Question

在型号中：

class MyTeam(models.Model):
    captain_first_team = models.ForeignKey(FirstTeamPlayer, on_delete=models.SET_NULL, null=True, blank=True, related_name="captain_first_team_set")
    team_player_first_team = models.ManyToManyField(FirstTeamPlayer, blank=True, related_name="team_player_first_team_set")

在视图中：

amar_team = get_object_or_404(MyTeam, pk=team_id)
first_team_player = get_object_or_404(amar_team.team_player_first_team, pk=player_id)
amar_team.objects.create(captain_first_team=first_team_player)

在这里，在MyTeam模型中，我有ManyToManyField字段和ForeignKey字段。我想从ManyToManyField字段数据中将数据添加到ForeignKey字段中。

我也尝试：

amar_team.captain_first_team.add(first_team_player)
amar_team.captain_first_team.save(first_team_player)

但是它不起作用。我该怎么办？

Answer 1

就像错误所述一样，您不能不通过模型* instance8访问.objects。仅通过模型类。

因此，您应该将其定义为：

MyTeam.objects.create(captain_first_team=first_team_player)

，而不是通过 ~~amar_team.objects.create(...)~~ 。

但是，根据您的评论，您想要更新captain_first_team中的amar_team，因此可以将外键设置为：

amar_team = get_object_or_404(MyTeam, pk=team_id)
first_team_player = get_object_or_404(amar_team.team_player_first_team, pk=player_id)
amar_team.captain_first_team = first_team_player
amar_team.save()

从ManyToManyField数据在ForgeinKey上添加数据时，“无法通过模型实例访问Manager”

1 个答案: