一、超链接API

目前我们的API中的关系是用主键表示的。我们将通过使用超链接来提高我们API的内部联系。

1. 新建一张表(模型类)

class Book(models.Model):
    title = models.CharField(max_length=32, verbose_name='书名')
    publisher = models.ForeignKey('Publisher')

    def __str__(self):
        return self.title

    class Meta:
        verbose_name = '书'
        verbose_name_plural = verbose_name

2. 生成迁移文件和执行迁移

3. 创建书的序列化

class BookSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.Book
        fields = (
            'id',
            'title',
            'publisher'
        )

4. 编写Book相关视图

class BookList(generics.ListCreateAPIView):
    queryset = Book.objects.all()
    serializer_class = serializers.BookSerializer
    permission_classes = (permissions.IsAuthenticated,)


class BookDetail(generics.RetrieveUpdateDestroyAPIView):
    queryset = Book.objects.all()
    serializer_class = serializers.BookSerializer
    permission_classes = (permissions.IsAuthenticated)

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5. 增加新的路由

    url(r'^books/$',views.BookList.as_view()),
    url(r'^books/(?P<pk>[0-9]+)/$',views.BookDetail.as_view())

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• 没数据

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6. 增加几条数据

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7. 通过外键重写显示字段转化为字符串(StringRelatedField)

publisher = serializers.StringRelatedField(source='publisher.name')

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8.设置超链接

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• 解决报错

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二、浏览API

1. 导入模块

from rest_framework.reverse import reverse

2. 编写视图函数

@api_view(['GET'])
def api_root(request, format=None):
    return Response(
        {
            'publishers': reverse('publisher-list', request=request, format=format),
            'books': reverse('books_list', request=request, format=format)
        }
    )

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3. 在app下面单独创建一个urls

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from django.conf.urls import url, include
from app01 import views


urlpatterns = [

    url(r'^publishers/$', views.PublisherList.as_view(), name='publisher-list'),
    url(r'^publishers/(?P<pk>[0-9]+)/$', views.PublisherDetail.as_view(), name='publisher-detail'),
    url(r'^api-auth/', include('rest_framework.urls', namespace='rest-framework')),
    url(r'^books/$', views.BookList.as_view(), name='books_list'),
    url(r'^books/(?P<pk>[0-9]+)/$', views.BookDetail.as_view(), name='books-detail')

]

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• 刷新浏览器，展示所有api

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三、分页

设置分页样式

'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.LimitOffsetPagination',

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