Question

models.py

class Test(models.Model):
    name = models.CharField(max_length=256)
    slug_name = models.CharField(max_length=256)
    template = models.BooleanField("Is Template",default=False)

    @staticmethod
    def template_as_tuple():
        return Test.objects.filter(template=True).values_list('id','name')

forms.py

class Test2(forms.ModelForm):
    templates = forms.ChoiceField(choices=Catalogue.predefined_settings_as_tuple(), required=False)
    path = orms.FileField()

问题是当我在模型中添加模板时，它不会显示在forms.py中。我需要重新启动网络服务器才能显示更新

Answer 1

摆脱那种静态方法。在表单中执行此操作：

class Test2(forms.ModelForm):
    templates = forms.ModelChoiceField(queryset=Test.objects.filter(template=True))

Answer 2

@ Daniel的答案是正确的，但是如果您经常过滤对象，custom manager可能更合适：

class TemplateFilter(models.Manager):
    def get_query_set(self):
        return super(TemplateFilter, self).get_query_set().filter(template=True)

class Test(models.Model):
    name = models.CharField(max_length=256)
    slug_name = models.CharField(max_length=256)
    template = models.BooleanField("Is Template",default=False)

    objects = models.Manager()
    templates = TemplateFilter()

class Test2(forms.ModelForm):
    templates = forms.ModelChoiceField(queryset=Test.templates.all())

Django forms.py没有从DB更新新值

2 个答案: