Question

我写了一段代码，用户可以从选择框中选择职业（老师，医生，飞行员等），如果他们的职业不在列表中，他们可以选择“其他”，然后写下他们的职业在下面的文本框中。

我可以成功检测到他们是否从下拉框中选择了“其他”，但无法弄清楚如何用“其他”字段中的数据填充“职业”字段。

if request.method == 'POST':
        form = OccupationForm(request.POST, request.FILES, instance=request.user.occupation)
        if form.is_valid():
            # if user selected 'other' - get input from text field
            if form['occupation'].value() == 'other':
                # this doesnt work
                #form_data = self.get_form_step_data(form)
                #form.other = form_data.get('other', '')
                #form.save()
                return redirect('#')

            #form.save()
            #return redirect('#')

    else:
        form = OccupationForm(instance=request.user.occupation)

谢谢。

编辑：缩短了模型。py

class Occupation(models.Model):
    # I just realized, maybe this should be OneToManyField ??
    user = models.OneToOneField(User, on_delete=models.CASCADE)

    OCCUPATIONS = (
        ('teacher', 'Teacher'),
        ('doctor', 'Doctor'),
        ('other', 'Other'),
    )

    occupation = models.CharField('What is your job?', max_length=200, null=True, choices=OCCUPATIONS)

缩短表格。py

class OccupationsForm(forms.ModelForm):
    other = forms.CharField(required=False, label='')

    def clean(self):
        cleaned_data = super().clean()
        if cleaned_data.get('occupations') == 'other':
            cleaned_data['occupations'] = cleaned_data.get('other')
        return cleaned_data

    class Meta:
        model = Occupations

        fields = ['occupations']

谢谢

Answer 1

表单clean methods是验证和清除发送到表单的数据的地方，这包括可能更改数据的地方。

class OccupationForm(forms.ModelForm):

    ....

    def clean(self):
        cleaned_data = super().clean()
        if cleaned_data.get('occupation') == 'other':
            cleaned_data['occupation'] = cleaned_data.get('other')
        return cleaned_data

现在您可以在form.save之后直接调用form.is_valid，因为clean方法将清除/返回正确的数据

将一个表单字段的值替换为另一个

1 个答案: