我试图在下拉组合中将两个连接字段组合为valueField。检查https://book.cakephp.org/3.0/en/orm/retrieving-data-and-resultsets.html#finding-key-value-pairs和How do I create a keyValue pair (display field) by combining/having two fields in CakePHP 3?后,我尝试了以下方法:
这有效:
$authorities = $this->Books->Authorities->find('list', [
'valueField' => 'author.name'])
->contain(['Authors', 'AuthorTypes']);
这也有效:
$authorities = $this->Books->Authorities->find('list', [
'valueField' => 'author_type.name'])
->contain(['Authors', 'AuthorTypes']);
但这不是:
$authorities = $this->Books->Authorities->find('list', [
'valueField' => function ($row) {
return $row['author.name'] . ' - ' . $row['author_type.name'];
}])
->contain(['Authors', 'AuthorTypes']);
我不明白为什么。有任何想法吗? :)
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你的代码应该是:
$authorities = $this->Books->Authorities->find('list', [
'valueField' => function ($row) {
return $row->author->name . ' - ' . $row->author->name;
}])
->contain(['Authors', 'AuthorTypes']);
这叫做Customize Key-Value Output
。 $ row参数是一个对象而不是一个简单的array_object。