如何访问视图中的模型实例以同时保存两个表单

Question

我正在尝试将两种模型组合成一种形式。但是我无法保存表单，因为它不是模型的实例。我所追求的是一种将模型作为实例访问然后保存的方法。我正在使用脆皮表格，我已经在帖子底部描述了我所尝试的内容，我不知道为什么这不起作用，所以一如既往地感谢任何帮助。

这是我的 model.py 文件：

from django.db import models

# Create your models here.

BOOKING_STATUS = ((0, 'To be confirmed'), (1, 'Confirmed'), (2, 'Declined'))


class Customer(models.Model):
    first_name = models.CharField(max_length=80)
    last_name = models.CharField(max_length=80)
    email = models.EmailField()
    phone_number = models.CharField(max_length=20)

    def __str__(self):
        return f"Customer {self.first_name + ' ' + self.last_name}"


class Booking(models.Model):
    booking_date = models.DateField()
    booking_time = models.TimeField()
    number_attending = models.IntegerField(default=2)
    booking_status = models.IntegerField(choices=BOOKING_STATUS, default=0)
    customer = models.ForeignKey('Customer', on_delete=models.CASCADE)

    def __str__(self):
        return f"Booking by {self.customer}"

forms.py：

from .models import Customer, Booking
from django import forms


class CustomerForm(forms.ModelForm):
    class Meta:
        model = Customer
        fields = '__all__'


class BookingForm(forms.ModelForm):
    class Meta:
        model = Booking
        fields = ('booking_date', 'booking_time', 'number_attending')


class CustomerBookingForm(forms.Form):
    customer_form = CustomerForm()
    booking_form = BookingForm()

和我的观点.py

from django.shortcuts import render
from .forms import CustomerBookingForm


# Create your views here.

# https://stackoverflow.com/questions/51459435/django-create-multiple-instance-of-model-with-one-form
def customer_booking(request):
    if request.method == 'POST':
        customer_booking_form = CustomerBookingForm(request.POST)
        # if customer_booking_form.is_valid():

    else:
        customer_booking_form = CustomerBookingForm()

    context = {
        'form': customer_booking_form,
    }

    return render(request, 'booking.html', context)

我已经尝试过：

   booking_instance = customer_booking_form.cleaned_data['booking_form'].save()

但是，这无法识别字段“customer_form”或“booking_form”

Answer 1

在您的视图中实例化这两种形式，只需向其中至少一种添加

prefix

参数即可。

def customer_booking(request):
    if request.method == "POST":
        customer_form = CustomerForm(request.POST, prefix="customer")
        booking_form = BookingForm(request.POST, prefix="booking") 
        # if customer_form.is_valid()
        # if booking_form.is_valid()
        ..... 
    else:
        customer_form = CustomerForm(prefix="customer")
        booking_form = BookingForm(prefix="booking") 

prefix

将让Django为每个表单提供一个唯一的命名空间。因此，字段

name

值将具有该 ModelForm 的指定前缀，即

customer-first_name

、

booking-booking_time

等。