请帮我解决这个django REST框架问题。我正在尝试创建rest api，它将根据传递的参数在两个表中填充数据。
我的模特看起来像。
class WorkloadType(models.Model):
type = models.CharField(max_length=60)
status = models.BooleanField(default=True)
class Workload(models.Model):
workload_type = models.ForeignKey(WorkloadType)
workload_group = models.IntegerField(blank=True, null=True)
name = models.CharField(max_length = 60)
hdd_gb = models.IntegerField(blank=True, null=True)
ssd_gb = models.IntegerField(blank=True, null=True)
iops = models.CharField(max_length = 60)
vcpu = models.IntegerField(blank=True, null=True)
cpu = models.IntegerField(blank=True, null=True)
created_date = models.DateTimeField(auto_now_add=True, blank=True)
status = models.BooleanField(default=True)
class VdiWorkload(models.Model):
workload = models.ForeignKey(Workload)
provision_type = models.CharField(max_length = 60)
number_of_users = models.IntegerField()
json_data = models.CharField(max_length=255,blank = True,null = True)
status = models.BooleanField(default=True)
created_date = models.DateTimeField(auto_now_add=True, blank=True)
我的serializer.py文件看起来像。
from django.forms import widgets
from rest_framework import serializers
from models import WorkloadType,Workload, \
VdiWorkload,DbWorkload,\
VmWorkload,ExchangeWorkload,RawWorkload
class VdiSerializer(serializers.Serializer):
class Meta:
model = VdiWorkload
class WorkloadSerializer(serializers.Serializer):
vdi = VdiSerializer(required = False)
pk = serializers.IntegerField(read_only=True)
workload_group = serializers.IntegerField(required=False)
workload_type = serializers.CharField(max_length = 10)
name = serializers.CharField(max_length = 60)
hdd_gb = serializers.IntegerField()
ssd_gb = serializers.IntegerField()
iops = serializers.CharField(max_length = 60)
vcpu = serializers.IntegerField()
cpu = serializers.IntegerField()
class Meta:
model = Workload
fields = ('vdi','workload_group','workload_type','name','hdd_gb','ssd_gb','iops','vcpu','cpu')
def create(self, validated_data):
"""
Create and return a new `Workload` instance, given the validated data.
"""
wt = WorkloadType.objects.get(type = validated_data['workload_type'])
validated_data['workload_type'] = wt
print "=-=-=-=-=-=-=-=-=-=-=-=-=------"
if not validated_data['workload_group']:
workload_group = Workload.objects.latest('workload_group')
validated_data['workload_group'] = workload_group
else:
try:
workload_group = Workload.objects.latest('workload_group')
validated_data['workload_group'] = workload_group + 1
except:validated_data['workload_group'] = 1
#try:node_exist = Workload.objects.get(name = validated_data['name'])
#except:node_exist = None
#if node_exist:
# raise serializers.ValidationError('Node name already exist.')
#else:
wl = Workload.objects.create(**validated_data)
VdiWorkload.objects.create(workload=wl, **validated_data)
return wl
现在我把剩下的身体传递过来了。
{
"type": "Exchange",
"iops": "22",
"name": "another model",
"hdd_gb": "23",
"ssd_gb": "320",
"hdd_count": "123",
"ssd_count": "4",
"memory": "123",
"core": "114",
"rackspace": "6",
"vcpu":"12",
"workload_type":"VDI",
"workload_group":true,
"cpu":"1",
"vdi":[{
"provision_type":"user",
"number_of_users":"10",
"json_data":"any extra data which we want"
}]
}
但每当我发帖请求时，我都会收到错误
回溯
raceback:
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
111. response = callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/views/decorators/csrf.py" in wrapped_view
77. return view_func(*args, **kwargs)
File "/home/rohit/workspace/sizer/src/sizer/Workload/views.py" in workload_list
49. serializer.save()
File "/usr/local/lib/python2.7/dist-packages/rest_framework/serializers.py" in save
164. self.instance = self.create(validated_data)
File "/home/rohit/workspace/sizer/src/sizer/Workload/WorkloadSerializer.py" in create
63. return Workload.objects.create(**validated_data)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py" in create
137. return self.get_query_set().create(**kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py" in create
375. obj = self.model(**kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in __init__
367. raise TypeError("'%s' is an invalid keyword argument for this function" % kwargs.keys()[0])
Exception Type: TypeError at /workload/workloadlist/
Exception Value: 'vdi' is an invalid keyword argument for this functi
如果您需要任何其他信息，请告诉我，我仍然无法解决这个问题。
我无法识别此问题，因为我是DRF的新手。
请让我知道我在这里做错了什么。我的观点看起来很像。
@csrf_exempt
def workload_list(request):
"""
List all code users, or create a new user.
"""
print "Herer I am *****************************111111"
if request.method == 'GET':
print "Herer I am *****************************"
workloads = Workload.objects.all()
serializer = WorkloadSerializer(workloads, many=True)
return JSONResponse(serializer.data)
elif request.method == 'POST':
data = JSONParser().parse(request)
serializer = WorkloadSerializer(data=data)
print serializer
print "****************** I am in ***********views now "
if serializer.is_valid():
serializer.save()
return JSONResponse(serializer.data, status=201)
return JSONResponse(serializer.errors, status=400)
答案 0 :(得分：1)
请原谅我，如果这是偏离轨道，但在我看来，模型对嵌套字段（vdi）一无所知。您是否尝试将其从validated_data中弹出？
这是一个小的（未经测试的）我使用Django == 1.7使用djangorestframework == 3.1.3的例子。
models.py：
class Child(models.Model):
child_data = models.CharField(max_length=255)
class Parent(models.Model):
# Set 'related_name' to the nested field name in the serializer.
child_id = models.ForeignKey(Child, related_name='child')
serializers.py：
class ChildSerializer(serializers.ModelSerializer):
class Meta:
model = Child
class ParentSerializer(serializers.ModelSerializer):
# The ForeignKey in the model is supplied with this name so that GET
# requests can populate this and the source field below makes it
# accessible in create after validation.
child = TestInfoSerializer(source='child_id')
class Meta:
model = Parent
fields = ('child', )
def create(self, validated_data):
child_data = validated_data.pop('child_id') # strip out child_id for subsequent Parent create
try:
# try to find an existing row to fulfill the foreign key
child_instance = Child.objects.filter(**child_data)[0]
except IndexError:
# create a new row
child_instance = Child.objects.create(**child_data)
return Parent.objects.create(child_id=child_instance, **validated_data)
有了这个，我可以在不考虑外键的情况下POST嵌套JSON：
{
"child": {
"child_data": "asdf"
}
}
GET也会使用此设置返回嵌套表示。
我希望这会有所帮助。