Django - OneToOneField 不断返回 None

Question

我的 OneToOneField 不断返回 None。我尝试访问我的网站，以便表单可以自动将帖子的作者作为当前登录的人。我环顾四周，发现 OneToOneField 可以做到这一点。当我实际上在 User 模型中有用户时，它会一直返回 None 。地球上发生了什么？Models.py: - 这是主要问题发生的地方from django.db import modelsfrom datetime import datetimefrom django import formsfrom django.forms import ModelFormfrom django.contrib.auth.models import Userfrom django.conf import settingsfrom django.contrib.auth import get_user_modelclass MainPost(models.Model):    post_author = models.OneToOneField(User, on_delete=models.CASCADE)    post_title = models.CharField(max_length=200)    post_content = models.TextField()    post_published = models.DateTimeField("date published", default=datetime.now())    def __str__(self):        return self.post_titleclass MainPostForm(ModelForm):    class Meta:        model = MainPost        fields = ["post_title", "post_content", "post_author"]        readonly_fields = "post_published"Views.py - 重要的是底部的 create_request()from django import formsfrom django.contrib.auth.forms import UserCreationFormfrom django.contrib.auth.models import Userclass NewUserForm(UserCreationForm):    email = forms.EmailField(required=True)    class Meta:        model = User        fields = ("username", "email", "password1", "password2")    def save(self, commit=True):        user = super(NewUserForm, self).save(commit=False)        user.email = self.cleaned_data["email"]        if commit:            user.save()        return user

Answer 1

尝试这个：

def create_request(request):

    if request.method == 'POST':

        # create a form instance and populate it with data from the request:

        form = MainPostForm(request.POST)

        # check whether it's valid:

        if form.is_valid():

            main_post = form.save(commit=False)

            main_post.post_author = request.user

            main_post.save()

            return redirect("mymainapp:homepage")

    form = MainPostForm()

    return render(request, "trymysite/create.html", {"form":form})