我已经使用 Django 基于类的视图做到了这一点。
这是我的方法：
models.py
from django.db import models
class Author(models.Model):
name = models.CharField(max_length=100)
class Book(models.Model):
author = models.ForeignKey(Author)
title = models.CharField(max_length=100)
forms.py
from django.forms import ModelForm
from django.forms.models import inlineformset_factory
from crispy_forms.helper import FormHelper
from crispy_forms.layout import Layout, Fieldset
from .models import Author, Book
class AuthorForm(ModelForm):
class Meta:
model = Author
fields = ('name', )
@property
def helper(self):
helper = FormHelper()
helper.form_tag = False # This is crucial.
helper.layout = Layout(
Fieldset('Create new author', 'name'),
)
return helper
class BookFormHelper(FormHelper):
def __init__(self, *args, **kwargs):
super(BookFormHelper, self).__init__(*args, **kwargs)
self.form_tag = False
self.layout = Layout(
Fieldset("Add author's book", 'title'),
)
BookFormset = inlineformset_factory(
Author,
Book,
fields=('title', ),
extra=2,
can_delete=False,
)
views.py
from django.views.generic import CreateView
from django.http import HttpResponseRedirect
from .forms import AuthorForm, BookFormset, BookFormHelper
from .models import Book, Author
class AuthorCreateView(CreateView):
form_class = AuthorForm
template_name = 'library/manage_books.html'
model = Author
success_url = '/'
def get(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
book_form = BookFormset()
book_formhelper = BookFormHelper()
return self.render_to_response(
self.get_context_data(form=form, book_form=book_form)
)
def post(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
book_form = BookFormset(self.request.POST)
if (form.is_valid() and book_form.is_valid()):
return self.form_valid(form, book_form)
return self.form_invalid(form, book_form)
def form_valid(self, form, book_form):
"""
Called if all forms are valid. Creates a Author instance along
with associated books and then redirects to a success page.
"""
self.object = form.save()
book_form.instance = self.object
book_form.save()
return HttpResponseRedirect(self.get_success_url())
def form_invalid(self, form, book_form):
"""
Called if whether a form is invalid. Re-renders the context
data with the data-filled forms and errors.
"""
return self.render_to_response(
self.get_context_data(form=form, book_form=book_form)
)
def get_context_data(self, **kwargs):
""" Add formset and formhelper to the context_data. """
ctx = super(AuthorCreateView, self).get_context_data(**kwargs)
book_formhelper = BookFormHelper()
if self.request.POST:
ctx['form'] = AuthorForm(self.request.POST)
ctx['book_form'] = BookFormset(self.request.POST)
ctx['book_formhelper'] = book_formhelper
else:
ctx['form'] = AuthorForm()
ctx['book_form'] = BookFormset()
ctx['book_formhelper'] = book_formhelper
return ctx
urls.py
from django.conf.urls import patterns, url
from django.views.generic import TemplateView
from library.views import AuthorCreateView
urlpatterns = patterns('',
url(r'^author/manage$', AuthorCreateView.as_view(), name='handle-books'),
url(r'^$', TemplateView.as_view(template_name='home.html'), name='home'),
)
manage_books.html
{% load crispy_forms_tags %}
<head>
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
</head>
<div class='container'>
<form method='post'>
{% crispy form %}
{{ book_form.management_form }}
{{ book_form.non_form_errors }}
{% crispy book_form book_formhelper %}
<input class='btn btn-primary' type='submit' value='Save'>
</form>
<div>
注意：
我知道显示的解决方案代码更多，但开始使用 Django 基于类的视图很棒。