Django CheckboxSelectMultiple : my checkboxes are not checked

Question

我有一个 ManyToManyField , 显示复选框。当我的 bool 字段 share_data 时应检查复选框等于一。

这是代码:

class Participant(models.Model):
    databases = models.ManyToManyField(Advertiser, null=True, blank=True, through='ShareDataToBrands')

    @property
    def share_to_brands_list(self):
        brands=[]
        for brand in ShareDataToBrands.objects.all():
            brands.append((brand.advertiser.id, brand.advertiser.brand_name, brand.share_data))
    return brands


class ShareDataToBrands(models.Model):
    participant = models.ForeignKey(Participant, blank=False, null=False)
    advertiser = models.ForeignKey(Advertiser, blank=False, null=False)
    share_data= models.BooleanField(default=True)

    def __str__(self):
        return self.participant, self.advertiser, self.share_data


class ShareDataToBrandsForm(forms.ModelForm):

    class Meta:
        model = models.Participant
        fields = ('databases', )

    databases=forms.MultipleChoiceField(widget=forms.CheckboxSelectMultiple)

    def __init__(self, *args, **kwargs):
        super(ShareDataToBrandsForm, self).__init__(*args, **kwargs)
        share_to_brands=self.instance.share_to_brands_list
        self.fields['databases'].choices=self.fields['databases'].choices=[(brand[0], brand[1]) for brand in share_to_brands]
        self.initial['databases']=[brand[2] for brand in share_to_brands]
        print(self.initial['databases'])
        for brand in self.instance.share_to_brands_list:
            print brand

输出:

[True, True, True]
(1L, u'my super brand', True)
(2L, u'new brand', True)
(3L, u'just my brand', True)

当前，仅选中第一个复选框，即使所有复选框都应选中，如输出所示。怎么了？

Answer 1

我认为在为 CheckboxSelectMultiple 设置初始值时小部件，您需要传递应该检查的值列表，而不是每个选项的 bool 值列表。这样做initial = [True,True,True]不会让您选中这些框。你想做一些更像 initial = [1,2,3] 的事情.

在您的示例中，您可以将相关行替换为:

self.initial['databases']=[brand[0] for brand in share_to_brands if brand[2]]