Question

我的模型有空白=真实字段。在我的表单中，我有可选的字段，如果在模型中它们是空白=真。所以，如果在我的表单中我想让它们为空，然后我想过滤我的模型对象，我不想使用空字段进行搜索。在这种情况下我是否需要创建其他查询？

forms.py

class searchGoods(forms.Form):
    region_from = forms.ModelChoiceField(required=False, queryset = Region.objects.all(), widget = forms.Select())
    region_to = forms.ModelChoiceField(required=False, queryset = Region.objects.all(), widget = forms.Select())

models.py

class Add_good(models.Model):
    loading_region = models.ForeignKey(Region, blank=True, related_name="loading_region", null=True)

    unloading_region = models.ForeignKey(Region, blank=True, related_name="unloading_region", null=True)

views.py

if form['region_from'] == None:
            if form['region_to'] == None:
                data_from_db = Add_good.objects.filter(loading_country=form['country_from'],
                                               unloading_country=form['country_to'],

                                               loading_city=form['city_from'],
                                               unloading_city=form['city_to'],

                                               loading_goods_date_from__gte=form['date_from'],
                                               loading_goods_date_to__lte=form['date_to'],

                                               mass__gte=form["mass_from"],
                                               mass__lte=form["mass_to"],

                                               volume__gte=form['volume_from'],
                                               volume__lte=form['volume_to'],

                                               auto_current_type__in=auto_types,
                                               )
            else:
                data_from_db = Add_good.objects.filter(loading_country=form['country_from'],
                                                       unloading_country=form['country_to'],

                                                       loading_city=form['city_from'],
                                                       unloading_city=form['city_to'],

                                                       unloading_region=form["region_to"],

                                                       loading_goods_date_from__gte=form['date_from'],
                                                       loading_goods_date_to__lte=form['date_to'],

                                                       mass__gte=form["mass_from"],
                                                       mass__lte=form["mass_to"],

                                                       volume__gte=form['volume_from'],
                                                       volume__lte=form['volume_to'],

                                                       auto_current_type__in=auto_types,
                                                       )

        else:
            if form['region_to'] == None:
                data_from_db = Add_good.objects.filter(loading_country=form['country_from'],
                                                   unloading_country=form['country_to'],

                                                   loading_city=form['city_from'],
                                                   unloading_city=form['city_to'],

                                                   loading_region=form["region_from"],

                                                   loading_goods_date_from__gte=form['date_from'],
                                                   loading_goods_date_to__lte=form['date_to'],

                                                   mass__gte=form["mass_from"],
                                                   mass__lte=form["mass_to"],

                                                   volume__gte=form['volume_from'],
                                                   volume__lte=form['volume_to'],

                                                   auto_current_type__in=auto_types,
                                                   )
            else:
                data_from_db = Add_good.objects.filter(loading_country=form['country_from'],
                                                       unloading_country=form['country_to'],

                                                       loading_city=form['city_from'],
                                                       unloading_city=form['city_to'],

                                                       loading_region=form["region_from"],
                                                       unloading_region=form["region_to"],

                                                       loading_goods_date_from__gte=form['date_from'],
                                                       loading_goods_date_to__lte=form['date_to'],

                                                       mass__gte=form["mass_from"],
                                                       mass__lte=form["mass_to"],

                                                       volume__gte=form['volume_from'],
                                                       volume__lte=form['volume_to'],

                                                       auto_current_type__in=auto_types,
                                                       )

嗯，确切地说，在我的模型中有更多字段，当我保存它们时，您可以在视图中看到所有字段

Answer 1

情况是我忘记了makemigrations。之后一切正常！

如果表单字段为None，则在该字段的模型中找不到

1 个答案: