django 外键保存 [英] django foreign key save

问题描述

我有这样的模型.

class Mp3(models.Model):
    title=models.CharField(max_length=30)
    artist=models.ForeignKey('Artist')

Artist 模型如下所示:

and Here is how the Artist models looks like:

class Artist(models.Model):
    name=models.CharField(max_length=100,default="Unknown")

我已经创建了 id 为 1 的艺术家.如何创建分配给该艺术家的 mp3?(我需要它来进行这样的查询，例如.

I have created Artist with id 1. How I can create a mp3 that is assigned to this artist?(I want need it for query like this for eg.

mp3=Mp3.objects.get(id=50)
mp3.artist

)我试过这样的东西

newMp3=Mp3(title="sth",artist=1)

但我得到了比

ValueError: Cannot assign "1": "Mp3.artist" must be a "Artist" instance.

我明白这个错误，但仍然不知道如何解决这个问题.谢谢你的帮助最好的问候

I understand the error but still don't know how to solve this. Thanks for any help Best Regards

推荐答案

artist = Artist.objects.get(id=1)  
newMp3 = Mp3(title="sth", artist=artist)

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