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

问题描述

以这个非常简单的表格为例:

Take this very simple form for example:

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

这在模板中呈现:

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

但是，我想将 placeholder 属性添加到该字段，其值为 Search，以便 HTML 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" />

最好我想通过字典或类似的东西将占位符值传递给表单类中的 CharField:

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')

实现这一目标的最佳方法是什么?

What would be the best way to accomplish this?

推荐答案

查看 widgets 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，但分离允许更好地抽象更复杂的情况.

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

您还可以声明包含 的 widgets 属性；=><widget instance> 直接映射到 ModelForm 子类的 Meta.

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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