Django的。此函数的关键字参数无效。多对多 [英] Django. Invalid keyword argument for this function. ManyToMany

问题描述

我有这个错误：

人是此功能的无效关键字参数

class Passage(models.Model):
    name= models.CharField(max_length = 255)
    who = models.ForeignKey(UserProfil)

class UserPassage(models.Model):
    passage = models.ForeignKey(Passage)
    people = models.ManyToManyField(UserProfil, null=True)

class UserProfil(models.Model):
    user = models.OneToOneField(User)
    name = models.CharField(max_length=50)

我尝试：

def join(request):
    user = request.user
    user_profil = UserProfil.objects.get(user=user)
    passage = Passage.objects.get(id=2)
    #line with error
    up = UserPassage.objects.create(people= user_profil, passage=passage)
    return render_to_response('thanks.html')

如何正确地做到这一点？谢谢！

How does one do this correctly? Thanks!

推荐答案

您需要保存/创建对象，才能添加 ManyToMany 关系：

You need to save/create the object before you can add ManyToMany relationships:

up = UserPassage.objects.create(passage=passage)
up.people.add(user_profil)

ManyToMany 关系不保存为表格中的列。请阅读第一个回复，以获得良好的解释：

ManyToMany relationships aren't saved as columns in your table. Read the first reply here for good explanation:

Django ManyToMany字段未在模型中创建

@DanielRoseman：因为ManyToMany isn'一个字段，至少不存在一个数据库列。这是与链接表的关系。你会发现一个名为myapp_teacher_subjects的表已经被创建，外键有老师和主题。

@DanielRoseman: Because a ManyToMany isn't a field, at least not one that exists as a database column. It's a relationship with a linking table. You'll find that a table named myapp_teacher_subjects has been created, with foreign keys to both teacher and subjects.

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