Django 表单不呈现小部件

Question

我想在我的字段中添加占位符，但出于某种原因，这不起作用。当我查看页面源代码时，甚至没有占位符属性。

这是我的 forms.py:

class RegistrationForm(UserCreationForm):
    email = forms.EmailField(required=True, max_length=254)

    class Meta:
        model = User
        fields = ('username', 'email', 'password1', 'password2',)
        widgets = {
            'username' : forms.TextInput(attrs={'placeholder': 'Username'}),        
            'email' : forms.TextInput(attrs={'placeholder': 'Email'}),
            'password1' : forms.TextInput(attrs={'placeholder': 'Password'}),
            'password2' : forms.TextInput(attrs={'placeholder': 'Confirm Password'}),
        }

这是我用于 HTML:

的模板

<!DOCTYPE html>

{% extends 'base.html' %}
{% load staticfiles %}

{% block content %}
<section class="container">
  <div class="row centre-v">
    <div class="card login-card">
      <div class="main card-block">
        <h1>Sign up</h1>
        <div class="login-or">
          <hr class="hr-or">
        </div>
        <form action="." method="post" class="register-form">
          {% csrf_token %}
          {% for field in form %}
            <p>
              {{ field }}
              {% for error in field.errors %}
              <div class="alert alert-danger" role="alert"><strong>{{ error }}</strong></div>
              {% endfor %}
            </p>
          {% endfor %}
          <div class="btn-login">
            <input class="btn btn-info" type="submit" value="Register">
          </div>
        </form>
      </div>
    </div>
  </div>
</section>
{% endblock %}

Answer 1

根据 ModelForm 的 docs，Meta class 仅用于从基础模型生成字段。在 ModelForm class 中显式声明的字段不受 Meta 中设置的属性的影响。您在 class 中声明了 email，并且在继承的 UserCreationForm class 中声明了 password1 和 password2。（username 是自动生成的，因此您在 Meta class 中设置的小部件属性可能对该字段有效。）要为声明的字段设置属性，您可以使用 self.fields 字典.

class RegistrationForm(UserCreationForm):
    email = forms.EmailField(required=True, max_length=254)

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

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs):
        self.fields['username'].widget.attrs['placeholder'] = 'Username'
        self.fields['email'].widget.attrs['placeholder'] = 'Email'
        self.fields['password1'].widget.attrs['placeholder'] = 'Password'
        self.fields['password2'].widget.attrs['placeholder'] = 'Confirm Password'

Django 表单不呈现小部件

Django form not rendering widgets

html

python

forms

django

widget