如何顯示此Django窗體錯誤？

Question

當您清理和驗證彼此相關的字段時，如何在Django表單中顯示錯誤？我有一個Django窗體，其中顯示像這樣的see image這樣的字段錯誤。它要求我顯示窗體的錯誤屬性：

# signup.html 
<form action="{% url 'create-account' %}" method="post">{% csrf_token %} 
    <div class="form-group"> 
     {% if create_account_form.errors %}   # <- attribute 
      <p class="errornote"> 
      {% if form.errors.items|length == 1 %} 
       Please correct the error below. 
      {% else %} 
       Please correct the errors below. 
      {% endif %} 
      </p> 
     {% endif %} 
    </div> 
    <div class="form-group"> 
     {{ create_account_form.username.errors }}  # <- attribute 
     {{ create_account_form.username }} 
    </div> 
    <div class="form-group"> 
     {{ create_account_form.password1.errors }} 
     {{ create_account_form.password1 }} 
    </div> 
    <div class="form-group"> 
     {{ create_account_form.password2.errors }} 
     {{ create_account_form.password2 }} 
    </div> 
    <div class="form-group"> 
     {{ create_account_form.user_type_cd.errors }} 
     <label for="id_user_type_cd" id="user_type_cd">This account is for a</label> 
     &nbsp;&nbsp; 
     {{ create_account_form.user_type_cd }} 
    </div> 
    <div class="form-group"> 
     By clicking "Sign up" you agree to the <a href="{% url 'terms-of-service' %}">Terms of Service</a>. 
    </div> 
    <input type="submit" class="btn btn-primary" value="Sign Up"> 
</form> 

我使用error_messages參數自定義表單錯誤消息：

# account/forms.py 
class CreateAccountForm(forms.Form): 
    USER_TYPE_CHOICES = (...) 
    username = forms.CharField(
     error_messages = {'required': "Username is required."} 
    ) 
    password1 = forms.CharField(
     error_messages = {'required': "Password is required."} 
    ) 
    password2 = forms.CharField(
     error_messages = {'required': "Passwords must match."} 
    ) 
    user_type_cd = forms.ChoiceField(
     choices = USER_TYPE_CHOICES, 
     error_messages={'required': 'Account type is required'} 
    ) 

的問題是，當我嘗試從自定義顯示錯誤信息clean方法，錯誤信息不能正確呈現，因爲它不在error_messages參數中。請參閱image。

# account/forms.py 
def clean(self): 
    """ Check that passwords match. """ 
    super(forms.Form, self).clean() 
    if 'password1' in self.cleaned_data and 'password2' in self.cleaned_data: 
     if self.cleaned_data['password1'] != self.cleaned_data['password2']: 
      self._errors['password1'] = "Passwords must match." 
    return self.cleaned_data 

，我怎麼把我的乾淨的方法鑑定錯誤進入密碼1場的error_messages說法讓我的模板格式，喜歡它與其他表單字段不會使得它是否正確？我試圖在乾淨的方法中做下面的事情，但都沒有辦法工作，我不知道如何解決這個問題。

# This doesn't work. It assumes that I've defined password1's error_messages like this: 
password1 = forms.CharField(
    error_messages = {'required': "Password is required", 'mismatch': "Passwords must match."} 
) 
... 
from django.forms import util 
raise util.ValidationError(self.password1.error_messages['mismatch']) 

# This doesn't work either. 
raise forms.ValidationError("Passwords must match.") 

謝謝！

Answer 1

你已經完成了，在你的第一個片段。我不確定你想要用其他代碼做什麼。

但是，作爲已經工作的代碼的替代方法，您可以使用add_error方法。請參閱Cleaning and validating fields that depend on each other下的完整討論。