/ profile /中的RelatedObjectDoesNotExist

如何解决/ profile /中的RelatedObjectDoesNotExist

我正在尝试发送信号，即用户创建了它自动为用户创建配置文件的帐户，但是我认为我在创建signal.py时遇到了麻烦，它注册了用户但未为用户创建配置文件用户

views.py

from django.shortcuts import render,redirect 
from django.contrib.auth.decorators import login_required
from .forms import UpdateUserForms,ProfileUpdateForm
from login.forms import UserRegisterForm
from django.contrib import messages
# Create your views here.
@login_required
def profile(request):
    if request.method == 'POST':
        u_form = UpdateUserForms(request.POST,instance=request.user)
        p_form = ProfileUpdateForm(request.POST,request.FILES,instance=request.user.profile)

        if u_form.is_valid() and p_form.is_valid():
            u_form.save()
            p_form.save() 
            messages.success(request,f'Your account is updated!')
            return redirect('profile')
        
    else:
        u_form = UpdateUserForms(instance=request.user)
        p_form = ProfileUpdateForm(instance=request.user.profile)

        context = {
        'u_form': u_form,'p_form': p_form
        }
    return render(request,'profile.html',context)

def register(request):
    form = UserRegisterForm(request.POST)
    if form.is_valid():
        form.save()
        username = form.cleaned_data.get('username')
        messages.success(request,f'Account Registeration Successful!!! for { username }')
        return redirect('home')
    else:
        form = UserRegisterForm()
        
    return render(request,'register.html',{'form': form})

signal.py 以便在用户注册后发送信号自动创建用户配置文件

from django.db.models.signals import post_save
from django.contrib.auth.models import User
from django.dispatch import receiver
from .models import Profile
#to create new profile 
@receiver (post_save,sender=User)
def create_profile(sender,instance,created,**kwargs):
    if created:
        Profile.objects.create(user=instance)

#to update profile
@receiver(post_save,sender=User)
def save_profile(sender,**kwargs):
    instance.profile.save()

models.py

from django.db import models
from django.contrib.auth.models import User
from PIL import Image
# Create your models here.
class Profile(models.Model):
    user = models.OneToOneField(User,on_delete=models.CASCADE)
    image = models.ImageField(default='default.jpg',upload_to='profiles')

    def __str__(self):
         return f'{self.user.username} profile'
    
    def save(self):
        super().save() #to save the files comming from parent class
        img = Image.open(self.image.path)
        if img.height >300 or img.width > 300:
            output_size =(300,300)
            img.thumbnail(output_size)
            img.save(self.image.path)

forms.py

from django import forms
from django.contrib.auth.models import User
from .models import Profile
class UpdateUserForms(forms.ModelForm):
    email = forms.EmailField()
    class Meta:
        model = User
        fields = ['username','email']

class ProfileUpdateForm(forms.ModelForm):
    class Meta:
        model = Profile
        fields = ['image']

apps.py

from django.apps import AppConfig


class UserConfig(AppConfig):
    name = 'user'

    def ready(self):
        import user.signal

我认为我的signal.py没有发送信号来创建配置文件 而且我对信号发送过程感到困惑

解决方法

尝试一下：

将您的个人档案模型中的保存方法更改为：

def save(self,*args,**kwargs):
    super(Profile,self).save(*args,**kwargs)
    img = Image.open(self.image.path)
    if img.height > 300 or img.width > 300:
        output_size = (300,300)
        img.thumbnail(output_size)
        img.save(self.image.path)

将视图中的注册方法更改为：

def register(request):
    if request.method == 'POST':
        form = UserRegisterForm(request.POST)
        if form.is_valid():
            form.save()
            username = form.cleaned_data.get('username')
            messages.success(request,f'Account Registeration Successful!!! for { username }')
            return redirect('home')
    else:
        form = UserRegisterForm()
    return render(request,'register.html',{'form':form})

将您的信号（保留导入）更改为：

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

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

将您的应用更改为：

from django.apps import AppConfig

class UsersConfig(AppConfig):
    name = 'user'

    def ready(self):
        import user.signals

将users.apps.UsersConfig添加到您的INSTALLED_APPS。

此外，您还应该将UpdateUserForms重命名为UserUpdateForm，并将signal.py重命名为signals.py。