是64位,所以先下载的64位的,结果用不了,所以又下载了32位的才成功,所以建议先下载32位的试试):
打开控制台(开始->运行->cmd):
第一步:cd 到下载的mysqlclient文件所在的目录:cd C:UsersYeatDownloadsmysqlclient
第二步:执行安装命令:pip install mysqlclient-1.4.4-cp38-cp38-win32.whl
如果成功的话会看到:
C:UsersYeatDownloads>pip install mysqlclient-1.4.4-cp38-cp38-win32.whl Processing c:usersyeatdownloadsmysqlclient-1.4.4-cp38-cp38-win32.whl Installing collected packages: mysqlclient Successfully installed mysqlclient-1.4.4 C:UsersYeatDownloads>
当然如果失败的话,那很可能看到类似下图的画面:
C:UsersYeat>pip install mysqlclient‑1.3.13‑cp36‑cp36m‑win_amd64.whl WARNING: Requirement 'mysqlclient‑1.3.13‑cp36‑cp36m‑win_amd64.whl' looks like a filename, but the file does not exist ERROR: mysqlclient‑1.3.13‑cp36‑cp36m‑win_amd64.whl is not a valid wheel filename. C:UsersYeat>pip install MySQL_python‑1.2.5‑cp27‑none‑win_amd64.whl WARNING: Requirement 'MySQL_python‑1.2.5‑cp27‑none‑win_amd64.whl' looks like a filename, but the file does not exist ERROR: MySQL_python‑1.2.5‑cp27‑none‑win_amd64.whl is not a valid wheel filename. C:UsersYeat>pip install MySQL_python‑1.2.5‑cp27‑none‑win_amd64 ERROR: Invalid requirement: 'MySQL_python‑1.2.5‑cp27‑none‑win_amd64' C:UsersYeat>cd C:UsersYeatDownloads C:UsersYeatDownloads>pip install MySQL_python-1.2.5-cp27-none-win_amd64.whl ERROR: MySQL_python-1.2.5-cp27-none-win_amd64.whl is not a supported wheel on this platform. C:UsersYeatDownloads>pip install mysqlclient-1.4.4-cp38-cp38-win_amd64.whl ERROR: mysqlclient-1.4.4-cp38-cp38-win_amd64.whl is not a supported wheel on this platform.
失败,那就换下载的mysqlclient版本,只能提供这个办法了!!!!
二、在Django框架里使用mysql
1.进入项目工程目录执行命令:django-admin startapp TcesApp,我的完整命令是:C:UsersYeatPycharmProjectsuntitled>django-admin startapp TcesApp,前面的部分是我的工程目录路径;
2.命令执行完毕后工程里会增加TcesApp目录如图:
3.进入models.py中创建与你的数据库表相对应的对象model,我的内容如下:
from django.db import models class e_exams(models.Model): ID = models.CharField(max_length=50), ExamName = models.CharField(max_length=50) ExamCode = models.CharField(max_length=50) SceneID = models.CharField(max_length=50) Creater = models.CharField(max_length=50) CreateTime = models.DateTimeField() State = models.CharField(max_length=50) Field_Char1 = models.CharField(max_length=50) Field_Char2 = models.CharField(max_length=50) Field_Char3 = models.CharField(max_length=50) class Meta: db_table = 'e_exams' #数据表名称
我的表结构 e_exams:
在models.py中可以创建过个表的model。
4.在admin.py中注册model:
from django.contrib import admin from . import models # Register your models here. admin.site.register(models.e_exams)
5.在setting.py中添加app名称(上边的名称 django-admin startapp TcesApp 的名称):
6.还是在settings.py中修改DATABASES内容如下:
完整配置:
DATABASES = { 'default': { 'ENGINE': 'django.db.backends.mysql', 'NAME': 'tces', 'USER': 'root', 'PASSWORD': 'Unity3du#d112233', 'HOST': 'nas.yeatsoft.com', 'PORT': '3306', 'OPTIONS': { "init_command": "SET sql_mode='STRICT_TRANS_TABLES'", } } }
其中NAME是你的数据库名称,HOST是数据库地址,其它的大家都知道。
7.接下来我们到views.py(或者自己创建的py文件)中编写代码主要看 addExam 这个方法:
from django.http import HttpResponse from django.shortcuts import render from TcesApp.models import e_exams def hello(request): return HttpResponse('home page!') def helloworld(request): context = {} context['value'] = 'hello world!' return render(request, 'helloworld.html', context) def addExam(request): exam = e_exams() exam.ID = '100001' exam.SceneID = '1001', exam.ExamName = '期末考试' exam.save() context = {} context['value'] = exam.ExamName + '数据添加成功!' return render(request,'helloworld.html',context)
其中helloworld.html是放在templates中的前端页面:
context['value']就是html页面中的{{value}}
8.到urls.py中添加路径完整代码如下:
from django.contrib import admin from django.urls import path from . import home urlpatterns = [ path('admin/', admin.site.urls), path('home/', home.hello), path('helloworld/', home.helloworld), path('add/',home.addExam) ]
三、运行效果如下:
结束!