所以我有一个formset，用于构建一个基本的html表，我可以动态地将表单作为一行添加到表中。
我遇到的问题是，当我发布数据并在我的formset上运行is_valid()时，我不断收到'unicode' object has no attribute 'get'例外
形式：
class ModbusRegistersForm(ModelForm):
ixRegisterType = ModelChoiceField(queryset=RegisterType.objects.all()),
class Meta:
model = Register
fields = ['sRegisterName','iStartingAddr','iEndingAddr','ixRegisterType','iOffset']
widgets = {
'sRegisterName': TextInput(attrs={'placeholder': 'Register Name','class': 'form-control', 'data-form': '0'}),
'iStartingAddr': TextInput(attrs={'placeholder': 'Starting address','class': 'form-control','data-form': '0'}),
'iEndingAddr': TextInput(attrs={'placeholder': 'Ending address','class': 'form-control','data-form': '0'}),
'iOffset': TextInput(attrs={'placeholder': 'Address offset','class': 'form-control','data-form': '0'}),
}
查看：
def create_modbus_view(request):
assert isinstance(request, HttpRequest)
modbus_device = CreateModbusForm()
RegisterFormset = modelformset_factory(Register, form=ModbusRegistersForm)
register_forms = RegisterFormset()
return render(
request,
'app/create_modbus.html',
context_instance = RequestContext(request,
{
'title':'Create Modbus Device',
'tag': 'create_modbus',
'modbus_device': modbus_device,
'register_forms': register_forms
})
)
接收POST的Ajax视图：
def ping_device(request):
response_data = {}
response_data['conn_result'] = ''
try:
if request.method == 'POST':
port = None
slave = None
ip = None
modbus_device = CreateModbusForm(request.POST['form'])
RegisterFormset = modelformset_factory(Register, form=ModbusRegistersForm)
registers = RegisterFormset(request.POST['form'])
if registers.is_valid(): #fails here
for reg in registers.forms:
hi = "i never work"
if modbus_device.is_valid():
port = modbus_device['port']
slave = modbus_device['slave_id']
ip = modbus_device['ip_address']
registers = modbus_device
response_data['conn_result'] = mb_ping_result
return JsonResponse(response_data)
except Exception as e:
response_data['conn_result'] = str(e)
return JsonResponse(response_data)
编辑似乎我的registers formset不包含forms属性，也包含我的堆栈跟踪：
Internal Server Error: /ping_device
Traceback (most recent call last):
File "C:\Users\jb.DOM\Desktop\BACnet Modbus\ModbusBACnet\BACnetModbus_
WebApp\env\lib\site-packages\django\core\handlers\base.py", line 132, in get_res
ponse
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\jb.DOM\Desktop\BACnet Modbus\ModbusBACnet\BACnetModbus_
WebApp\app\views.py", line 128, in ping_device
for reg in registers.forms:
File "C:\Users\jb.DOM\Desktop\BACnet Modbus\ModbusBACnet\BACnetModbus_
WebApp\env\lib\site-packages\django\utils\functional.py", line 60, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "C:\Users\jb.DOM\Desktop\BACnet Modbus\ModbusBACnet\BACnetModbus_
WebApp\env\lib\site-packages\django\forms\formsets.py", line 142, in forms
forms = [self._construct_form(i) for i in range(self.total_form_count())]
File "C:\Users\jb.DOM\Desktop\BACnet Modbus\ModbusBACnet\BACnetModbus_
WebApp\env\lib\site-packages\django\forms\formsets.py", line 115, in total_form_
count
return min(self.management_form.cleaned_data[TOTAL_FORM_COUNT], self.absolut
e_max)
File "C:\Users\jb.DOM\Desktop\BACnet Modbus\ModbusBACnet\BACnetModbus_
WebApp\env\lib\site-packages\django\forms\formsets.py", line 94, in management_f
orm
if not form.is_valid():
File "C:\Users\jb.DOM\Desktop\BACnet Modbus\ModbusBACnet\BACnetModbus_
WebApp\env\lib\site-packages\django\forms\forms.py", line 184, in is_valid
return self.is_bound and not self.errors
File "C:\Users\jb.DOM\Desktop\BACnet Modbus\ModbusBACnet\BACnetModbus_
WebApp\env\lib\site-packages\django\forms\forms.py", line 176, in errors
self.full_clean()
File "C:\Users\jb.DOM\Desktop\BACnet Modbus\ModbusBACnet\BACnetModbus_
WebApp\env\lib\site-packages\django\forms\forms.py", line 392, in full_clean
self._clean_fields()
File "C:\Users\jb.DOM\Desktop\BACnet Modbus\ModbusBACnet\BACnetModbus_
WebApp\env\lib\site-packages\django\forms\forms.py", line 401, in _clean_fields
value = field.widget.value_from_datadict(self.data, self.files, self.add_pre
fix(name))
File "C:\Users\jb.DOM\Desktop\BACnet Modbus\ModbusBACnet\BACnetModbus_
WebApp\env\lib\site-packages\django\forms\widgets.py", line 223, in value_from_d
atadict
return data.get(name, None)
AttributeError: 'unicode' object has no attribute 'get'
[15/Sep/2015 17:20:14] "POST /ping_device HTTP/1.1" 500 17336
编辑2 request.POST [＆＃39;表格＆＃39;]内容：
HTTP/1.1" 200 16448
device_name=dev&csrfmiddlewaretoken=UrsGnQNnpEGVptIGXlEe2221AfdAzRv9&port=3&slav
e_id=3&ip_address=3&form-TOTAL_FORMS=2&form-INITIAL_FORMS=0&form-MIN_NUM_FORMS=0
&form-MAX_NUM_FORMS=1000&form-0-sRegisterName=est&form-0-iStartingAddr=5&form-0-
iEndingAddr=34&form-0-ixRegisterType=1&form-0-iOffset=1&form-1-sRegisterName=tes
t&form-1-iStartingAddr=5&form-1-iEndingAddr=34&form-1-ixRegisterType=1&form-1-iO
ffset=1
答案 0 :(得分：0)
感谢帖子链接的jlnabais，我之前看过那个答案，但没有完全理解，所以当你发布它时我回去想出来了。
由于我使用的是ajax，后期数据被转换为unicode字符串，因此当我尝试访问数据时，它无法解析字符串。如果我没有ajax这样做，那么它的工作原理。由于我坚持使用ajax，我使用urlparse和QueryDict来解析unicode数据并将其转换为字典。
RegisterFormset = modelformset_factory(Register, form=ModbusRegistersForm)
if request.method == 'POST':
my_dic = dict(urlparse.parse_qsl(request.POST['form']))
modbus_device = CreateModbusForm(my_dic)
if modbus_device.is_valid():
port = modbus_device.cleaned_data['iPort']
slave = modbus_device.cleaned_data['iSlave']
ip = modbus_device.cleaned_data['sIP']
else:
raise ValueError(modbus_device.errors)
registers = RegisterFormset(QueryDict(request.POST['form']))
for reg in registers.forms:
if reg.is_valid():
container = RegisterContainer()
container.reg_name = reg.cleaned_data['sRegisterName']
container.reg_start_addr = reg.cleaned_data['iStartingAddr']
container.reg_range = reg.cleaned_data['bRange']
container.reg_type = reg.cleaned_data['ixRegisterType'].ixRegisterType
container.reg_offset = reg.cleaned_data['iOffset']
register_list.append(container)
else:
raise ValueError(registers.errors)