django restframework 多对多模型 —— python

模型 图书和作者是多对多关系

class Book(models.Model):

    book_name=models.CharField(max_length=40)

    price=models.DecimalField(max_digits=4,decimal_places=2)

    publish=models.ForeignKey(to="Publish",on_delete=models.CASCADE,related_name="publish")

    author=models.ManyToManyField(to="Author",related_name="author")



    class Meta:

        db_table="tbl_book"



    # def __str__(self):

    #     return self.book_name



class Publish(models.Model):

    publish_name=models.CharField(max_length=20)

    address=models.CharField(max_length=30)



    class Meta:

        db_table="tbl_publish"

    # def __str__(self):

    #     return self.publish_name



class Author(models.Model):

    sex_choices=[(0,"男"),(1,"女")]

    name=models.CharField(max