Question

在我的记分卡报名表上，我只希望用户从列入名单的球员中选择该比赛。如果有一个字段，我就可以成功地使用。

form.fields['player'].queryset = PlayerShortlist.objects.filter(team=userteam, fixture=fixture_id)

但是当我在formset_factory上应用它时，我无法获得结果。

my forms.py

class TossForm(forms.Form):
    toss_won_by = forms.BooleanField()
    bat_first = forms.BooleanField()

class InningsForm(forms.Form):
    player = forms.ModelChoiceField(
        PlayerShortlist.objects.all()
    )
    status = forms.ChoiceField(choices=OUT_CHOICES, initial='DNB')
    score = forms.IntegerField(initial=0)
    balls_faced = forms.IntegerField(initial=0)

my views.py

@login_required
def scorecard(request, team_id, fixture_id):
    template = get_template('cricket/scorecard.html')
    tossform = TossForm()
    #inningform = InningsForm()
    InningsForms = formset_factory(InningsForm, extra=11)
    inningsforms = InningsForm()
    inningsforms.fields['player'].queryset = PlayerShortlist.objects.filter(team=Team.objects.get(id=1), fixture=fixture_id)

    page_vars = Context({
        'loggedinuser': request.user,
        'tossform': tossform,
        'inningsforms': inningsforms,
    })
    crsfcontext = RequestContext(request, page_vars)
    output = template.render(crsfcontext)
    return HttpResponse(output)

它给了我错误。

'InningsFormFormSet'对象没有属性'fields'

感谢

//优素福

哦，我环顾四周，看来formfield_callback可以用于我想要的东西，但是当我使用它时，我的views.py就像

def update_field(field, **kwargs):
        if field.name == 'players':
            field.queryset = PlayerShortlist.objects.filter(team=Team.objects.get(id=team_id), fixture=fixture_id)

    InningsFormset = formset_factory(InningsForm, extra=11, formfield_callback)

它给了我

formset_factory（）得到了一个意外的关键字参数'formfield_callback'

Answer 1

请记住：表单集包含表单列表。所以这个：

inningsforms.fields['player'].queryset = PlayerShortlist.objects.filter(team=Team.objects.get(id=1), fixture=fixture_id)

应该是：

qs = PlayerShortlist.objects.filter(team=Team.objects.get(id=1), fixture=fixture_id)

# force execution of the queryset once and for all
list(qs)

for form in inningsforms.forms:
    form.fields['player'].queryset = qs

另外，formfield_callback是modelformset_factory（和modelform_factory）的参数，而不是formset_factory。看看它是如何使用的：

def modelformset_factory(model, form=ModelForm, formfield_callback=None,
                         formset=BaseModelFormSet,
                         extra=1, can_delete=False, can_order=False,
                         max_num=None, fields=None, exclude=None):
    """  
    Returns a FormSet class for the given Django model class.
    """
    form = modelform_factory(model, form=form, fields=fields, exclude=exclude,
                             formfield_callback=formfield_callback)
    FormSet = formset_factory(form, formset, extra=extra, max_num=max_num,
                              can_order=can_order, can_delete=can_delete)
    FormSet.model = model
    return FormSet

请参阅，formfield_callback由modelformset_factory代理到modelform_factory。

formset_factory并更新字段以仅显示已过滤的项目

1 个答案: