在序列化TestChild模型对象的查询集时,我希望json包含相关的TestParent对象。
这是我的代码:
from django.db import models
class TestParentManager(models.Manager):
def get_by_natural_key(self, field1, field2):
return self.get(field1=field1, field2=field2)
class TestParent(models.Model):
field1 = models.CharField(max_length=20, blank=True, default='')
field2 = models.CharField(max_length=20, blank=True, default='')
field3 = models.CharField(max_length=20, blank=True, default='')
objects = TestParentManager()
def natural_key(self):
return (self.field1, self.field2)
class Meta:
unique_together = [['field1', 'field2']]
class TestChildManager(models.Manager):
def get_by_natural_key(self, field1, field2):
return self.get(field1=field1, field2=field2)
class TestChild(models.Model):
parent = models.ForeignKey(TestParent, on_delete=models.CASCADE)
field1 = models.CharField(max_length=20, blank=True, default='')
field2 = models.CharField(max_length=20, blank=True, default='')
field3 = models.CharField(max_length=20, blank=True, default='')
objects = TestChildManager()
def natural_key(self):
return (self.field1, self.field2)
natural_key.dependencies = ['environ_tool.testparent']
class Meta:
unique_together = [['field1', 'field2']]
我跑步时
serializers.serialize(
'json',
eModels.TestChild.objects.all(),
use_natural_foreign_keys=True,
use_natural_primary_keys=True,
)
生成的json就像这样(没有TestParent对象):
[{u'fields': {u'field1': u'f1',
u'field2': u'f2',
u'field3': u'f3',
u'parent': [u'foo2', u'']},
u'model': u'environ_tool.testchild'}]
但是我也想在json中看到TestChild对象也依赖的TestParent对象,就像这样:
[{u'fields': {u'field1': u'foo2', u'field2': u'', u'field3': u''},
u'model': u'environ_tool.testparent'},
{u'fields': {u'field1': u'f1',
u'field2': u'f2',
u'field3': u'f3',
u'parent': [u'foo2', u'']},
u'model': u'environ_tool.testchild'}]
django文档使我相信这应该发生在序列化中,但是没有运气。我正在使用Django 1.11,这是文档页面https://docs.djangoproject.com/en/1.11/topics/serialization/
谢谢!
您可以为孩子编写序列化程序类。
class ChildSerializer(serializers.ModelSerializer):
class Meta:
model = childmodel
fields = '__all__'
depth = 1
您可以这样称呼它
serializer = ChildSerializer([childinstance1, ], many=True)
然后您可以将其转换为json