在DJANGO中保存之前从视图中检索ForeignKey

from django.db import models

class Category(models.Model):
    name = models.CharField(max_length=100)

class Product(models.Model):
    name = models.CharField(max_length=100)
    category = models.ForeignKey(Category, on_delete=models.CASCADE)

from django.shortcuts import get_object_or_404
from .models import Category, Product

def save_product(request):
    category_id = request.POST.get('category_id')
    category = get_object_or_404(Category, id=category_id)

    # 其他处理逻辑...

from django.shortcuts import get_object_or_404
from .models import Category, Product

def save_product(request):
    category_id = request.POST.get('category_id')
    category = get_object_or_404(Category, id=category_id)

    product = Product()
    product.name = request.POST.get('name')
    product.category = category
    product.save()

    # 其他处理逻辑...