Django-自定义注册表单（错误，唯一的电子邮件和管理员）

Question

first of all, I am new in programming with Django. Here is what I have:

The <form> inside my register.html template:

<form method='POST' action='/accounts/register/'>
   {% csrf_token %}
   {% for field in form %}
       {{ field.label_tag }}{{ field }} {{field.help_text}} {{field.errors}{}
   <br/>
   {% endfor %}
   <input type='submit' value='Register' />
</form>

This is inside my forms.py

class MyRegistrationForm(UserCreationForm):
email = forms.EmailField(required=True)
first_name = forms.CharField(required = True)
last_name = forms.CharField(required = True)
password1 = forms.RegexField(widget=forms.PasswordInput,
                            regex = r'[\w+]{8,}',
                            label = 'New password',
                            help_text = "Must be strong!",
                            error_messages = {'required' : "ASDASDA",
                                              'invalid' : "ZZZZZ"}
                            )
password2 = forms.RegexField(widget=forms.PasswordInput,
                            regex = r'[\w+]{8,}',
                            label = 'Re-enter password',
                            )

class Meta:
    model = User
    fields = ('last_name', 'first_name', 'username', 'email', 'password1', 'password2')

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

    if commit:
        user.save()

    return user

This is inside my views.py

def User_Register_View(request):
if request.method == 'POST':
    form = MyRegistrationForm(request.POST)
    if form.is_valid():
        form.save()
        register_success = "Account successfuly created!"
        return render(request,'index.html', locals())

args = {}
args.update(csrf(request))
args['form'] = MyRegistrationForm()

return render(request,'accounts/register.html',args)

My questions are the following:

1. {{field.errors}} is not working. No errors are printed. If I let all the fields of the form empty, and I click 'Register', no error is rendered.

2. If I add another field to this forum, "gender" as a CharField, will it create a column inside my DB for gender? ( I am working with the default sqlite3)

3. Is there a simple way to modify my code and make the 'User' field optional and, instead, make the 'Email' field be unique and required?

4. In the state in which my code is, where can I check for the unique property of my email in the DB? Is it inside my views.py, just before form.save() ?

Thank you. Let me know if you have any questions

Answer 1

def User_Register_View(request):

    if request.method == 'POST':
        form = MyRegistrationForm(request.POST)
        if form.is_valid():
          form.save()
          register_success = "Account successfuly created!"
          return render(request,'index.html', locals())
    else:
        form = MyRegistrationForm() # An unbound form

    args = {}
    args['form'] = form

    return render(request,'accounts/register.html',args)

1. {{field.errors}} now showing because you are not returning the validated form instance if validation failed. You always return a new instance of MyRegistrationForm. See above example.

2. adding fields to forms will not affect your db since only models maps to db tables

3. & 4. You need custom user model to do so, see here for example on how to do it