Python Django：如何更改默认注册字段

我正在努力更改默认UserCreationForm-我能够通过创建子类添加一个额外字段：

class SignUpForm(UserCreationForm):
    display_name = forms.CharField(max_length=32, help_text='Your display name')

    class Meta:
        model = User
        fields = ('username', 'display_name', 'password1', 'password2', )

def register(request):
    if request.method == 'POST':
        form = SignUpForm(request.POST)
        if form.is_valid():
            user = form.save()
            user.refresh_from_db()
            user.profile.display_name = form.cleaned_data.get('display_name')
            user.save()
            raw_password = form.cleaned_data.get('password1')
            user = authenticate(username=user.username, password=raw_password)
            login(request, user)
            return redirect('user/home')
    else:
        form = SignUpForm()
    return header.views.show(request, 'userpanel/register.html', context={'form': form})

连同模板：

<form method="post">
    {% csrf_token %}
    {% for field in form %}
    <p>
        {{ field.label_tag }}<br>
        {{ field }}
        {% if field.help_text %}
        <small style="color: grey">{{ field.help_text | safe }}</small>
        {% endif %}
        {% for error in field.errors %}
        <p style="color: red">{{ error | safe }}</p>
        {% endfor %}
    </p>
    {% endfor %}
    <button type="submit">Sign up</button>
</form>

{%csrf_令牌%}
{%形式的字段为%}

{{field.label_tag}}

{{field}}
{%if field.help_text%}
{{field.help_text | safe}}
{%endif%}
{%字段中有错误。错误%}
{{error | safe}
{%endfor%}

{%endfor%}
注册

我能够创建以下页面：

---

但是我在更改页面上的描述文本时遇到了问题。现在，如果我想改变要求。150个字符或更少。仅限字母、数字和@/+/-/-。还有别的事，怎么做？

好吧，我想好了。通过以下方式列出表单的所有属性：

form = SignUpForm()
for d in dir(form):
    print(d)

通过反复试验，我发现您可以列出表单的字段：

form = SignUpForm()
for d in form.fields:
    print('field name:', d)
    print('field label:', form.fields[d].label)
    print('field text:', form.fields[d].help_text)
    print("")

返回：

field name: username
field label: Username
field text: Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.

field name: display_name
field label: None
field text: Your display name

field name: password1
field label: Password
field text: <ul><li>Your password can&#39;t be too similar to your other personal information.</li><li>Your password mus
t contain at least 8 characters.</li><li>Your password can&#39;t be a commonly used password.</li><li>Your password can&
#39;t be entirely numeric.</li></ul>

field name: password2
field label: Password confirmation
field text: Enter the same password as before, for verification.

我得到：

---

标记您的答案已接受，将问题标记为已解决！我可以在两天内完成。

x = form.fields['username']
x.label = "foo"
x.help_text = "bar"