如何添加与ManyToManyField相关的另一个字段？

Question

class Team(models.Model):
    college = models.CharField(max_length=20)
    image = models.FileField(upload_to='documents/',null=True)


    def __str__(self):
        return self.college  

  class Athletics(Match):
        time = ?
        player = models.ManyToManyField(Player, related_name='player')
        game_level = models.CharField(max_length=256, null=True, choices=LEVEL_CHOICES) # like semi-final, final etc
        game_specific = models.CharField(max_length=256,null=True, choices=EVENT_CHOICES) #like Men's Shot Put or Men's Triple Jump etc

        def __str__(self):
            return str(self.game_level)

我正在为一个体育赛事制作一个田径运动模型。我有一个现有的播放器模型，其中我列出了球员的名字和他们的球队。现在，您可以看到，我已经添加了球员场作为ManyToManyField来选择4-5球员比赛。现在，我需要每个球员的完成时间来判断谁有资格进入下一轮。只在这种模式下可以做到这一点吗？还是我得再加一个模型？帮帮我!

Answer 1

你需要一个中间模型之间的球员和运动员，以记录特定的信息，多到多的关系，这两个模型。请阅读多到多关系的额外字段。

class PlayeAthletics(models.Model):
    player = models.ForeignKey(Player, on_delete=models.CASCADE)
    athletics = models.ForeignKey(Athletics, on_delete=models.CASCADE)
    time = models.IntegerField()

class Athletics(Match):
    player = models.ManyToManyField(Player, through='PlayerAthletics')