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我正在使用django-nested-inlines在 admin 中为这三个模型提供嵌套内联：

class Venue(models.Model):
    name = models.CharField(max_length=100)

class VenueBookingSetting(models.Model):
    venue = models.ForeignKey(Venue)
    name = models.CharField(max_length=100, default='')
    use_date_range = models.BooleanField(default=False)
    use_valid_days = models.BooleanField(default=False)
    days_in_advance = models.SmallIntegerField(default=DEFAULT_DIA)
    max_covers = models.SmallIntegerField(default=0, blank=True)
    active = models.BooleanField(default=False)

class VenueValidBookingDays(models.Model):
    booking_setting = models.ForeignKey(VenueBookingSetting)
    sunday = models.BooleanField(default=True)
    monday = models.BooleanField(default=True)
    tuesday = models.BooleanField(default=True)
    wednesday = models.BooleanField(default=True)
    thursday = models.BooleanField(default=True)
    friday = models.BooleanField(default=True)
    saturday = models.BooleanField(default=True)

这是我的 Venue 管理员设置：

class VenueBookingValidDaysInline(NestedTabularInline):
    model = VenueBookingValidDays

class VenueBookingSettingInline(NestedTabularInline):
    model = VenueBookingSetting
    inlines = [VenueBookingValidDaysInline,]

class VenueAdmin(NestedModelAdmin):
    inlines = [VenueBookingSettingInline,]

我遇到的问题是在不填写父预订设置的情况下添加预订天数时在哪里捕获 IntegrityError？我的意思是我取消选中一些有效日期，但不更改任何父预订设置项目。谁能告诉我应该在哪里捕获该错误以显示验证消息而不是让页面崩溃到 500 错误？

4

1 回答 1

0

我已经解决了这个问题。我需要覆盖 formset clean 方法VenueBookingSettingInline：

class VenueBookingSettingInlineFormset(BaseNestedInlineFormSet):
    def clean(self):
        '''
        Ensure that any newly added nested form has a prent which has been completed,
        otherwise an IntegrityError will be raised causing a 500 error
        '''
        if any(self.errors):
            # Don't bother validating the formset unless each form is valid on its own
            return
        for form in self.forms:
            # if this form is a new addition (i.e. it has changed but it has no
            # id) then we need to save it and add it to the nested forms
            for nested_formset in form.nested_formsets:
                for nested_form in nested_formset:
                    if (nested_form.has_changed() and nested_form.instance.id is None and
                                        not form.has_changed() and form.instance.id is None):
                        raise forms.ValidationError('Please ensure you add a %s when adding a %s'
                            % (form._meta.model.__name__, nested_form._meta.model.__name__))

class VenueBookingSettingInline(NestedTabularInline):
    model = VenueBookingSetting
    inlines = [VenueBookingValidDaysInline,]
    formset = VenueBookingSettingInlineFormset

如果有人有更好或更清洁的解决方案，请发布。

于 2013-10-03T10:39:13.433 回答