更改Django模型形式的默认占位符的ForeignKey [英] Changing the default placeholder in a Django model form for a ForeignKey

问题描述

我的代码设置如下：

models.py

class Category(models.Model):
    name = models.CharField(max_length=255)

class Product(models.Model):
    category = models.ForeignKey(Category)

forms.py

class ProductForm(forms.ModelForm):
    class Meta:
        model = Product
        fields = ('category',)
        widgets = {
            #'category' : forms.TextInput(attrs={'placeholder' : 'Select the category'}),
        }

基本上，现在，没有小部件，我得到 ----- --- 作为该字段的占位符。但是，我想获得选择类别，该怎么办？谢谢！

Basically, right now, without the widgets part, I get -------- as the placeholder for this field. However, I want to get 'Select the category', how can I do this? Thanks!

推荐答案

您可以使用 empty_label 字段：

class ProductForm(forms.ModelForm):
    category = forms.ModelChoiceField(queryset=Category.objects.all(), empty_label='Select the category')

    class Meta:
        model = Product

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