("Table 'trades.main_trade' doesn't exist")

class SomeModel(models.Model):
     data = models.CharField(max_length=100)

     def save(self):
         super(SomeModel, self).save(using='dataset')

class DataForm(forms.ModelForm):

        class Meta:
            model = Trade
            fields = ("data",)

        def save(self, commit=True):
            send = super(SomeModel, self).save(commit=False)
            if commit:
                send.save()
            return send