Django:如何在ModelChoiceField或单选按钮上执行必需的字段验证

from django import forms
from .models import YourModel

class YourForm(forms.Form):
    your_field = forms.ModelChoiceField(queryset=YourModel.objects.all())

class YourForm(forms.Form):
    your_field = forms.ModelChoiceField(queryset=YourModel.objects.all())

    def clean_your_field(self):
        your_field_value = self.cleaned_data.get('your_field')
        # 执行必要的字段验证逻辑
        if your_field_value is None:
            raise forms.ValidationError("必须选择一个选项")
        return your_field_value

from django.shortcuts import render
from .forms import YourForm

def your_view(request):
    if request.method == 'POST':
        form = YourForm(request.POST)
        if form.is_valid():
            # 执行其他逻辑
            pass
    else:
        form = YourForm()
    
    return render(request, 'your_template.html', {'form': form})