Django admin ManyToMany inlinehas no ForeignKey to错误

我正在为以下模型设置Django管理员:

class Quote(models.Model):                                                  
    author = models.CharField(max_length=100)                               
    quote = models.CharField(max_length=1000)                               
    tags = models.ManyToManyField('Tag')                                    

class Tag(models.Model):                                                    
    name = models.CharField(max_length=100)                                 

使用以下代码:

class TagInline(admin.TabularInline):                                                                                               
    model = Tag                                                             

class QuoteAdmin(admin.ModelAdmin):                                         
    list_display = ('author', 'quote')                                      
    inlines = (TagInline,)                                                  

class TagAdmin(admin.ModelAdmin):                                           
    pass                                                                    

admin.site.register(Quote, QuoteAdmin)                                      
admin.site.register(Tag, TagAdmin)

当try 查看管理页面以添加Quote时，页面显示错误<class 'quotes.models.Tag'> has no ForeignKey to <class 'quotes.models.Quote'>.在我添加内联之前，这并没有发生.有什么问题吗？如何正确添加Tag作为内联？

(I spent a good 20 minutes searching for an answer; I found similar questions but none of their answers worked for me.)个