Question

我使用模型formset允许用户动态地向表中添加重复的表单（modbus寄存器，因为设备可以有多个寄存器）。

我遇到的问题是，只要我保存formset（存储到db），当我回到同一页面创建一个带寄存器的新设备时，django会渲染所有以前创建的表单只有一个空表格（然后能够添加表格）。

以下是在我的formset中创建3个表单（存储在db中）后的示例：

以下是它应该是什么样子：

它应该只在我的formset中显示1个空表单，然后用户可以动态添加表单。

我的观点：

def create_modbus_view(request):
    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
        })
    )

模型：

class Register(models.Model):
    ixRegister = models.AutoField(primary_key=True)
    sRegisterName = models.CharField(max_length=100)
    iStartingAddr = models.IntegerField()
    bRange = models.BooleanField(default=False)
    ixRegisterType = models.ForeignKey(RegisterType)
    iOffset = models.IntegerField(blank=True, null=True)

    class Meta:
        db_table = 'TRegister'

class ModbusDevice(models.Model):
    ixModbusDevice = models.AutoField(primary_key=True)
    sModbusName = models.CharField(verbose_name='Device Name',max_length=100)
    iPort = models.IntegerField(verbose_name='Port')
    iSlave = models.IntegerField(verbose_name='Slave ID')
    sIP = models.GenericIPAddressField(verbose_name='IP Address')

    class Meta:
        db_table = 'TModbusDevice'

形式：

class ModbusRegistersForm(ModelForm):
    ixRegisterType = ModelChoiceField(queryset=RegisterType.objects.all()),
    bRange = BooleanField(required=False)
    bRange.widget.attrs['data-form'] = 0
    class Meta:
        model = Register
        fields = ['sRegisterName','iStartingAddr','bRange','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'}),
                'iOffset': TextInput(attrs={'placeholder': 'Address offset','class': 'form-control','data-form': '0'}),
            }


class CreateModbusForm(ModelForm):
    class Meta:
        model = ModbusDevice
        fields = ['sModbusName','iPort', 'iSlave', 'sIP']
        widgets = {
                'sModbusName': TextInput(attrs={'placeholder': 'Device Name','class': 'form-control','id': 'device-name',}),
                'iPort': TextInput(attrs={'placeholder': 'Port','class': 'form-control','id': 'port',}),
                'iSlave': TextInput(attrs={'placeholder': 'Slave id','class': 'form-control','id': 'slave-id',}),
                'sIP': TextInput(attrs={'placeholder': 'Modbus IP address','class': 'form-control','id': 'ip-address',})
            }

Answer 1

这似乎奏效了 django modelformset_factory sustains the previously submitted data even after successfully created the objects

似乎我只是要阻止它查询我的表

Django模型formset显示db数据而不是空formset

1 个答案: