Django rest框架发送带单引号的字符串而不是带双引号的JSON

我正在通过POST发送JSON到视图。我得到的响应仅是JSON的一部分，其余部分已从双引号更改为单引号。

我的问题是如何确保将所有这些作为JSON发送回去？作为我的问题的额外奖励，我不知道会将哪些字段发送给承租人。

POST看起来像：

{"leasee":
{"profession":{"permanentMakeup":true,"esthetician":true,"hairStylist":true},
"compare":{"uniqueVsChic":"56"},
"name":"dfasdfasdf",
"contact":{"text":true,"facebook":true}}}

但是GET给了我：

{"leasee":
"{'compare': {'uniqueVsChic': '56'}, 
'profession': {'hairStylist':True, 
'esthetician': True, 
'permanentMakeup': True}, 
'name':'dfasdfasdf', 
'contact':{'facebook': True,'text': True}}",
"created_at":"2015-05-22T23:27:13.598686Z",
"updated_at":"2015-05-22T23:27:13.609893Z"}

我的views.py：

from rest_framework import viewsets
from sitepages.models import SalonSubmission, StylistSubmission
from sitepages.serializers import SalonSerializer, StylistSerializer
from django.db.models.signals import post_save
from django.core.mail import send_mail
from django.dispatch import receiver


class SalonViewSet(viewsets.ModelViewSet):
    queryset = SalonSubmission.objects.order_by('-created_at')
    serializer_class = SalonSerializer

    def perform_create(self, serializer):
        instance = serializer.save()
        post_save.send(sender=self.__class__, name=instance.business_name, phone=instance.phone)
        return super(SalonViewSet, self).perform_create(serializer)


class StylistViewSet(viewsets.ModelViewSet):
    queryset = StylistSubmission.objects.order_by('-created_at')
    serializer_class = StylistSerializer

    def perform_create(self, serializer):
        instance = serializer.save()
        post_save.send(sender=self.__class__, stylist=instance.leasee)
        return super(StylistViewSet, self).perform_create(serializer)


@receiver(post_save, sender=SalonViewSet)
def send_email(sender, **kwargs):
    send_mail(kwargs['name'], kwargs['phone'], '[email protected]',
              ['[email protected]'], fail_silently=False)


@receiver(post_save, sender=StylistViewSet)
def send_email(sender, **kwargs):
    send_mail('aName', kwargs['stylist'], '[email protected]',
              ['[email protected]'], fail_silently=False)

我的serializers.py：

from rest_framework import serializers
from sitepages.models import SalonSubmission, StylistSubmission


class SalonSerializer(serializers.ModelSerializer):
    class Meta:
        model = SalonSubmission

        fields = ('business_name', 'phone', 'created_at', 'updated_at')
        read_only_fields = ('created_at', 'updated_at')


class StylistSerializer(serializers.ModelSerializer):
    class Meta:
        model = StylistSubmission
        fields = (
            'leasee',
            'created_at',
            'updated_at'
        )
        read_only_fields = ('created_at', 'updated_at')

我的models.py：

从django.db导入模型

class SalonSubmission(models.Model):
    business_name = models.CharField(max_length=250)
    phone = models.CharField(max_length=250)

    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)


class StylistSubmission(models.Model):
    leasee = models.CharField(max_length=2000)
    file = models.FileField(upload_to="/media/")

    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)