項目需求:瀏覽器中訪問django后端某一條url(如:127.0.0.1:8080/index/)，實時朝數據庫中生成一千條數據並將生成的數據查詢出來，並展示到前端頁面
urls.py
from django.conf.urls import url from app01 import views urlpatterns = [ url(r'^get_book/',views.get_book) ]
models.py
from django.db import models class Book(models.Model): title = models.CharField(max_length=64)
views.py
from django.shortcuts import render, HttpResponse, redirect from app01 import models def get_book(request): # for循環插入1000條數據 for i in range(1000): models.Book.objects.create(name='第%s本書'%i) # 將插入的數據再查詢出來 book_queryset = models.Book.objcets.all() return render(request,'get_book.html',locals()) # 將查詢出來的數據傳遞給html頁面
template/get_book.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script> {% load static %} <link rel="stylesheet" href="{% static 'bootstrap-3.3.7-dist/css/bootstrap.min.css' %}"> <link rel="stylesheet" href="{% static 'dist/sweetalert.css' %}"> <script src="{% static 'bootstrap-3.3.7-dist/js/bootstrap.min.js' %}"></script> <script src="{% static 'dist/sweetalert.min.js' %}"></script> </head> <body> <div class="container"> <div class="row"> <div class="col-md-8 col-md-offset-2"> {% for book in book_queryset %} <p>{{ book.title }}</p> {% endfor %} </div> </div> </div> </body> </html>
bulk_create方法
將views.py中原先的視圖函數稍作變化
def book(request): l = [] for i in range(10000): l.append(models.Book(title='第%s本書'%i)) models.Book.objects.bulk_create(l) # 批量插入數據 return render(request,'booklist.html',locals())
代碼修改完畢之后其他地方無需改動，重啟django項目瀏覽器重新訪問，你會立馬發現數據量增大十倍的情況下頁面出現的速度居然還比上面的版本要快上速度倍
bulk_create方法是django orm特地提供給我們的方便批量操作數據庫的方式，效率非常高