django/taggit-错误 : MyData objects need to have a primary key value before you can access their tags

Question

我正在尝试使用 django-taggit ( see )。这是我的代码中的内容:

模型.py

class MyData(models.Model):
    title = models.CharField(blank=True, max_length=50)
    .....
    tags = TaggableManager()

View .py

g = MyData(title=f_title)   
g.tags.add( "mytag" )
g.save()

出于某种原因，当我尝试保存标签和数据时出现此错误:

MyData objects need to have a primary key value before you can access their tags.

有什么想法吗？谢谢!

Answer 1

使用 MyData.objects.create(title=f_title) 将其保存到数据库并拥有一个 Id 然后访问标签

g = MyData.objects.create(title=f_title)  
g.tags.add( "mytag" )
g.save()