两个不同模型中的form.save混淆

如何解决两个不同模型中的form.save混淆

由于型号问题，我在显示页面时遇到问题。老实说，我不知道问题出在哪里，我在这里看到的每个解决方案都超出了我的范围，因为我才刚刚开始学习Django。总结如下： 我从两个模型（相互关联）创建了两个表单，并将这些表单中的数据呈现在单个页面中。数据在仪表板面板上显示良好，并且提交确实将其保存到数据库中。我试图覆盖形式的保存功能，但没有结果。但是，每当我尝试加载包含相同数据的页面（为客户显示类似首页的页面）时，我都会被打中

 Traceback (most recent call last):
  File "C:\Users\shahi\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\exception.py",line 34,in inner
    response = get_response(request)
  File "C:\Users\shahi\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\base.py",line 115,in _get_response
    response = self.process_exception_by_middleware(e,request)
  File "C:\Users\shahi\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\base.py",line 113,in _get_response
    response = wrapped_callback(request,*callback_args,**callback_kwargs)
  File "D:\Softwarica\3rd semester\Modern Web\Assignment\Project - Farmer's Market\farmersmarket\home\views.py",line 9,in index
    order,created = Order.objects.get_or_create(customer=customer,complete=False)
  File "C:\Users\shahi\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\db\models\manager.py",line 82,in manager_method
    return getattr(self.get_queryset(),name)(*args,**kwargs)
  File "C:\Users\shahi\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\db\models\query.py",line 559,in get_or_create
    return self.get(**kwargs),False
  File "C:\Users\shahi\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\db\models\query.py",line 419,in get
    raise self.model.MultipleObjectsReturned(
shop.models.Order.MultipleObjectsReturned: get() returned more than one Order -- it returned 2!

forms.py中的代码：

from django.forms import ModelForm
from shop.models import *

class OrderForm(ModelForm):
    class Meta:
        model = Order
        fields = ('customer',)

class OrderItemForm(ModelForm):
    class Meta:
        model = OrderItem
        fields = ('item','status',)

views.py

def createOrder(request):
form_order = OrderForm()
form_orderitem = OrderItemForm()

if request.method == 'POST':
    # print('Printing POST',request.POST)
    form_order = OrderForm(request.POST)
    form_orderitem = OrderItemForm(request.POST)

    if form_order.is_valid() and form_orderitem.is_valid():
        form_order.save()
        form_orderitem.save()

        return redirect('/dashboard')

context = {'form_order': form_order,'form_orderitem': form_orderitem}

return render(request,'dashboard/order_form.html',context)

我尝试覆盖表单中的save函数，但没有结果。

解决方法

get（）不能用于返回多个对象的情况。尝试使用filter（）。

如果有帮助，请检查first（）或last（）。