Django 嵌套管理员

Question

这是我的代码：

模型.py

from django.db import models
class Country(models.Model):
    country_name = models.CharField(max_length = 20, default = '', )
    country_other_details = models.CharField(max_length = 100, default = '', null = True)
    class Meta:
        verbose_name_plural = "Countries"
    def __str__(self):
        return self.country_name

class State(models.Model):
    in_country = models.ForeignKey(Country, related_name='in_country',on_delete=models.DO_NOTHING)
    state_name = models.CharField(max_length = 20, default = '')
    state_other_details = models.CharField(max_length=100, default = '', null = True)
    def __str__(self):
        return self.state_name

class City(models.Model):
    in_state = models.ForeignKey(State, related_name='in_state',on_delete=models.DO_NOTHING)
    city_name = models.CharField(max_length = 20, default = '')
    city_other_details = models.CharField(max_length = 100, null = True)

    class Meta:
        verbose_name_plural = "Cities"

    def __str__(self):
        return self.city_name

forms.py

from django.forms.models import inlineformset_factory
from django.forms.models import BaseInlineFormSet

from .models import Country, State, City

from django.forms.models import BaseInlineFormSet, inlineformset_factory
from django.utils.translation import ugettext_lazy as _

# from publishing.utils.forms import is_empty_form, is_form_persisted

CityFormset = inlineformset_factory(State, City, extra=2,  fields=("city_name",))


class BaseStateFormset(BaseInlineFormSet):
    def add_fields(self, form, index):
        super(BaseStateFormset, self).add_fields(form, index)

        # save the formset in the 'nested' property
        form.nested = CityFormset(
            instance=form.instance,
            data=form.data if form.is_bound else None,
            files=form.files if form.is_bound else None,
            prefix='address-%s-%s' % (
                form.prefix,
                CityFormset.get_default_prefix()),
            # extra=1
        )

    def is_valid(self):
        result = super(BaseStateFormset, self).is_valid()

        if self.is_bound:
            for form in self.forms:
                if hasattr(form, 'nested'):
                    result = result and form.nested.is_valid()

        return result

    def save(self, commit=True):

        result = super(BaseStateFormset, self).save(commit=commit)

        for form in self.forms:
            if hasattr(form, 'nested'):
                if not self._should_delete_form(form):
                    form.nested.save(commit=commit)

        return result


StateFormset = inlineformset_factory(Country, State, formset=BaseStateFormset, extra=2, fields=("state_name",))

视图.py

from .models import Country, State, City

def manage_state(request, parent_id):

parent = get_object_or_404(Country, id=parent_id)

if request.method == 'POST':
    formset = forms.StateFormset(request.POST, instance=parent)
    if formset.is_valid():
        formset.save()
        # return redirect('parent_view', parent_id=parent.id)
        return redirect(reverse('india:manage_state', kwargs={"parent_id": parent.id}))

else:
    formset = forms.StateFormset(instance=parent)

return render(request, 'home.html', {
              'parent':parent,
              'children_formset':formset})

What i want is a single form that will create an object to Parent(Country) model and multiple object to Child(State) as according to country's object and multiple objects to Grand Child(City) according to corresponded State

例如：

<form method="POST">
    Parentform:(Country)
        <input name="country_name">


        Childform:(State)
            <input name="state_name">

            GrandChildform:(City)
                <input name = "City_name">

            <button> Add GrandChild</button>

        <button> Add Child </button>

    <button>Add Parent</button>

</form>

此外，添加按钮应该能够将更多的国家、州和城市动态添加到表单中。

任何帮助、建议或参考将不胜感激。 提前致谢。

Answer 1

我得到了解决方案。 感谢 PYTHON 和 Django。

正如我所知道的，我们可以使用内置的 package django-nested-admin编辑我们自己的管理员。

我们不需要构建我们的自定义 forms、视图或任何东西。

我正在分享我的 Django-admin 的图片：图片

为此，我正在分享描述：

首先，我们使用 pip 安装 package：

pip install django-nested-admin.

现在我们在settings.py中添加库：

INSTALLED_APPS[
    ...

    'nested_admin',

    ...
]

在urls.py中添加库的 url：

url(r'^nested_admin/', include('nested_admin.urls')),

在admin.py中注册模型：

from django.contrib import admin
from .models import State, Country, City
from nested_admin import NestedModelAdmin, NestedStackedInline, NestedTabularInline


class CityTabularInline(NestedTabularInline):
    model = City
    extra = 1


class StateTabularInline(NestedTabularInline):
    model = State
    extra = 1
    inlines = [CityTabularInline, ]


class CountryAdmin(NestedModelAdmin):
    inlines = [StateTabularInline, ]

admin.site.register(Country, CountryAdmin)

用法：

NestedModelAdmin: to extend the django ModelAdmin class and to be able to use differents
types of classes in the inlines attribute.

NestedStackedInline: to allow the addition of TabularInline classes in the inlines
attribute.

NestedTabularInline: to extend the TabularInline.

欲了解更多详情，请访问。