2、请求和响应

 3、连接数据库

"""
Django settings for djangoProject project.

Generated by 'django-admin startproject' using Django 4.0.5.

For more information on this file, see
https://docs.djangoproject.com/en/4.0/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/4.0/ref/settings/
"""
import os.path
import sys
from pathlib import Path

# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent

sys.path.insert(0,os.path.join(BASE_DIR,'djangoProject'))

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/4.0/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'django-insecure-5k74wm#*nw^ezl(9!pk(-tr&^jzw_8e2v2zar-xch1!#5p*-%!'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'app01.apps.App01Config'
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'djangoProject.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [BASE_DIR / 'templates']
        ,
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'djangoProject.wsgi.application'


# Database
# https://docs.djangoproject.com/en/4.0/ref/settings/#databases

# DATABASES = {
#     'default': {
#         'ENGINE': 'django.db.backends.sqlite3',
#         'NAME': BASE_DIR / 'db.sqlite3',
#     }
# }
DATABASES={
    'default':{
        'EIGINE':'django.db.backends.mysql',
        'NAME':'app01',
        'USER':'root',
        'PASSWORD':'123456789',
        'HOST':'127.0.0.1',
        'PORT':3306
    }
}

# Password validation
# https://docs.djangoproject.com/en/4.0/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/4.0/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/4.0/howto/static-files/

STATIC_URL = 'static/'

# Default primary key field type
# https://docs.djangoproject.com/en/4.0/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

 

from django.db import models

# Create your models here.
class UserInfo(models.Model):
    name=models.CharField(max_length=255)
    data=models.CharField(max_length=255)
    country = models.CharField(max_length=255)
    type = models.CharField(max_length=255)
    time = models.CharField(max_length=255)
    score = models.DecimalField(blank=True, null=True, max_digits=15, decimal_places=3)
    numOfRaters = models.IntegerField()

 4、生成迁移文件

from django.db import models

# Create your models here.
class UserInfo(models.Model):
    name=models.CharField(max_length=255)
    data=models.CharField(max_length=255)
    country = models.CharField(max_length=255)
    type = models.CharField(max_length=255)
    time = models.CharField(max_length=255)
    score = models.DecimalField(blank=True, null=True, max_digits=15, decimal_places=3)
    numOfRaters = models.IntegerField()

from django.db import models
# Create your models here.
这个类会对应数据库中的⼀个表
#
不指定主键，会⾃动⽣成⼀个主键
class Grades(models.Model):#
    gname = models.CharField(max_length=20)
    gdate = models.DateTimeField()
    ggirlnum = models.IntegerField()
    gboynum = models.IntegerField()
    isDelete = models.BooleanField(default=False)
def__str__(self):
return"%s"%(self.gname)
class Students(models.Model):
    sname = models.CharField(max_length=20)
男：
    sgender = models.BooleanField(default=True)#
True,
    sage = models.IntegerField()
    scontend = models.CharField(max_length=20)
：不删除
    isDelete = models.BooleanField(default=False)#False
关联外键
#
关联外键，关联前⾯班级类
    sgrade = models.ForeignKey("Grades")#
def__str__(self):
return self.sname

python manage.py makemigration

PyCharm查看⽣成的迁移⽂

 

 数据库中展⽰⽣成的表

 8、生成迁移文件

 通过数据库查看⽣成的与models.py⽂件中⼀⼀对应的数据表