缩小Django形式的选择

Question

我有一个模型:

CAMPAIGN_TYPES = (
                  ('email','Email'),
                  ('display','Display'),
                  ('search','Search'),
                  )

class Campaign(models.Model):
    name = models.CharField(max_length=255)
    type = models.CharField(max_length=30,choices=CAMPAIGN_TYPES,default='display')

一个表格:

class CampaignForm(ModelForm):
    class Meta:
        model = Campaign

有没有办法限制"类型"字段可用的选项？我知道我可以做一个单值字段:CampaignForm(initial={'name':'Default Name'})但我找不到任何方法为选择集做这个.

Answer 1

这就是我如何限制显示的选项:

在forms.py中为表单添加init方法

class TaskForm(forms.ModelForm):
    ....

    def __init__(self, user, *args, **kwargs):
        '''
        limit the choice of owner to the currently logged in users hats
        '''

        super(TaskForm, self).__init__(*args, **kwargs)

        # get different list of choices here
        choices = Who.objects.filter(owner=user).values_list('id','name')
        self.fields["owner"].choices = choices