我有一个表,其中有几个外键,我试图获取嵌套的资源,但是资源在进行以下调用时返回null ie
http://localhost:8080/api/v1/testuns/?format=json
我回来了
^{pr2}$如您所见,我的设备和modelnumber没有嵌套资源
我的api.py文件就是这样
class DevicesResource(ModelResource):
class Meta:
queryset = Devices.objects.all()
authorization = Authorization()
resource_name = 'devices'
class ModelnumberResource(ModelResource):
class Meta:
queryset = Modelnumber.objects.all()
authorization = Authorization()
resource_name = 'modelnumber'
class PhoneResource(ModelResource):
devices = fields.ForeignKey(DevicesResource, 'devices', full=True, null=True)
modelnumber = fields.ForeignKey(ModelnumberResource, 'modelnumber', full=True, null=True)
class Meta:
queryset = Phone.objects.all()
authorization = Authorization()
resource_name = 'phone'
class TestunsResource(ModelResource):
phone = fields.ForeignKey(PhoneResource, 'phone', full=True, null=True)
class Meta:
queryset = Testuns.objects.all()
authorization = Authorization()
resource_name = 'testuns'
还有我的模型.py是
class Devices(models.Model):
device_id = models.AutoField(primary_key=True)
device_name = models.CharField(max_length=135, unique=True, blank=True)
class Meta:
db_table = u'devices'
class Modelnumber(models.Model):
model_number_id = models.AutoField(primary_key=True)
model_name = models.CharField(max_length=135, unique=True, blank=True)
class Meta:
db_table = u'modelnumber'
class Phone(models.Model):
phone_id = models.AutoField(primary_key=True)
model_number = models.ForeignKey(Modelnumber)
device = models.ForeignKey(Devices)
class Meta:
db_table = u'phone'
class Testuns(models.Model):
test_run_id = models.AutoField(primary_key=True)
score = models.IntegerField()
phone = models.ForeignKey(Phone)
result = models.CharField(max_length=135)
为什么我的一些嵌套资源返回null?在
更新: 添加mysql查询
mysql> select * from testuns;
+-------------+-------+----------+--------+
| test_run_id | score | phone_id | result |
+-------------+-------+----------+--------+
| 0 | 90 | 2 | PASS |
+-------------+-------+----------+--------+
1 row in set (0.00 sec)
mysql> select * from phone;
+----------+-----------------+-----------+
| phone_id | model_number_id | device_id |
+----------+-----------------+-----------+
| 2 | 1 | 1 |
+----------+-----------------+-----------+
1 row in set (0.00 sec)
mysql>
你的评论无意中给我指出了这个解决方案:
按照模型中的名称命名资源字段。在
我在自己的项目中测试了它,当resource中的字段名与模型中的字段名不同时,它返回
null
。在由于}的存在,该问题具有误导性。这使它工作正常,但不符合你的计划。我在docs中找不到解释,但在docstrings中找到了一些东西:
null=True
和{The ``attribute`` argument should specify what field/callable points to the related data on the instance object. Required.
docstring编辑:
这里line of code您的字段不是外键,但可以为null,这就是它没有引发任何异常的原因。在
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