从Django注册页面将额外的字段值保存到数据库中

Question

我设法获得了一个额外的字段-“登录”页面上的state_name（使用forms.ModelForm），但是我正在努力将其保存在数据库中。

我有2个数据库连接，默认数据库用于保留Django表，而project_db用于保留程序表，这是否引起了问题？或带有forms.py文件？

下面是forms.py文件。

class UsersRegisterForm(forms.ModelForm):
    class Meta:
        model = User
        fields = [
            "username",
            "state_name",
            "email",
            "confirm_email",
            "password",
        ]

    username = forms.CharField()
    state_name = forms.ModelChoiceField(queryset=SchPartneredStates.objects.all(),empty_label=None)
    email = forms.EmailField(label="Email")
    confirm_email = forms.EmailField(label="Confirm Email")
    password = forms.CharField(widget=forms.PasswordInput)

    def __init__(self, *args, **kwargs):
        super(UsersRegisterForm, self).__init__(*args, **kwargs)
        self.fields['username'].widget.attrs.update({
            'class': 'form-control',
            "name": "username"})
        self.fields['state_name'].widget.attrs.update({
            'class': 'form-control',
            "name": "state_name"})
        self.fields['email'].widget.attrs.update({
            'class': 'form-control',
            "name": "email"})
        self.fields['confirm_email'].widget.attrs.update({
            'class': 'form-control',
            "name": "confirm_email"})
        self.fields['password'].widget.attrs.update({
            'class': 'form-control',
            "name": "password"})

    def clean(self, *args, **keyargs):
        email = self.cleaned_data.get("email")
        confirm_email = self.cleaned_data.get("confirm_email")
        username = self.cleaned_data.get("username")
        state_name = self.cleaned_data.get("state_name")
        password = self.cleaned_data.get("password")

        if email != confirm_email:
            raise forms.ValidationError("Email must match")

        email_qs = User.objects.filter(email=email)
        if email_qs.exists():
            raise forms.ValidationError("Email is already registered")

        username_qs = User.objects.filter(username=username)
        if username_qs.exists():
            raise forms.ValidationError("User with this username already registered")

        if len(password) < 8:  # you can add more validations for password
            raise forms.ValidationError("Password must be greater than 8 characters")

        return super(UsersRegisterForm, self).clean(*args, **keyargs)