Question

问题是当用户提交图片时我收到此错误。我想我明白为什么我会收到这个错误，因为即使我选择了一个董事会，董事会保管箱也没有验证。

IntegrityError at /picture/
pet_picture.board_id may not be NULLRequest Method: POST 
Request URL:  
Django Version: 1.4.3 
Exception Type: IntegrityError 
Exception Value: pet_picture.board_id may not be NULL 


Traceback:

File "C:\o\mysite\pet\views.py" in PictureCreator
  106.          picture = Picture.objects.create(user=request.user)

我认为问题出在我的PictureCreator函数的views.py

 def PictureCreator(request):
    if not request.user.is_authenticated():
        return HttpResponseRedirect(reverse('pet.views.LoginRequest'))

    if request.method == "POST":
        form = PictureForm(request.POST , request.FILES)
        if form.is_valid():
            picture = Picture.objects.create(user=request.user)
            picture.image = form.cleaned_data['image']
            picture.description = form.cleaned_data['description']
            picture.board = form.cleaned_data['board']
            picture.save()
    return render(request,'picture.html',{'form':PictureForm()})

我认为问题在这个特定的声明中它不对我的电路板保管箱有效。如何使其有效？ picture.board = form.cleaned_data ['board']

我的forms.py部分

class PictureForm(forms.ModelForm):
    board = forms.ModelChoiceField(queryset=Board.objects.all())

    class Meta:
        model = Picture
        fields = ('image','description','board',)

我的models.py

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

class Person(models.Model):
    user = models.ForeignKey(User)
    name = models.CharField(max_length=100)
    image = models.FileField(upload_to="images/",blank=True,null=True)


    def __unicode__(self):
        return self.name



class Picture(models.Model):
    user = models.ForeignKey(User)
    board = models.ForeignKey(Board)
    image = models.FileField(upload_to="images/",blank=True,null=True)
    description = models.TextField()
    def __unicode__(self):
        return self.description

我该如何解决这个问题？谢谢你帮助我：D

Answer 1

picture = Picture(user=request.user)
picture.image = form.cleaned_data['image']
picture.description = form.cleaned_data['description']
picture.board = form.cleaned_data['board']
picture.save()

Answer 2

看起来您的问题就在这一行：

picture = Picture.objects.create(user=request.user)

根据您的模型，创建Board时需要Picture。解决此问题的一种方法是将上述行更改为：

picture = Picture(user=request.user)

现在，您必须在视图中明确调用save。

Django pet_picture.board_id可能不是NULL

2 个答案: