Django TypeError：字段“id”需要一个数字

Question

我一直在尝试允许员工用户将作业发布到数据库，但是我不断遇到上述问题。我尝试过设置data['id'] = 0/''以及删除表和 makemigrations/migrate。models.pyfrom django.db import modelsfrom teachers.models import Teacherclass Homework(models.Model):  title = models.CharField(max_length=100)  descripiton = models.CharField(max_length=500)  due = models.DateField()  teacher = models.OneToOneField(      Teacher, null=True, blank=True, on_delete=models.CASCADE)  def __str__(self):    return self.titleform.pyfrom django import formsclass DateInput(forms.DateInput):    input_type = 'date'class HomeworkForm(forms.Form):    title = forms.CharField(label='Title', max_length=100)    descripiton = forms.CharField(label='Descripiton', max_length=500)    due = forms.DateField(label='Due', widget=DateInput)views.pydef homework(request):    if request.user.is_authenticated & request.user.is_staff:        if request.method == 'POST':            data = request.POST.copy()            data['teacher'] = request.user.username            request.POST = data            print(request.POST)            form = HomeworkForm(request.POST)            if form.is_valid():                post = Homework(form)                post.save()                messages.info(request, 'Form sent')                print('worked')                return render(request, 'index/index.html')            else:                print('error in form')                form = HomeworkForm()                return render(request, 'dashboard/setHomework.html', {'form': form})        else:            form = HomeworkForm()            return render(request, 'dashboard/setHomework.html', {'form': form})    else:        return redirect('index')

Answer 1

您是否尝试使用 data['teacher'] = request.user 而不是 data['teacher'] = request.user.username ？

Answer 2

你不需要使用request.POST.copy(),request.POST已经是一本字典了。

Answer 3

我很欣赏这些答案。我设法通过将表单转换为模型表单来解决这个问题，因为该表单模型更适合这种情况，因为模型字段直接映射到输入。

新形式.py

from homework.models import Homework

from django import forms

class HomeworkForm(forms.ModelForm):

    class Meta:

        model = Homework

        fields = ['title', 'description', 'due']

        widgets = {

            'due': forms.DateInput(format=('%m/%d/%Y'), attrs={'label': 'due date', 'type': 'date'}),

        }