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Question

我有模式：

class Player(models.Model) : 
    ... 
    teams = models.ManyToManyField("Team", through="PlayerTeam") 

class Team(models.Model) : 
    ... 
    players = models.ManyToManyField("Player", through="PlayerTeam") 

class PlayerTeam(models.Model) : 
    player = models.ForeignKey(Player) 
    team = models.ForeignKey(Team) 
    date_begin = models.DateField() 
    date_end = models.DateField(blank=True, null=True) 

我想誰在玩在選擇球隊所有球員（DATE_END爲空）。我嘗試這樣做：

team = get_object_or_404(Team, pk=id) 
players = team.players.filter(date_end__isnull=True) 

，但它不工作，因爲現場 'DATE_END' 是不是在播放模式

Answer 1

使用此：

players = team.playerteam_set.filter(date_end__isnull=True).values_list('player', flat=True)