昨日回顾:
1 ajax 什么是ajax:异步的JavaScript 和xml
2 特点:异步,局部刷新
3 简单的与后台交互:(携带数据:可以拼到url上---->从GET中取,)
$.ajax({
url:请求的地址,
type:请求方式,(post,get....)
//contentType:'application/json',(默认:urlencoded)
data:{},往后台发送的数据
success:function (data){
//data的数据类型,不一定
//异步的,成功返回,才能回调
}
})
-携带数据:
-可以拼到url上---->从GET中取
-默认urlencoded编码和formdata,放到data中的数据,------>POST
今日内容:
分页器:
-干啥的?数据量大的话,可以分页获取,查看
基本写法:
后端:
-总数据拿出来
-生成分页器Paginator对象(对象里有属性和方法)
-生成当前页的对象,current_page=paginator.page(当前页码)
-取出前台传过来的页码,current_page_num = int(request.GET.get('page'))
-需要有异常捕获
-捕获到,把当前页码设置成第一页
-干啥的?数据量大的话,可以分页获取,查看
基本写法:
后端:
-总数据拿出来
-生成分页器Paginator对象(对象里有属性和方法)
-生成当前页的对象,current_page=paginator.page(当前页码)
-取出前台传过来的页码,current_page_num = int(request.GET.get('page'))
-需要有异常捕获
-捕获到,把当前页码设置成第一页
def manypage(request): try: page = int(request.GET.get('p')) books = models.Book.objects.all() paginator = Paginator(books, 10) current_page = paginator.page(page) if paginator.num_pages > 11: if page - 5 < 1: page_range = range(1, 12) elif page + 5 > paginator.num_pages: page_range = range(paginator.num_pages - 10, paginator.num_pages + 1) else: page_range = range(page - 5, page + 6) else: page_range = paginator.page_range except Exception as e: page = 1 current_page = paginator.page(page) page_range = range(1, 12) return render(request, 'manypage.html', locals())
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>index</title> <script src="/static/jquery-3.3.1.js"></script> <link rel="stylesheet" href="/static/bootstrap-3.3.7-dist/css/bootstrap.min.css"> </head> <body> <div class="col-md-offset-3 col-md-6"> <table class="table table-striped"> <thead> <tr> <th>书名</th> <th>价格</th> </tr> </thead> <tbody> {% for book in current_page %} <tr> <td>{{ book.name }}</td> <td>{{ book.price }}</td> </tr> {% endfor %} </tbody> </table> <nav aria-label="Page navigation"> <ul class="pagination"> {% if current_page.has_previous %} <li> <a href="?p={{ current_page.previous_page_number }}" aria-label="Previous"> <span aria-hidden="true">上一页</span> </a> </li> {% else %} <li class="disabled"> <a href="#" aria-label="Previous"> <span aria-hidden="true">上一页</span> </a> </li> {% endif %} {% for num in page_range %} {% if num == page %} <li class="active"><a href="?p={{ num }}">{{ num }}</a></li> {% else %} <li><a href="?p={{ num }}">{{ num }}</a></li> {% endif %} {% endfor %} {% if current_page.has_next %} <li> <a href="?p={{ current_page.next_page_number }}" aria-label="Next"> <span aria-hidden="true">下一页</span> </a> </li> {% else %} <li class="disabled"> <a href="#" aria-label="Next"> <span aria-hidden="true">下一页</span> </a> </li> {% endif %} </ul> </nav> </div> </body> </html>
-models.Book.objects.bulk_create(ll)