Question

我有两种形式，我想根据第一种形式的一个字段自动填写第二种形式。我怎样才能做到这一点？我必须重写某些方法吗？

比赛表格

class MyModelChoiceField(forms.ModelChoiceField):
    def label_from_instance(self, obj):
        return obj.name

class TournamentCreationForm(forms.ModelForm):

    name                = forms.CharField(label='Name', widget=forms.TextInput(attrs={
                                    'class':'form-control',
                                    'placeholder': 'Enter the name of the tournament'}))
    dateStart           = forms.DateField(label='Beginning', widget=forms.DateInput(attrs={
                                    'class':'form-control',
                                    'placeholder': 'Enter the date of the beginning'}))
    dateEnd             = forms.DateField(label='Ending', widget=forms.DateInput(attrs={
                                    'class':'form-control',
                                    'placeholder': 'Enter the date of the end'}))
    nbMaxTeam           = forms.IntegerField(label='Number max of team', widget=forms.NumberInput(attrs={
                                    'class':'form-control',
                                    'placeholder':'Max 24'}))
    nameGymnasium       = forms.CharField(label='Name of the gymnasium', widget=forms.TextInput(attrs={
                                    'class':'form-control',
                                    'placeholder': 'Enter the name of the gymnasium'}))
    addressGymnasium    = forms.CharField(label='Address of the gymnasium', widget=forms.TextInput(attrs={
                                    'class':'form-control',
                                    'placeholder': 'Enter the address of the gymnasium'}))
    sport               = MyModelChoiceField(queryset=Sport.objects.all(), widget=forms.Select(attrs={
                                    'class':'form-control'}))

    class Meta:
        model   = Tournament
        fields  = [
            'name',
            'dateStart',
            'dateEnd',
            'nbMaxTeam',
            'nameGymnasium',
            'addressGymnasium',
            'sport'
        ]

体育表格

class SportEditForm(forms.ModelForm):
    timeMatch           = forms.DecimalField(label='Time for one match', widget=forms.NumberInput(attrs={
                                    'class':'form-control',
                                    'placeholder':'Enter the the time for one match',
                                    'step': 0.1}))
    nbpointpervictory   = forms.IntegerField(label='Points per Victory', widget=forms.NumberInput(attrs={
                                    'class':'form-control',
                                    'placeholder':'Enter the points for a victory'}))
    nbpointperdefeat    = forms.IntegerField(label='Points per Defeat', widget=forms.NumberInput(attrs={
                                    'class':'form-control',
                                    'placeholder':'Enter the points for a defeat'}))
    nbpointperdraw      = forms.IntegerField(label='Points per Draw', widget=forms.NumberInput(attrs={
                                    'class':'form-control',
                                    'placeholder':'Enter the points for a draw'}))
    nbset               = forms.IntegerField(label='Numebr of sets', widget=forms.NumberInput(attrs={
                                    'class':'form-control',
                                    'placeholder':'Enter the number of sets'}))
    nbpointperset       = forms.IntegerField(label='Points per set', widget=forms.NumberInput(attrs={
                                    'class':'form-control',
                                    'placeholder':'Enter the number of points for one set'}))
    class Meta:
        model   = Sport
        fields  = [
            'timeMatch',
            'nbpointpervictory',
            'nbpointperdefeat',
            'nbpointperdraw',
            'nbset',
            'nbpointperset'
        ]

我也有两种形式。在比赛表格中，我必须选择比赛的运动项目。现在可以，但是我想根据所选运动来更新我的sport_form字段。

这是我的观点：

def tournament_creation_view(request, *args, **kwargs): #*args, **kwargs
    form_tournament = TournamentCreationForm(request.POST or None)
    form_sport      = SportEditForm(request.POST or None)
    if form_tournament.is_valid() and form_sport.is_valid():
        instance = form_tournament.save(commit=False)
        instance.user = request.user
        instance.save()

    context = {
        'form_tournament': form_tournament,
        'form_sport': form_sport
    }
    return render(request, "tournament_creation.html", context)

我认为我必须重写一个方法，但是什么方法在哪里？在我的锦标赛表格中，我有一个名为“运动”的字段，它列出了我已经保存在数据库中的所有运动。选择一个后，我想自动填写运动表格的字段。

编辑：

“体育”是比赛形式的一个字段。这是一个ModelChoiceField，列出了所有已保存在数据库中的运动。我想做的是：当我选择一项运动时，我的另一项表单（体育表单）会自动用已经存在的数据填充。

如何从Django中的数据库自动填充表单？

0 个答案: