返回ManyToMany字段

Question

如何從ManyToMany字段返回對象？或者我如何訪問與Book有關的作者？提前致謝。我的models.py是

class Author(models.Model): 
    first_Name = models.CharField(max_length=100) 
    last_Name = models.CharField(max_length=100) 

    def __unicode__(self): 
     return 'Author: ' + self.first_Name + ' ' + self.last_Name 

class Book(models.Model): 
    title = models.CharField(max_length=200) 
    author = models.ManyToManyField('Author') 

    def __unicode__(self): 
     return 'Book: ' + self.title 

Answer 1

您可以通過訪問book_set從Author得到Book：

Book.get(title="A book").author.all() 

：

Author.get(first_Name="Someone").book_set.all() # would return a list of all books 
Author.get(first_Name="Someone").book_set.get(...) # would a book 

同樣，你可以通過訪問Book的author變量得到作者

等