标签：mod ace userinfo rate self use 配置 对象 inf
model。py
from django.db import models class UserType(models.Model): title = models.CharField(max_length=32) class UserInfo(models.Model): name = models.CharField(max_length=64) email = models.CharField(max_length=64) ut = models.ForeignKey(to=‘UserType‘)
命令
python3 manage.py makemigrations # 指定到db1 数据库里面生成表结构 python3 manage.py migrate app01 --database=db1
方式一：手动
view。py
from django.shortcuts import render,HttpResponse from app01 import models def index(request): models.UserType.objects.using(‘db1‘).create(title=‘普通用户‘) # 手动指定去某个数据库取数据 result = models.UserType.objects.all().using(‘db1‘) print(result) return HttpResponse(‘...‘)
注意：
models.UserType.objects 取出来是一个queryset对象
自动：添加配置文件 （读写分离）
class Router1:
# 指定到某个数据库取数据 def db_for_read(self, model, **hints): """ Attempts to read auth models go to auth_db. """ if model._meta.model_name == ‘usertype‘: return ‘db1‘ else: return ‘default‘ # 指定到某个数据库存数据 def db_for_write(self, model, **hints): """ Attempts to write auth models go to auth_db. """ return ‘default‘
再写上配置
DATABASES = { ‘default‘: { ‘ENGINE‘: ‘django.db.backends.sqlite3‘, ‘NAME‘: os.path.join(BASE_DIR, ‘db.sqlite3‘), }, ‘db1‘: { ‘ENGINE‘: ‘django.db.backends.sqlite3‘, ‘NAME‘: os.path.join(BASE_DIR, ‘db.sqlite3‘), } } DATABASE_ROUTERS = [‘db_router.Router1‘,]
class Router1: def allow_migrate(self, db, app_label, model_name=None, **hints): """ All non-auth models end up in this pool. """
# 对数据库迁移也做了约束 if db==‘db1‘ and app_label == ‘app02‘: return True elif db == ‘default‘ and app_label == ‘app01‘: return True else: return False def db_for_read(self, model, **hints): """ Attempts to read auth models go to auth_db. """ if model._meta.app_label == ‘app01‘: return ‘default‘ else: return ‘db1‘ def db_for_write(self, model, **hints): """ Attempts to write auth models go to auth_db. """ if model._meta.app_label == ‘app01‘: return ‘default‘ else: return ‘db1‘
标签：mod ace userinfo rate self use 配置 对象 inf
原文地址：https://www.cnblogs.com/jassin-du/p/9052841.html
