Python 带有ModelBase的Django表单集不呈现复选框默认值，而是呈现下拉列表

如果

没有新项目

存在，我需要创建一个必需的复选框选项。我使用的是model.NullBoolean字段。根据Django文档，布尔字段应该呈现checkbox小部件，但是NullBoolean呈现Select。切换到NullBoolean的原因是迁移时出现null错误。所以现在我得到了一个下拉列表，上面有“是”和“否” 我如何在基本模型中创建复选框。使用NullBoolean的模型还是有更好的方法

（这是一个编辑，因为我错过了关于Django文档的演讲。谢谢@Alasdair）

/models.py

class StoreNightlyReport(models.Model):
    store_number = models.ForeignKey('Stores', verbose_name='Store Number', max_length=20, null=True)
    date = models.DateField(null=True)
    #managers = models.ManyToManyField('auth.User', blank=True, null=True)

    def __str__(self):
        return self.store_number.store_number


class StoreNightlyReportsBase(models.Model):
    store_nightly_report = models.ForeignKey(StoreNightlyReport)
    no_new_item = models.NullBooleanField(verbose_name='No New Items', default=True)
    customer = models.CharField(verbose_name='Customer Name', max_length=20, null=True)

    class Meta:
        abstract = True

/forms.py

class StoreNightlyReportsForm(ModelForm):
    class Meta:
        model = StoreNightlyReport
        widgets = {'date': SelectDateWidget()}
        exclude = ()

    def __init__(self, *args, **kwargs):
        user = kwargs.pop('user')
        super(StoreNightlyReportsForm, self).__init__(*args, **kwargs)
        if 'store_number' in self.fields:
            if not user.is_superuser:
                self.fields['store_number'].queryset = Stores.objects.filter(managers=user)

/views.py

class StoresNightlyReportsNewLoansCreate(CreateView):
    template_name = 'reports/storenightlyreport_form.html'
    model = StoreNightlyReport
    form_class = forms.StoreNightlyReportsForm
    success_url = reverse_lazy('reports:storenightlyreports')

    def get_form(self, form_class=None):
        form_class = self.get_form_class()

        form = form_class(self.request.POST or None, user=self.request.user)
        self.formsets = {}
        StoreNightlyReportsNewLoanFormSet = inlineformset_factory(StoreNightlyReport,
                                                                  StoreNightlyReportsNewLoan,
                                                                  exclude=[],
                                                                  extra=1)
        self.formsets['new_loan'] = StoreNightlyReportsNewLoanFormSet(self.request.POST or None)

    def get_context_data(self, **kwargs):
        data = super(StoresNightlyReportsNewLoansCreate, self).get_context_data(**kwargs)
        data['formset_new_loan'] = self.formsets['new_loan']
        return data


    def get_context_data(self, **kwargs):
        data = super(StoresNightlyReportsNewLoansCreate, self).get_context_data(**kwargs)
        #formset_renewal = StoreNightlyReportsRenewalFormSet()
        data['formset_new_loan'] = self.formsets['new_loan']
    return super(StoresNightlyReportsNewLoansCreate, self).form_invalid(form)

/template.html

{% extends "reports/base.html" %}
{% load static %}

{% block body_block %}


<div class="container-fluid">
    <form class="form-inline" action="" method="post">
        {% csrf_token %}
        {{ form }}

        <table class="table">
            {{ formset_new_loan.management_form }}
            <div>
            <br><h4><strong>New Loans</strong></h4><br>
            {% include "reports/formsets.html" with formset=formset_new_loan formset_class_name='new_loan' %}
            </div>
        </table>

{%extends“reports/base.html”%}
{%load static%}
{%block body_block%}
{%csrf_令牌%}
{{form}}
{{formset_new_loan.management_form}

新贷款

{%include“reports/formsets.html”，其中formset=formset\u new\u loan formset\u class\u name='new\u loan%}

已修复

经过一番思考，我回到model.Base，将其更改为BooleanField类型，并添加了一个默认值。这清除了迁移时的null错误，并呈现了一个复选框选项

class StoreNightlyReportsBase(models.Model):
    store_nightly_report = models.ForeignKey(StoreNightlyReport)
    no_new_item = models.BooleanField(verbose_name="Check if No New Items", default=False)
    customer = models.CharField(verbose_name='Customer Name', max_length=20, null=True)

---

您对文档的看法不正确-的默认小部件是

NullBooleanSelect

。如果您使用复选框，则无法区分

False

和

Null

@Alasdair如果您是正确的，我正在查看布尔字段，这是我的初衷，但随后在迁移过程中收到空错误，并按照错误建议选择空布尔值，以便将其添加到模型中。考虑到这种情况，我如何使用NullBoolean实现这一点，或者如果Boolean确实是获取复选框的唯一方法，我如何清除null错误？