python - DJANGO:表单中缺少空白选择选项

Question

我有以下内容:

模型.PY

LIST = (('Manager', 'Manager'),('Non-Manager', 'Non-Manager'),)

class Employee(models.Model):
    fname = models.CharField(max_length=15, blank=False, null=False)
    manager = models.CharField(max_length=15, choices=LIST, blank=True, null=True)
    comment = models.TextField(blank=True, null=True)
    def __unicode__(self):
        return self.fname

class EmployeeForm(forms.ModelForm):
    fname = forms.CharField(required=True, label='First Name')
    manager = forms.CharField(required=False, widget=Select(choices=LIST), label='Their Position?')
    comment = forms.CharField(required=False, widget=forms.Textarea(attrs={'cols': 50, 'rows': 10}), label='Comments')
    class Meta:
        model = Employee

如果我从 EmployeeForm 中删除经理，我会在表单下拉菜单中得到一个“-----”作为选项，但是如果我将经理保留在 EmployeeForm 中(并且我需要这样做才能覆盖字段标签)，它删除了“-----”。如何允许 EmployeeForm 保留“------”选项？

Answer 1

像这样的东西怎么样:

manager = forms.CharField(required=False, widget=Select(choices=(('', '----------'),) + LIST), label='Their Position?')