Question

当我尝试使用http：// localhost：8000 / create /创建新帖子时，出现此错误。我找不到以为它们看起来相似的解决方案。我遵循一些博客教程

我不能在此处粘贴settings.py，因为帖子中有很多代码，但我认为settings.py很好，顺便说一句

我的模型。py（*我删除了一些可能不涉及的代码）

User = get_user_model()

class Author(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    profile_picture = models.ImageField()

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

class Post(models.Model):
    title = models.CharField(max_length=100)
    overview = models.TextField()
    detail = models.TextField()
    timestamp = models.DateTimeField(auto_now_add=True)
    content = RichTextUploadingField(config_name='post_ckeditor')
    comment_count = models.IntegerField(default=0)
    view_count = models.IntegerField(default=0)
    author = models.ForeignKey(Author, on_delete=models.CASCADE)
    thumbnail = models.ImageField()
    categories = models.ManyToManyField(Category)
    featured = models.BooleanField()
    previous_post = models.ForeignKey('self', related_name='previous', on_delete=models.SET_NULL, blank = True, null = True)
    next_post = models.ForeignKey('self', related_name='next', on_delete=models.SET_NULL, blank = True, null = True)

我的views.py

def get_author(user):
    qs = Author.objects.filter(user=user)
    if qs.exists():
        return qs[0]
    return None
    pass

def post_create(request):
    form = PostForm(request.POST or None, request.FILES or None)
    author= get_author(request.user)
    if request.method == 'POST':
        if form.is_valid():
            form.instance.author = author
            form.save()
            return redirect(reverse('post-detail', kwargs={
                'id': form.instance.id
                }))
    context = {
        'form': form
    }
    return render(request, 'post_create.html', context)
    pass

我的表格。py

from django import forms
from .models import Post, Comment


class PostForm(forms.ModelForm):
    content = forms.CharField
    class Meta:
        model = Post
        fields = ('title', 'overview', 'content', 'thumbnail', 'categories', 'featured', 'previous_post', 'next_post')

class CommentForm(forms.ModelForm):
    content = forms.CharField(widget=forms.Textarea(attrs={
        'class':'form-control',
        'placeholder':'Type your comment',
        'id':'usercomment',
        'rows':4
    }))
    class Meta:
        model = Comment
        fields = ('content', )

请帮助！

Answer 1

每当模型字段发生变化或添加或删除新模型时，都应进行迁移。如果不为null，则将默认对象传递给外键。

Answer 2

如果您尝试将request.user保存在作者字段中，则无需编写额外的方法即可。

if request.method == 'POST':
    if form.is_valid():
       post =form.save(commit=False)
       post.author = request.user
       post.save()
       return redirect(reverse('post-detail', kwargs={'id': post.id }))

/ create / NOT NULL约束处的IntegrityError失败：main_post.author_id

2 个答案: