Python 在Django中保存ModelForm时，如何将users模型作为ForeignKey值传递？

模型文件：

from django.db import models
from django.conf import settings


class Book(models.Model):
    rel_user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, verbose_name="Posted By")
    title = models.CharField(max_length=256, verbose_name="Title")
    description = models.TextField(verbose_name="Description")
    price = models.IntegerField(verbose_name="Price")
    state = models.CharField(max_length=256, verbose_name="State")
    city = models.CharField(max_length=256, verbose_name="City")
    neighbourhood = models.CharField(max_length=256, verbose_name="Neighbourhood")
    phone = models.IntegerField(verbose_name="Phone Number")

    def __str__(self):
        return self.title + f" ({self.rel_user.username})"

表格文件：

from django.forms import ModelForm
from Books.models import Book


class BookForm(ModelForm):
    class Meta:
        model = Book
        fields = ['title', 'description', 'price', 'state', 'city', 'neighbourhood', 'phone']

视图文件：

from django.shortcuts import render, redirect
from Books.forms import BookForm
from django.contrib import messages


def sell(request):
    if request.method == "GET":
        form = BookForm()
    else:
        form = BookForm(request.POST, )
        if form.is_valid():
            form.save()
            messages.success("Successfully added!")
            return redirect('sell')
        else:
            messages.error("Please fill in all the fields.")
    return render(request, 'Books/sell.html', {"form": form})

每次用户提交表单时，我都希望ForeignKey的值由该用户模型填充。我该怎么做？ 假设用户John已经填写了表单。当他单击submit时，他输入的详细信息+他的用户模型应该进入该条目的数据库

def sell(request):
    if request.method == "POST":
        form = BookForm(request.POST)
        if form.is_valid():
            instance = form.save(commit=False)
            instance.rel_user = request.user
            instance.save()
            messages.success("Successfully added!")
            return redirect('sell')
        else:
            messages.error("Please fill in all the fields.")
    else:
         form = BookForm()
    return render(request, 'Books/sell.html', {"form": form}

---

request.user可以如上所述分配给rel_user

您可以将用户分配给表单的实例：

从django.shortcuts导入渲染，重定向 从Books.forms导入BookForm 从django.contrib导入消息

def sell(request):
    if request.method == 'GET':
        form = BookForm()
    else:
        form = BookForm(request.POST)
        form.instance.rel_user = request.user
        if form.is_valid():
            form.save()
            messages.success('Successfully added!')
            return redirect('sell')
        else:
            messages.error('Please fill in all the fields.')
    return render(request, 'Books/sell.html', {'form': form})

---

您的意思是，应该为rel_用户分配登录用户？是的，应该为rel_用户分配登录用户。