python - ValueError : Cannot create form field for 'author' yet, 因为其相关模型 'settings.AUTH_USER_MODEL' 尚未加载

Question

我正在尝试使用自定义身份验证模型建立一个基本博客。我试图让一个简单的表格发挥作用，但不知何故我无法使其发挥作用。我不确定是什么导致了错误。这是一个新的应用程序，也是我正在开发的一个新项目。

我尝试从文档中引用，但我不确定我做错了什么。我该如何修复这个错误？提前致谢

文档:https://docs.djangoproject.com/en/1.11/topics/auth/customizing/#changing-to-a-custom-user-model-mid-project

类似问题:Cannot create form field for 'created_by' yet, because its related model 'users.User' has not been loaded yet

我当前的代码

模型.py

class User(AbstractUser):
  pass

class Post(models.Model):
   author = models.ForeignKey('settings.AUTH_USER_MODEL')
   title = models.CharField(max_length=200)
   text = models.TextField()
   created_date = models.DateTimeField(default=timezone.now)
   published_date = models.DateTimeField(blank=True, null=True)

表单.py:

from blog.models import User

class PostForm(forms.ModelForm):
image = forms.CharField(
    widget=forms.FileInput(attrs={'class': 'form-control'}),required=False)


class Meta():
    model = Post
    fields = ('author','title', 'text','image')
    widgets = {
        'title': forms.TextInput(attrs={'class': 'textinputclass'}),
         }

View .py

from blog.forms import PostForm, CommentForm

class CreatePostView(LoginRequiredMixin,CreateView):
  ...
  form_class = PostForm
  model = Post
  def form_valid(self,form):
    if self.request.POST:
        post = form.save()
        return HttpResponseRedirect('/')

设置.py:

AUTH_USER_MODEL = 'blog.User'

admin.py:

from .models import User
from django.contrib.auth.admin import UserAdmin
admin.site.register(User,UserAdmin)

Answer 1

您应该使用settings.AUTH_USER_MODEL，而不是字符串'settings.AUTH_USER_MODEL':

class Post(models.Model):
    author = models.ForeignKey(settings.AUTH_USER_MODEL)