Python 匹配查询不存在-Django

我正在注册页面上工作。我扩展了django的用户模型，添加了额外的字段。我有两种与OnetoOnefield相关的表单。我得到了这个错误

DoesNotExist at /register/
Influencer matching query does not exist.

我认为我做错的是同时创建用户和影响者模型

My models.py文件：

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


class Influencer(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    bio = models.TextField(blank=True, null=True)
    ig_url = models.CharField(max_length=100, blank=True, null=True)

    def __str__(self):
        return f"{self.user.first_name} {self.user.last_name}"


@receiver(post_save, sender=User)
def create_influencer(sender, instance, created, **kwargs):
    if created:
        Influencer.objects.create(user=instance)


@receiver(post_save, sender=User)
def save_influencer(sender, instance, **kwargs):
    instance.influencer.save()

class UserForm(forms.ModelForm):
    class Meta:
        model = User
        fields = ('first_name', 'last_name', 'email')


class InfluencerProfileForm(forms.ModelForm):
    class Meta:
        model = Influencer
        fields = ('bio', 'ig_url')

def register(request):
    user_form = UserForm()
    profile_form = InfluencerProfileForm()

    if request.method == 'POST':
        user_form = UserForm(request.POST, instance=request.user)
        profile = Influencer.objects.get(user=request.user)
        profile_form = InfluencerProfileForm(request.POST, instance=profile)
        if user_form.is_valid() and profile_form.is_valid():
            user_form.save()
            profile_form.save()
            messages.success(request, 'Your profile was successfully updated!')
            return redirect('settings:profile')
        else:
            messages.error(request, 'Please correct the error below.')

    return render(request, 'accounts/register.html', {
        'user_form': user_form,
        'profile_form': profile_form
    })

My forms.py文件：

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


class Influencer(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    bio = models.TextField(blank=True, null=True)
    ig_url = models.CharField(max_length=100, blank=True, null=True)

    def __str__(self):
        return f"{self.user.first_name} {self.user.last_name}"


@receiver(post_save, sender=User)
def create_influencer(sender, instance, created, **kwargs):
    if created:
        Influencer.objects.create(user=instance)


@receiver(post_save, sender=User)
def save_influencer(sender, instance, **kwargs):
    instance.influencer.save()

class UserForm(forms.ModelForm):
    class Meta:
        model = User
        fields = ('first_name', 'last_name', 'email')


class InfluencerProfileForm(forms.ModelForm):
    class Meta:
        model = Influencer
        fields = ('bio', 'ig_url')

def register(request):
    user_form = UserForm()
    profile_form = InfluencerProfileForm()

    if request.method == 'POST':
        user_form = UserForm(request.POST, instance=request.user)
        profile = Influencer.objects.get(user=request.user)
        profile_form = InfluencerProfileForm(request.POST, instance=profile)
        if user_form.is_valid() and profile_form.is_valid():
            user_form.save()
            profile_form.save()
            messages.success(request, 'Your profile was successfully updated!')
            return redirect('settings:profile')
        else:
            messages.error(request, 'Please correct the error below.')

    return render(request, 'accounts/register.html', {
        'user_form': user_form,
        'profile_form': profile_form
    })

My views.py文件：

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


class Influencer(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    bio = models.TextField(blank=True, null=True)
    ig_url = models.CharField(max_length=100, blank=True, null=True)

    def __str__(self):
        return f"{self.user.first_name} {self.user.last_name}"


@receiver(post_save, sender=User)
def create_influencer(sender, instance, created, **kwargs):
    if created:
        Influencer.objects.create(user=instance)


@receiver(post_save, sender=User)
def save_influencer(sender, instance, **kwargs):
    instance.influencer.save()

class UserForm(forms.ModelForm):
    class Meta:
        model = User
        fields = ('first_name', 'last_name', 'email')


class InfluencerProfileForm(forms.ModelForm):
    class Meta:
        model = Influencer
        fields = ('bio', 'ig_url')

def register(request):
    user_form = UserForm()
    profile_form = InfluencerProfileForm()

    if request.method == 'POST':
        user_form = UserForm(request.POST, instance=request.user)
        profile = Influencer.objects.get(user=request.user)
        profile_form = InfluencerProfileForm(request.POST, instance=profile)
        if user_form.is_valid() and profile_form.is_valid():
            user_form.save()
            profile_form.save()
            messages.success(request, 'Your profile was successfully updated!')
            return redirect('settings:profile')
        else:
            messages.error(request, 'Please correct the error below.')

    return render(request, 'accounts/register.html', {
        'user_form': user_form,
        'profile_form': profile_form
    })

---

我认为问题有两个方面。第一，你有一个信号，它会在你所有的地方创建一个影响者实例。第二，你假设在创建一个影响者实例之前，你会有一个影响者实例。您可以删除信号并尝试使用以下代码：

def register(request):
    user_form = UserForm(request.POST or None)
    profile_form = InfluencerProfileForm(request.POST or None)

    if request.method == 'POST':
        if request.user.is_authenticated:
            user_form = UserForm(request.POST, instance=request.user)
            try:
                profile_form = InfluencerProfileForm(request.POST, instance=request.user.influencer)  # due to OneToOne relation, it will work
            except:
               pass
        if user_form.is_valid() and profile_form.is_valid():
            user = user_form.save()
            profile = profile_form.save(commit=False)
            profile.user = user
            profile.save()
            messages.success(request, 'Your profile was successfully updated!')
            return redirect('settings:profile')
        else:
            messages.error(request, 'Please correct the error below.')

    return render(request, 'accounts/register.html', {
        'user_form': user_form,
        'profile_form': profile_form
    })

---

这意味着对于给定的

请求，没有
影响者
。用户

。我进行了更改，得到了错误：relatedObjectsDoesNotExister at/register/user没有影响者。这意味着您没有该用户的影响者对象。您需要手动创建它，或者添加一个try-catch。我已经更新了我希望在提交表单时创建影响者对象的答案。我应该改变信号吗@ruddraIt为您正在测试的特定用户显示，该用户没有影响者对象。因此，通过这个实现，它将在提交表单时为该用户创建一个新的影响者对象。但是如果你创建了一个新用户，那么它会自动创建这个用户的影响者实例。你能建议修改我的原始代码吗？我认为该信号将为用户创建影响者对象。看来我错了。