无法将关键字“id”解析为字段。选项有：完成、task_priority、text、user、user_id

Question

我正在处理一个 Todo 列表，该列表有不同的用户和他们自己的列表。 最初我的models.py为：

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



class Todo(models.Model):
    text = models.CharField(max_length=40, default='Test User')
    complete = models.BooleanField(default = False)
    task_priority = models.CharField(max_length=40, default='high')
    def __str__(self):
        return self.text

但是当我试图将单个用户与其自己的一组待办事项（文本字段）及其优先级和状态联系起来时。

我这样添加一对一字段：

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



class Todo(models.Model):
    user = models.OneToOneField(User,on_delete=models.CASCADE,primary_key='user_id') #new
    text = models.CharField(max_length=40, default='Test User')
    complete = models.BooleanField(default = False)
    task_priority = models.CharField(max_length=40, default='high')
    def __str__(self):
        return self.text

它抛出了这样的错误：

字段错误在 / 无法将关键字“id”解析为字段。选项有：完成、task_priority、text、user、user_id

我没有完全理解一对一字段的概念，并且查看在线教程我很困惑天气我需要制作另一个表并将其链接到 Todo 表或添加另一个带有一些主键的字段？

帮助我理解这个概念。 提前致谢。

编辑： views.py 文件：

from django.shortcuts import render, redirect
from .models import Todo
from .form import TodoForm,ContactForm
import datetime 
from django.conf import settings
from django.utils import timezone
from django.views.decorators.http import require_POST
from django.core.mail import send_mail, BadHeaderError
from django.http import HttpResponse, HttpResponseRedirect
import json



def index(request):
    todo_list = Todo.objects.order_by('id')
    form = TodoForm()
    mydate = datetime.datetime.now()

    context = {'todo_list': todo_list, 'form': form, 'mydate':mydate}

    return render(request,'todo/index.html',context)

def login(request):
    return render(request, 'todo/login.html')


@require_POST
def addTodo(request):
    form = TodoForm(request.POST)
    text_input = form.get_cleaned_data['text']
    priority_input = form.get_cleaned_data['task_priority']
    if form.is_valid():
        new_todo = Todo(text = text_input, task_priority = priority_input)
        # new_todo = Todo(text = request.POST['text'])
        new_todo.save()
    return redirect('index')

def completeTodo(request, todo_id):
    todo = Todo.objects.get(pk=todo_id)
    todo.complete = True
    todo.save()

    return redirect('index')

def deleteCompleted(request):
    Todo.objects.filter(complete__exact=True).delete()

    return redirect('index')

def deleteAll(request):
    Todo.objects.all().delete()

    return redirect('index')


def emailView(request):

    todo = Todo.objects.all();
    task_list = []
    status_list = []
    for item in todo:
        stritem=str(item)
        task_list.append(stritem)
        if item.complete == True:
            status_list.append('complete')
        else:
            status_list.append('incomplete')


    if request.method == 'GET':
        form = ContactForm()
    else:
        form = ContactForm(request.POST)
        if form.is_valid():

            from_email = form.cleaned_data['from_email']
            message = form.cleaned_data['message']
            #maillist = Todo.objects.all()
            email_list=dict(zip(task_list,status_list))
            strlist = json.dumps(email_list)
            content = message + strlist
            try:
                send_mail('Todo List', content ,settings.EMAIL_HOST_USER,[from_email])
            except BadHeaderError:
                return HttpResponse('Invalid header found.')
            return redirect('success')
    return render(request, "email.html", {'form': form})

def successView(request):
    return HttpResponse('Success! Thank you for your message.')

新模型.py：

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



class Todo(models.Model):
    user = models.OneToOneField(User,on_delete=models.CASCADE)
    text = models.CharField(max_length=40, default="")
    complete = models.BooleanField(default = False)
    task_priority = models.CharField(max_length=40, default='high')
    def __str__(self):
        return self.text

遇到

IntegrityError at /add NOT NULL 约束失败：todo_todo.user_id

Answer 1

这个：

user = models.OneToOneField(User,on_delete=models.CASCADE,primary_key='user_id')

根本没有做你认为的那样。 primary_key 需要一个布尔值，而不是字段名称，并且与关系根本无关。因为字符串'user_id' 不为空，所以这被解释为True，相当于：

user = models.OneToOneField(User,on_delete=models.CASCADE,primary_key=True)

这意味着user 现在是 Todo 模型的主键。这不是你想要的。

删除 primary_key 子句。