django rest framework如何一次性序列化同一个数据库下多个model表数据在一个json页面下

在django项目中，首先我们要安装django-rest-mutiple-models

pip install django-rest-multiple-models

然后在setting配置中配置一下APP
INSTALLED_APPS = (
    ....
    'drf_multiple_model',
)

在我们的views视图函数下引入

from drf_multiple_model.views import ObjectMultipleModelAPIView

如下两个模型
class Play(models.Model):
    genre = models.CharField(max_length=100)
    title = models.CharField(max_length=200)
    pages = models.IntegerField()

class Poem(models.Model):
    title = models.CharField(max_length=200)
    style = models.CharField(max_length=100)
    lines = models.IntegerField()
    stanzas = models.IntegerField()

序列化如下

class PlaySerializer(serializers.ModelSerializer):
    class Meta:
        model = Play
        fields = ('genre','title','pages')

class PoemSerializer(serializers.ModelSerializer):
    class Meta:
        model = Poem
        fields = ('title','stanzas')

views中我们可以这么写，继承一个ObjectMutipleModelAPIView

from drf_multiple_model.views import ObjectMultipleModelAPIView

class TextAPIView(ObjectMultipleModelAPIView):
    querylist = [
        {'queryset': Play.objects.all(), 'serializer_class': PlaySerializer},
        {'queryset': Poem.objects.filter(style='Sonnet'), 'serializer_class': PoemSerializer},
        ....
    ]

如果我们使用的url是router，那这里我们就应该继承ObjectMutipleModelAPIViewset

具体的引入

from drf_multiple_model.viewsets import ObjectMultipleModelAPIViewSet

DRF页面的显示效果如下

{
    "Play" : [
        {"genre": "Comedy", "title": "A Midsummer Night"s Dream", "pages": 350},
        {"genre": "Tragedy", "title": "Romeo and Juliet", "pages": 300},
        ....
    ],
    "Poem" : [
        {"title": "Shall I compare thee to a summer"s day", "stanzas": 1},
        {"title": "As a decrepit father takes delight", "stanzas": 1},
        ....
    ],
}

效果就是能在一个json页面下序列化出多个不同的model数据

我们还可以对每个表的数据进行分页

from drf_multiple_model.pagination import MultipleModelLimitOffsetPagination

views下可以这么写

class LimitPagination(MultipleModelLimitOffsetPagination):

    default_limit = 10

意思是每个model默认显示前十条数据

如果前端需要，url上可以加上limit=5，自定义默认显示前五条数据

更多详细内容，github搜索DjangoRestMultipleModels