Question

这是我的models.py

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


class Catalog(models.Model):
    title = models.CharField(max_length=200)
    item = models.ManyToManyField(Item, blank=True, null=True)
    user = models.ForeignKey(User)
    pub_date = models.DateTimeField('date published')

    def __str__(self):
        return self.title

这是我的views.py

def catalog(request):
    # if this is a POST request we need to process the form data
    qs = Item.objects.filter(user = request.user)
    if request.method == 'POST':
        # create a form instance and populate it with data from the request:
        form = catalogForm(qs,request.POST)
        # check whether it's valid:
        if form.is_valid():
            title=form.cleaned_data['title']
            item=form.cleaned_data['item']
            user= request.user
            q = Catalog(title=title, pub_date=timezone.now(),user=user)
            q.save()
            q.item = item.values()
            return HttpResponseRedirect('/thanks/')

    # if a GET (or any other method) we'll create a blank form
    else:
        form = catalogForm(qs)

    return render(request, 'catalog/catalog.html', {'form': form})

现在item = models.ManyToManyField(Item, blank=True, null=True)创建2个表catalog_catalog和catalog_catalog_item。使用q.save()，我可以将数据插入到单个表catalog_catalog中，但我无法将数据插入catalog_catalog_item。

我在这里缺少什么。感谢您的帮助。

Answer 1

add()接受任意数量的参数，而不是它们的列表。

float

要将该列表扩展为参数，请使用add(obj1, obj2, obj3, ...)

将其用作评论中提到的（@EchoUA团队）

add(*[obj1, obj2, obj3])

Answer 2

您缺少第二次“save（）”调用。

q = Catalog(title=title, pub_date=timezone.now(),user=user)
q.save()
q.item = item.values()
q.save()       # you need this save as well

如何从views.py将数据插入django中的ManyToManyField

2 个答案: