Django-Extra-Views：内联子模型没有作者。如何将其设置为与父级相同？答案

【问题标题】：Django-Extra-Views: Inlines child model gets author none. How do I set it the same as the parent?Django-Extra-Views：内联子模型没有作者。如何将其设置为与父级相同？
【发布时间】：2022-11-10 05:06:55
【问题描述】：

我已经在这个问题上旋转了一两天。我有 3 个模型的 django Web 应用程序

用户/模型.py：

from django.db import models
from django.db.models.signals import post_save
from django.dispatch import receiver
from django.contrib.auth.models import User

# Create your models here.
class ExtendedUser(models.Model):
    user=models.OneToOneField(User,null=True, on_delete=models.CASCADE)

    def full_name(self):
        return (self.user.get_full_name())

    def __str__(self):
        return self.user.get_full_name()

    @receiver(post_save, sender=User)
    def create_or_update_user_extendeduser(sender, instance, created, **kwargs):
        if created:
            ExtendedUser.objects.create(user=instance)
        instance.extendeduser.save()

游乐场/models.py：

class Customer(models.Model):
    def __str__(self):
        return self.Customer_Name
    Customer_Name = models.CharField(max_length=100)
    SFDC_Customer_Record_Number = models.IntegerField(default='')
    Zone = models.CharField(max_length=50, default='')
    Government = models.BooleanField(default=False)
    date_posted = models.DateTimeField(default=timezone.now)
    customerauthor = models.ForeignKey(ExtendedUser, on_delete=models.DO_NOTHING,default=ExtendedUser)

    def get_absolute_url(self):
        return reverse('playground-home')

class Vue_Quote(models.Model):
    def __str__(self):
        return self.Quote_Name
    Quote_Name = models.CharField(max_length=100)
    SFDC_Golden_Opp_ID = models.IntegerField()
    Vue_System_Count = models.IntegerField()
    date_posted = models.DateTimeField(default=timezone.now)
    author = models.ForeignKey(ExtendedUser, on_delete=models.DO_NOTHING,default=ExtendedUser,blank=True,null=True)
    Quote_Type = models.CharField(max_length=100)
    Customer = models.ForeignKey(Customer, on_delete=models.DO_NOTHING, default='')
    
    def get_absolute_url(self):
        return reverse('quote-detail',kwargs={'pk': self.pk})

我正在使用 3rd 方应用程序 django-extra-views 创建一个表单，该表单允许用户同时创建客户和报价。视图.py：

class QuoteInline(InlineFormSetFactory):
    model = Vue_Quote
    fields = ['Quote_Name','SFDC_Golden_Opp_ID','Vue_System_Count','Quote_Type',]
    factory_kwargs = {'extra':1}

class CreateQuoteInlinesView(CreateWithInlinesView):
    model = Customer
    inlines = [QuoteInline]
    fields = ['Customer_Name','SFDC_Customer_Record_Number','Zone','Government']
    template_name= 'quote_and_customer.html'

    def forms_valid(self, form, inlines):
        form.instance.customerauthor = ExtendedUser.objects.get(user=self.request.user)
        return super().forms_valid(form,inlines)

所有这一切都很好，除了我无法为 Vue_Quote 模型保存作者......我总是得到“无”：

Image of Vue_Quote.author = None from my form

我尝试了多种解决方案，但似乎无法解决这个问题，而且我在 django-extra-views 上找到的文档很少，以支持我找到解决方案。

非常感谢任何帮助！

【问题讨论】：

customer 字段是否在报价行内?- 如果是这样，您可以通过添加forms_valid 来从该字段中获取它报价行内并做form.instance.author = form.instance.Customer.customerauthor（类似于你用CreateQuoteInlinesView)我从来没有使用过这个插件所以只是抛出一个想法
@nealium 这是我的 QuoteInLine 代码： class QuoteInline(LoginRequiredMixin,InlineFormSetFactory): model = Vue_Quote fields = ['Quote_Name','SFDC_Golden_Opp_ID','Vue_System_Count','Quote_Type',] factory_kwargs = {'extra':1}不，这里没有设置客户。不知道我会在哪里设置它。
def forms_valid(self, form, inlines): self. Object = form. Save(commit=False) self.object.customerauthor = ExtendedUser.objects.get(user=self.request.user) form. Save(commit=True) for formset in inlines: formset.save(commit=False) #print(ExtendedUser.objects.get(user=self.request.user)) formset.author = ExtendedUser.objects.get(user=self.request.user) print("here comes the author") print(formset.author) formset.save() return HttpResponseRedirect(self.get_success_url())
我尝试了上述...我的打印语句从我的自定义用户模型中为我提供了正确的名称输出，但它仍然没有保存到数据库中......

标签： python django django-class-based-views

【解决方案1】：

Welp，我查看了源代码并试图弄清楚..它真的很抽象而且很多继承的

这将是我最好的猜测：

   def forms_valid(self, form, inlines):
        user = ExtendedUser.objects.get(user=self.request.user)
        form.instance.customerauthor = user
        for i in inlines:
            i.instance.author = user
        return super().forms_valid(form,inlines)

或者，如果您还想在此 forms_valid 中定义 Customer 字段，您可以在 super 调用之后进行

你可以尝试这样的事情：

   def forms_valid(self, form, inlines):
        user = ExtendedUser.objects.get(user=self.request.user)
        form.instance.customerauthor = user
        customerObj = super().forms_valid(form,inlines)
        for i in inlines:
            i.instance.author = user
            i.instance.Customer = customerObj
        return customerObj

【讨论】：