如何将类、id、占位符属性添加到 django 模型表单中的字段

Question

我有一个像下面这样的 django 模型

models.py

class Product(models.Model):
    name = models.CharField(max_length = 300)
    description = models.TextField(max_length = 2000)
    created = models.DateTimeField(auto_now_add = True)
    updated = models.DateTimeField(auto_now = True)

    def __unicode__(self):
        return self.name

forms.py

class ProductForm(ModelForm):
    class Meta:
        model = Product
        exclude = ('updated', 'created')

product_form.py（只是一个例子）

 <form enctype="multipart/form-data" action="{% url 'add_a_product' %}" method="post">
         <div id="name">
           {{form.name}}
         </div> 
         <div id="description">
           {{form.description}}
         </div> 
   </form> 

其实我想显示/渲染如下的 html 输出

<input id="common_id_for_inputfields" type="text" placeholder="Name" class="input-calss_name" name="Name">

<input id="common_id_for_inputfields" type="text" placeholder="Description" class="input-calss_name" name="description">

那么最后如何在上述代码中的模型表单字段中添加属性（id、placeholder、class）？

Answer 1

我知道这是一个老问题，但如果有人仍然希望将自定义类添加到他的所有表单字段中，那么您可以使用这一行

class ProductForm(ModelForm):
    class Meta:
        model = Product
        exclude = ('updated', 'created')
def __init__(self, *args, **kwargs):
    super(ProductForm, self).__init__(*args, **kwargs)
    custom_attrs = {
        'class': 'form-control',
        'toggle-data': 'mydiv',
    }
    # adds our custom_attrs to each element of the form 
    [self.fields[i].widget.attrs.update(custom_attrs) for i in self.fields]

Answer 2

我真的很喜欢 Dmitriy Sintsov 的回答，但它不起作用。这是一个有效的版本：

def __init__(self, *args, **kwargs):
    super().__init__(*args, **kwargs)
    for field in iter(self.fields):
        self.fields[field].widget.attrs.update({
            'class': 'form-control'
    })

更新

添加这个条件更好

if self.fields[field].widget.__class__.__name__ in ('AdminTextInputWidget' , 'Textarea' , 'NumberInput' , 'AdminURLFieldWidget', 'Select'): 
     self.fields[field].widget.attrs.update({ 'class': 'form-control' })

Answer 3

优秀 mariodev 答案的略微修改版本，将引导类添加到所有表单字段，因此我不必手动为每个字段重新创建表单输入小部件（短 Python 3.x super()）：

class ProductForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        for field in self.fields:
            self.fields[field].widget.attrs.update({
                'class': 'form-control'
            })

Answer 4

你可以更新forms.py如下

class ProductForm(ModelForm):
    class Meta:
        model = Product
        exclude = ('updated', 'created')
        widgets={
                   "name":forms.TextInput(attrs={'placeholder':'Name','name':'Name','id':'common_id_for_imputfields','class':'input-class_name'}),
                   "description":forms.TextInput(attrs={'placeholder':'description','name':'description','id':'common_id_for_imputfields','class':'input-class_name'}),
                }  

Answer 5

add_class 过滤器用于将 CSS 类添加到表单字段：

 {% load widget_tweaks %}     
    <form enctype="multipart/form-data" action="{% url 'add_a_product' %}" method="post">
                 <div id="name">
                   {{form.name|add_class:"input-calss_name"}}
                 </div> 
                 <div id="description">
                   {{form.description|add_class:"input-calss_name"}}
                 </div> 
           </form> 

django-widget-tweaks library

Answer 6

为了回答 Derick Hayes 的问题，我创建了一个扩展 forms.ModelForm 的类 BasicForm，它将引导类添加到扩展它的每个表单中。

对于我的表单，我只是扩展 BasicForm 而不是模型表单，并自动在所有表单上获取引导类。我更进一步，将这些类附加到任何可能已经存在的自定义 css 类中。

class BaseModelForm(forms.ModelForm):

def __init__(self, *args, **kwargs):
    super(BaseModelForm, self).__init__(*args, **kwargs)
    # add common css classes to all widgets
    for field in iter(self.fields):
        #get current classes from Meta
        classes = self.fields[field].widget.attrs.get("class")
        if classes is not None:
            classes += " form-control"
        else:
            classes = "form-control"
        self.fields[field].widget.attrs.update({
            'class': classes
        })

Answer 7

您可以执行以下操作：

class ProductForm(ModelForm):
    name = forms.CharField(label='name ', 
            widget=forms.TextInput(attrs={'placeholder': 'name '}))

Answer 8

字段 id 应该由 django 自动生成，以覆盖其他字段：

class ProductForm(ModelForm):
    class Meta:
        model = Product
        exclude = ('updated', 'created')

    def __init__(self, *args, **kwargs):
        super(ProductForm, self).__init__(*args, **kwargs)
        self.fields['name'].widget.attrs\
            .update({
                'placeholder': 'Name',
                'class': 'input-calss_name'
            })

Answer 9

您可以执行以下操作：

#forms.py
class ProductForm(ModelForm):
    class Meta:
        model = Product
        exclude = ('updated', 'created')

    def __init__(self, *args, **kwargs):
        super(ProductForm, self).__init__(*args, **kwargs)
        self.fields['description'].widget = TextInput(attrs={
            'id': 'myCustomId',
            'class': 'myCustomClass',
            'name': 'myCustomName',
            'placeholder': 'myCustomPlaceholder'})