Question

我想使用Django Rest Framework来应用分页。我有以下GET视图。

def get(self,request,format=None):
    response_data = []
    status = request.GET.getlist('status') or None
    location = request.GET.getlist('location') or None
    category = request.GET.getlist('category') or None
    min_price = request.GET.get('min_price') or None
    max_price = request.GET.get('max_price') or None

    ModelA_obj = Model.objects.all()
    if status : ModelA_obj = ModelA_obj.filter(status__in=status)
    if location : ModelA_obj = ModelA_obj.filter(location__in=location)
    if min_price : ModelA_obj = ModelA_obj.filter(minimum_expected_price__gte=int(min_price))
    if max_price : ModelA_obj = ModelA_obj.filter(buyout_price__lte=int(max_price))
    if category : 
        category_List = ModelB.objects.filter(subcategory__name__in=category).values_list('column',flat=True)
        ModelA_obj = ModelA_obj.filter(id__in=category_List)

    for obj in ModelA_obj:
        #this fetches me all the details from different models
        details = ModelA.get_details(obj) 
        response_data.append(details)
    return Response(response_data)

如何对数据进行分页？目前它返回所有数据。我已经阅读了API文档以及SO上的各种线程，因此我在settings.py中应用了以下内容

REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': (
        'rest_framework.authentication.TokenAuthentication',
    ),

    #'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
    #'PAGE_SIZE': 2,
    'PAGINATE_BY': 1, 
    'PAGINATE_BY_PARAM': 'page' 

}

但似乎没有任何效果。我的网址是http://127.0.0.1:8000/post/?page=1，我目前有5-6条记录，因此我将PAGE_SIZE设置为1，但仍然没有按预期工作。如何对数据记录进行分页？

修改

以下是我的模特

class ModelA(models.Model):
    col1 = models.CharField(max_length=255)
    Col2 = models.TextField(blank=True,null=True)
    def get_details(obj):
        #get data from ModelB and ModelC referenced with FK `obj`


class ModelB(models.Model):
    col3 = models.CharField(max_length=255)
    fk_A = models.ForeignKEy(ModelA)


class ModelC(models.Model):
    col4 = models.CharField(max_length=255)
    fk_A = models.ForeignKEy(ModelA)

预期回复

{
        "col1": value,
        "col2": value,
        "modelb_details": [col3_value1, col3_value2....],
        "modelc_details": [col4_value1, col4_value2....],
},
{
        "col1": value,
        "col2": value,
        "modelb_details": [col3_value1, col3_value2....],
        "modelc_details": [col4_value1, col4_value2....],
}

Answer 1

取消注释设置中的两行代码

'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
'PAGE_SIZE': 2,

修改

在序列化程序中

class ModelASerializer(serializers.ModelSerializer): modelb_details=ModelBSerializer(source="model_b") modelc_details=ModelCSerializer(source="model_c") class Meta: model = ModelA class ModelBSerializer(serializers.ModelSerializer): class Meta: model = ModelB fields = ('col3',) class ModelCSerializer(serializers.ModelSerializer): class Meta: model = ModelC fields = ('col4',)

在视图中

response_data = ModelASerializer(objs).data

*其中objs是ModelA的查询集

Django Rest框架中的分页

1 个答案:

在序列化程序中

在视图中