day87
分页器
PageNumberPagination(普通分页器)
说明:
配置分页器的中最大显示个数(也可在setting中做全局配置)
page.page_size = 2
REST_FRAMEWORK = {
# 每页显示两条
'PAGE_SIZE': 2,
}
配置地址栏中的地址(http://127.0.0.1:8001/books/?page=2)对应最后的page
page.page_query_param = 'page'
指定当前页显示多少条
page.page_size_query_param = 'size'
限制最大页数
page.max_page_size = 6
class Book(ViewSetMixin, APIView):
def get_all(self, request):
db_books = models.Books.objects.all()
page = PageNumberPagination()
page.page_size = 2
page.page_query_param = 'page'
page.page_size_query_param = 'size'
page.max_page_size = 6
book_page = page.paginate_queryset(db_books, request, view=self)
books_ser = myser.BookSerializers(book_page, many=True)
return Response(books_ser.data)
LimitOffsetPagination(偏移分页器)
说明:
每页显示的条数
default_limit = api_settings.PAGE_SIZE
标杆值
offset_query_param = 'offset'
往后偏移多少
limit_query_param = 'limit'
每页显示最大的条数
max_limit = None
注:要取的条数,如果超过了,还剩多少,就显示多少
from rest_framework.pagination import LimitOffsetPagination class Book(ViewSetMixin, APIView):
def get_all(self, request):
db_books = models.Books.objects.all()
page = LimitOffsetPagination()
page.default_limit = 3
page.offset_query_param = 'offset'
page.max_limit = 3
book_page = page.paginate_queryset(db_books, request, view=self)
books_ser = myser.BookSerializers(book_page, many=True)
return Response(books_ser.data)
CursorPagination(加密分页器-查询速度很快)
说明:
按id排序
page.ordering = 'nid'
查询的key值
cursor_query_param = 'cursor'
每页显示多少条
page_size = api_setting.PAGE_SIZE
class Book(ViewSetMixin, APIView):
def get_all(self, request):
db_books = models.Books.objects.all()
page = CursorPagination()
# 设置根据数据库中哪个字段排序
page.ordering = 'id'
book_page = page.paginate_queryset(db_books, request, view=self)
books_ser = myser.BookSerializers(book_page, many=True)
# return Response(books_ser.data)
return page.get_paginated_response(books_ser.data)
使用总结:
生成一个对象普通,偏移,加密)
***重点:可以修改对象的属性
-ret = 对象.paginate_queryset(book_list,request,self)
-丢到序列化类中,完成序列化
-最后返回
版本控制
基于url的正则方式:URLPathVersioning(/v1/users/)
基于url的get传参方式:QueryParameterVersioning(users?version=v1)
基于 accept 请求头方式:AcceptHeaderVersioning(Accept: application/json; version=1.0)
局部使用:
versioning_class = URLPathVersioning
全局使用:
REST_FRAMEWORK = {
'DEFAULT_VERSIONING_CLASS':'rest_framework.versioning.QueryParameterVersioning',
'DEFAULT_VERSION': 'v1', # 默认版本(从request对象里取不到,显示的默认值)
'ALLOWED_VERSIONS': ['v1', 'v2'], # 允许的版本
'VERSION_PARAM': 'version' # URL中获取值的key
}
URLPathVersioning示例
路由配置:
urlpatterns = [
url(r'^(?P<version>[v1|v2]+)/books/', views.Book.as_view({'get': 'get_all'}), name='ttt'),
]
视图函数:
from rest_framework.versioning import URLPathVersioning class Book(ViewSetMixin, APIView):
versioning_class = URLPathVersioning
def get_all(self, request, version):
db_books = models.Books.objects.all()
print(request.version)
reverse_url = request.versioning_scheme.reverse('ttt', request=request)
print(reverse_url)
page = PageNumberPagination()
page.max_page_size = 6
book_page = page.paginate_queryset(db_books, request, view=self)
books_ser = myser.BookSerializers(book_page, many=True)
return page.get_paginated_response(books_ser.data)
最新文章
- HTML5滑动(swipe)事件
- yii2 输出xml格式数据
- Web前端代码规范与页面布局
- hash_map map
- android开发之service详解
- linux系统巡检脚本shell实例
- MEF初体验之三:Exports声明
- .NET Core2.0 MVC中使用EF访问数据
- java使用Websocket获取HttpSession出现的问题与解决
- [ExtJS5学习笔记]第二十九节 sencha ext js 5.1.0中动态更换皮肤主题
- CF1093F Vasya and Array
- Java使用BigDecimal计算保留位数不对问题定位
- Shell 常见理论问答
- css font-family属性设置中文字体乱码
- php开发中应该注意的错误开关与常见处理[开发篇]
- LintCode: Identical Binary Tree
- web.xml中context-param详解
- ORACEL 创建表空间
- Java转python第二天
- 【system.date】使用说明