如何在Django的CharField中添加占位符？ [英] How do I add a placeholder on a CharField in Django?

问题描述

以这个非常简单的形式为例。

Take this very simple form for example.

class SearchForm(Form):
   q = forms.CharField(label='search')

在模板中呈现：

<input type="text" name="q" id="id_q" />

但是，我想将占位符属性添加到此字段中，值为搜索所以HTML将看起来像：

However, I want to add the 'placeholder' attribute to this field with a value of "Search" so that the HTML would look something like:

<input type="text" name="q" id="id_q" placeholder="Search" />

最好我想通过一个字典或一些东西将占位符值传递给表单类的CharField如：

Preferably I would like to pass the placeholder value in to CharField in the form class through a dictionary or something like:

q = forms.CharField(label='search', placeholder='Search')

什么是最好的方法来完成这个？

What would be the best way to accomplish this?

推荐答案

查看小部件文档。基本上它看起来像：

Look at the widgets documentation. Basically it would look like:

q = forms.CharField(label='search', 
                    widget=forms.TextInput(attrs={'placeholder': 'Search'}))

更多的写作，是的，但是分离可以更好地抽象出更复杂的情况。

More writing, yes, but the separation allows for better abstraction of more complicated cases.

您还可以声明一个小部件属性，其中包含一个<字段名称> => < widget instance> 直接在 ModelForm 子类的 Meta 上映射。

You can also declare a widgets attribute containing a <field name> => <widget instance> mapping directly on the Meta of your ModelForm sub-class.

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