• Python Django mysqlclient安装和使用


    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!

  • 相关阅读:
    MasterPage里使用TreeView保存状态功能
    JavaScript 如何将字符串转换为数值
    asp.net 样式GridView CSS的完整样式表
    CSS Frames LayoutsCSS框架
    Fix: .Net 2.0 or 3.5 Setup Project Requires .Net Framework version 4.0
    Design Pattern Resources
    Agile Method
    The Art of Debugging
    WPF Control Layout
    Getting Started With Setup Projects
  • 原文地址:https://www.cnblogs.com/mr-yoatl/p/11756810.html
Copyright © 2020-2023  润新知