Django：如果未登录，则显示字段

Question

我拥有以下应有的表单。但是，我希望仅在用户未登录时显示“currentCharities”字段：

class SelectTwoTeams(BootstrapForm): 

    team1 = forms.ModelChoiceField(queryset=StraightredTeam.objects.none(), empty_label=None, 
           widget=forms.Select(attrs={"class":"select-format"})) 
    team2 = forms.ModelChoiceField(queryset=StraightredTeam.objects.none(), empty_label=None, 
           widget=forms.Select(attrs={"class":"select-format"})) 
    currentCharities = forms.ModelChoiceField(queryset=Charity.objects.filter(enabled=1), empty_label=None, 
               widget=forms.Select(attrs={"class": "select-format"})) 

我已经尝试过很多选项，但没有成功。是否有捷径可寻？非常感谢，艾伦。

下面是表格的其余部分柜面它可以帮助：

def __init__(self, *args, **kwargs): 
    user = kwargs.pop('user') 
    self.currentSelectedTeam1 = kwargs.pop('currentSelectedTeam1', None) 
    self.currentSelectedTeam2 = kwargs.pop('currentSelectedTeam2', None) 
    self.currentfixturematchday = kwargs.pop('currentfixturematchday', None) 
    self.currentCampaignNo = kwargs.pop('currentCampaignNo', None) 
    super(SelectTwoTeams, self).__init__(*args, **kwargs) 

    cantSelectTeams = UserSelection.objects.select_related().filter(~Q(fixtureid__fixturematchday=self.currentfixturematchday),campaignno=self.currentCampaignNo,) 

    if not cantSelectTeams: 
     queryset = StraightredTeam.objects.filter(currentteam = 1).order_by('teamname') 
    else: 
     queryset = StraightredTeam.objects.filter(currentteam = 1).exclude(teamid__in=cantSelectTeams.values_list('teamselectionid', flat=True)).order_by('teamname') 

    teamsAlreadyPlaying = StraightredFixture.objects.filter(soccerseason=1025, fixturematchday=self.currentfixturematchday, fixturedate__lte = timezone.now()) 
    postponedGames = StraightredFixture.objects.filter(soccerseason=1025, fixturematchday=self.currentfixturematchday,fixturestatus = "P") 

    queryset = queryset.exclude(teamid__in=teamsAlreadyPlaying.values_list('home_team_id', flat=True)).order_by('teamname') 
    queryset = queryset.exclude(teamid__in=teamsAlreadyPlaying.values_list('away_team_id', flat=True)).order_by('teamname') 
    queryset = queryset.exclude(teamid__in=postponedGames.values_list('home_team_id', flat=True)).order_by('teamname') 
    queryset = queryset.exclude(teamid__in=postponedGames.values_list('away_team_id', flat=True)).order_by('teamname') 

    self.fields['team1'].queryset = queryset 
    self.fields['team2'].queryset = queryset 
    self.fields['team1'].initial = self.currentSelectedTeam1 
    self.fields['team2'].initial = self.currentSelectedTeam2 

    self.fields['team1'].label = False 
    self.fields['team2'].label = False 
    self.fields['currentCharities'].label = False 

def clean(self): 
    cleaned_data = self.cleaned_data # individual field's clean methods have already been called 
    team1 = cleaned_data.get("team1") 
    team2 = cleaned_data.get("team2") 
    if team1 == team2: 
     raise forms.ValidationError("You may not pick the same teams, please try again.") 

    return cleaned_data 

Answer 1

从窗体类中删除currentCharities。在__init__方法，检查user.is_authenticated和创建字段如果用户没有登录。

class SelectTwoTeams(BootstrapForm): 

    def __init__(self, *args, **kwargs): 
     user = kwargs.pop('user') 
     super(SelectTwoTeams, self).__init__(*args, **kwargs) 

     if not user.is_authenticated: # user.is_authenticated() in Django <= 1.9 
      self.fields['currentCharities'] = forms.ModelChoiceField(queryset=Charity.objects.filter(enabled=1))