django连接数据库获取数据的简单步骤记录

django-admin startproject myweb

python manage.py startapp myapp

python manage.py runserver

python manage.py runserver 0.0.0.0:8080

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'mydemo',
        'USER': 'root',
        'PASSWORD': '',
        'HOST': 'localhost',
        'PORT': '3306',
    }
}

pip install  mysqlclient

```python
from django.db import models

# Create your models here.

class Stu(models.Model):
    '''自定义Stu表对应的Model类'''
    #定义属性：默认主键自增id字段可不写
    id = models.AutoField(primary_key=True)
    name = models.CharField(max_length=16)
    age = models.SmallIntegerField()
    sex = models.CharField(max_length=1)
    classid=models.CharField(max_length=8)

    # 定义默认输出格式
    def __str__(self):
        return "%d:%s:%d:%s:%s"%(self.id,self.name,self.age,self.sex,self.classid)

    # 自定义对应的表名，默认表名：myapp_stu
    class Meta:
        db_table="stu"

编辑myweb/settings.py文件，并将该虚线路径添加到该INSTALLED_APPS设置。

INSTALLED_APPS  =  [ 
    'django.contrib.admin' ，
    'django.contrib.auth' ，
    'django.contrib.contenttypes' ，
    'django.contrib.sessions' ，
    'django.contrib.messages' ，
    'django.contrib.staticfiles' ，
    'myapp.apps.MyappConfig',  #或者直接写 myapp
]

# 文件：myapp/views.py 文件代码

from django.shortcuts import render
from django.http  import HttpResponse
from myapp.models import Stu
# Create your views here.

def index(request):
    return HttpResponse("Hello Django!")

def stu(request):
    #获取所有stu表信息
    lists = Stu.objects.all()
    print(lists)
    #获取单条学生信息
    print(Stu.objects.get(id=1))

    return HttpResponse("ok")

#在myapp/urls.py文件中配置

path('stu/', views.stu),

python manage.py runserver

http://127.0.0.1:8088/myapp/stu/