SilverStripe DropdownField 默认值设置为空白

Question

谁能帮我在 SilverStripe 3 的 DropdownField 中将空白设置为默认值？

目前这是我的代码：

DropdownField::create(
    'HowHear',
    'How did you hear of this job?',
    array(
        'Indeed' => 'Indeed',
        'Caterer' => 'Caterer',
        'Gumtree' => 'Gumtree',
        'Word of mouth' => 'Word of mouth',
        'Other' => 'Other',
    )
)->addExtraClass('full-width'),

Answer 1

在 SilverStripe 3 和 4 中 DropdownField 有一个函数 setEmptyString('') 将设置默认的空字符串：

DropdownField::create(
    'HowHear',
    'How did you hear of this job?',
    [
        'Indeed' => 'Indeed',
        'Caterer' => 'Caterer',
        'Gumtree' => 'Gumtree',
        'Word of mouth' => 'Word of mouth',
        'Other' => 'Other',
    ]
)->addExtraClass('full-width')->setEmptyString('')

SilverStripe DropdownField 默认值设置为空白

SilverStripe DropdownField default value set to blank

php

silverstripe

dropdown