django - Django ifequal が動作しない

Question

これは私の登録フォームです:

class RegistrationForm(forms.Form):
    username = forms.CharField(label='Username', max_length=30)
    email = forms.EmailField(label='Email')
    password1 = forms.CharField(label='Password', widget=forms.PasswordInput())
    password2 = forms.CharField(label='Password (Again)', widget=forms.PasswordInput())

def clean_password2(self):
    if 'password1' in self.cleaned_data:
        password1 = self.cleaned_data['password1']
        password2 = self.cleaned_data['password2']
        if password1 == password2:
            return password2
    raise forms.ValidationError('Passwords do not match.')

def clean_username(self):
    username = self.cleaned_data['username']
    if not re.search(r'^\w+$', username): #checks if all the characters in username are in the regex. If they aren't, it returns None
        raise forms.ValidationError('Username can only contain alphanumeric characters and the underscore.')
    try:
        User.objects.get(username=username) #this raises an ObjectDoesNotExist exception if it doesn't find a user with that username
    except ObjectDoesNotExist:
        return username #if username doesn't exist, this is good. We can create the username
    raise forms.ValidationError('Username is already taken.')

これは私のテンプレートです：

{% if form.errors %}

    {% for field in form %}
        {% if field.label_tag == "Password (Again)" %}
            <p>The passwords which you entered did not match.</p>
        {% else %}
            {{ field.label_tag }} : {{ field.errors }}
        {% endif %}
    {% endfor %}
{% endif %}

基本的に言いたい

The passwords which you entered did not match.

Django が password2 フィールドのエラーを返した場合。私は登録フォームでそれを言いました

password2 = forms.CharField(label='Password (Again)'

しかし、Djangoはelseステートメントに直接進み、行を実行すると

{{ field.label_tag }} : {{ field.errors }}

Webブラウザを確認すると、

Password (Again) : This field is required.

そう

field.label_tag

等しい

"Password (Again)"

右？どうして私の

if field.label_tag == "Password (Again)"

ステートメントが true と評価されていませんか?