Question

我有一个“团队”课程，一个“游戏”课程，一个“玩家”课程和一个“目标”课程。

考虑到我具有以下结构，如何注释每个“团队”的“目标”计数：

class Team(models.Model):
    name = models.CharField('Team name', max_length=255)

class Game(models.Model):
    team1 = models.ForeignKey(Team, verbose_name = 'Team 1')
    team2 = models.ForeignKey(Team, verbose_name = 'Team 2')

class Player(models.Model):
    team = models.ForeignKey(Team, verbose_name = 'Team')

class Goal(models.Model):
    player = models.ForeignKey(Player, verbose_name = 'Player')
    game = models.ForeignKey(Game, verbose_name = 'Game')

到目前为止，我已经尝试过：

Team.objects.annotate(nr_goals=Count('goal')).order_by('nr_goals')

如果需要，我还可以更改我的模型。

Answer 1

您已经在正确的道路上。试试：

Team.objects.annotate(nr_goals=Count('game__goal')).order_by('nr_goals')

您还可以使用Player模型关系。

Team.objects.annotate(nr_goals=Count('player__goal')).order_by('nr_goals')

FK的FK注释计数

1 个答案: