如何使必需：模型 Django 中的布尔字段

Question

我有一个模型，其字段名为 is_student 和 is_teacher Student 和 Teacher 表单

is_teacher = models.BooleanField('teacher status', default=False)
is_student = models.BooleanField('student status', default=False)

我想确保这个字段是：

• 始终由用户检查True *必填

当前：is_teacher 在TeacherApplications 模型中

• 未选中时 - 将 0 保存到表单并继续。 （不好）

• 当选中给我这个错误：

ValueError 在 /register/teacher 处 int() 的无效文字与 base 10: ''

当前：is_student 在StudentProfile 模型中

• 当选中出现此错误

ValidationError at /register/ ["'on' 值必须为 True 或 错误。”]

• 当未选中时，它将 0 保存到表单并继续。 （再次，不好）

更新代码

---

上述错误消失了：每次我在检查 is_teacher/is_student 后尝试提交表单时都会出现新错误

IntegrityError at /register/ NOT NULL 约束失败： account_studentprofile.is_student

---

型号

class StudentProfile(models.Model):
    user = models.OneToOneField('Accounts', related_name='student_profile')
    # additional fields for students
    AMEB_Ratings = models.PositiveIntegerField(default=0)
    is_student = models.BooleanField('student status', default=False)



class TeacherApplications(models.Model):
    user = models.OneToOneField('Accounts', related_name='teacher_profile')
    # additional fields for teachers
    instrument = models.TextField(max_length=500, blank=True)
    skill = models.CharField(max_length=30, blank=True)
    experience_in_years = models.PositiveIntegerField(blank=True)
    is_teacher = models.BooleanField('teacher status', default=False)

查看

def registerStudent(request):
    # Once register page loads, either it will send to the server POST data (if the form is submitted), else if it don't send post data create a user form to register
    if request.method == "POST":
        user_form = UserForm(request.POST)
        form = StudentResistrationForm(request.POST)

        if form.is_valid() and user_form.is_valid():
            User = get_user_model()
            username = user_form.cleaned_data['username']
            email = user_form.cleaned_data['email']
            password = user_form.cleaned_data['password']
            new_user = User.objects.create_user(username=username, email=email, password=password)

            student = form.save(commit=False)
            student.user = new_user
            student.save()

            # Student_profile = StudentProfile()
            # Student_profile.user = new_user
            # Student_profile.AMEB_Ratings = request.POST['AMEB_Ratings']
            # Student_profile.is_student = request.POST.get('is_student', False)

            new_user.save()
            # Student_profile.save()
            # form.save()

            return redirect('/')
    else:
        #  Create the django default user form and send it as a dictionary in args to the reg_form.html page.
        user_form = UserForm()
        form = StudentResistrationForm()        

        # args = {'form_student': form, 'user_form': user_form }
    return render(request, 'accounts/reg_form_students.html', {'form_student': form, 'user_form': user_form })

def teacherApplication(request):
    # Once register page loads, either it will send to the server POST data (if the form is submitted), else if it don't send post data create a user form to register
    if request.method == "POST":
        user_form = UserForm(request.POST)
        form = TeacherRegistrationForm(request.POST)

        if form.is_valid() and user_form.is_valid():
            User = get_user_model()
            username = user_form.cleaned_data['username']
            email = user_form.cleaned_data['email']
            password = user_form.cleaned_data['password']
            new_user = User.objects.create_user(username=username, email=email, password=password)

            teacher = form.save(commit=False)
            teacher.user = new_user
            teacher.save()

            # Teacher_profile = TeacherApplications()
            # Teacher_profile.user = new_user
            # Teacher_profile.instrument = request.POST['instrument']
            # Teacher_profile.skill = request.POST['skill']
            # Teacher_profile.experience_in_years = request.POST['experience_in_years']
            # Teacher_profile.is_teacher = request.POST.get('is_teacher', False)

            new_user.save()
            # Teacher_profile.save()
            # form.save()

            return redirect('/')
    else:
        #  Create the django default user form and send it as a dictionary in args to the reg_form.html page.
        user_form = UserForm()
        form = TeacherRegistrationForm()  
    return render(request, 'accounts/reg_form_teachers.html', {'form_student': form, 'user_form': user_form })

表格

class StudentResistrationForm(forms.ModelForm):
    class Meta:
        model = StudentProfile
        fields = (  
            'AMEB_Ratings',
            'is_student',

        )

    def save(self, commit=True):
        user = super(StudentResistrationForm, self).save(commit=False)
        # user.first_name = self.cleaned_data['first_name']
        # user.last_name = self.cleaned_data['last_name']
        user.AMEB_Ratings = self.cleaned_data['AMEB_Ratings']

        if commit:
            user.save()

        return user


class TeacherRegistrationForm(forms.ModelForm):
    class Meta:
        model = TeacherApplications
        fields = (
            'instrument',
            'skill',
            'experience_in_years',
            'is_teacher',
        )

class UserForm(forms.ModelForm):
    class Meta:
        model = get_user_model()
        fields = ('username', 'email', 'password')

Answer 1

您可以将此字段添加到 StudentResistrationForm 和 TeacherRegistrationForm 并在 clean_fieldname 方法中为其添加自定义验证以使其成为必需：

StudentResistrationForm(ModelForm):
    class Meta:
        model = StudentRegistration
        fields = (
            'instrument',
            'skill',
            'experience_in_years',
            'is_student',
        )

    def clean_is_student(self):
        is_student = self.cleaned_data.get('is_student')
        if not is_student:
            raise forms.ValidationError('This field is required')
        return is_student  

除了从request.POST 获取原始数据之外，您还可以使用表单创建student 和teacher 对象：

new_user = User.objects.create_user(username=username, email=email, password=password)
teacher = form.save(commit=False)
teacher.user = new_user
teacher.save()