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')

以下是Artist模型如何：

and Here is how the Artist models looks like:

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

我可以创建一个分配给这个艺术家的mp3（我需要这样的查询例如。

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sth like this

)I have tried sth like this

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

但我没有

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

我明白错误，但仍然不知道如何解决这个问题。感谢任何帮助
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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