WTForms 我可以在初始化字段时添加占位符属性吗? [英] WTForms Can I add a placeholder attribute when I init a field?

问题描述

我想向 WTForms 中的字段添加占位符属性.我该怎么做?

I want to add a placeholder attribute on to the field in WTForms. How can I do it?

abc = TextField('abc', validators=[Required(), Length(min=3, max=30)], placeholder="test")

以上代码无效

如何添加带有值的占位符属性?

How can I add a placeholder attribute with value?

推荐答案

已针对 WTForms 2.1 更新

从 WTForms 2.1(2015 年 12 月)开始，您现在可以通过将 render_kw= 参数用于字段构造函数来设置渲染关键字.

You can now as of WTForms 2.1 (December 2015) set rendering keywords by using the render_kw= parameter to the field constructor.

所以该字段看起来像:

abc = StringField('abc', [InputRequired()], render_kw={"placeholder": "test"})

注意虽然这是可能的；它确实开始在代码和演示之间架起桥梁；所以要明智地使用它！

Note while this is possible; it does start to bridge the line between code and presentation; so use it wisely!

(旧答案，对于早于 WTForms 2.1 的版本仍然适用)

placeholder 在 WTforms 2.0.x 及更低版本的 Python 构造函数中不受支持.

placeholder is not supported in the Python constructor in WTforms 2.0.x and below.

但是，您可以在模板中轻松完成此操作:

However, you can do this easily in your template:

{{ form.abc(placeholder="test") }}

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