我有一个特定的请求,要在用户之间建立关联。这让我感到困惑,如何减少重复的关联,查询和结果?
起点看起来像这样?
// UsersTable
$this->belongsToMany('Users', [
'through' => 'Connections',
]);
如何在一个查询中获取所有关联,无论用户是否键入" user_from"或" user_to"场?
答案 0 :(得分:3)
如何使用别名?
您的users
表格:
class UsersTable extends Table
{
public function initialize(array $config)
{
$this->hasMany('ToConnections', [
'className' => 'Connections',
'foreignKey' => 'user_to'
]);
$this->hasMany('FromConnections', [
'className' => 'Connections',
'foreignKey' => 'user_from'
]);
}
}
和你的connections
表:
class ConnectionsTable extends Table
{
public function initialize(array $config)
{
$this->belongsTo('ToUsers', [
'className' => 'Users',
'foreignKey' => 'user_to'
]);
$this->belongsTo('FromUsers', [
'className' => 'Users',
'foreignKey' => 'user_from'
]);
}
}
然后,您可以根据需要使用contain()
加载关联的模型。
$query = $conections->find()->contain([
'ToUsers',
'FromUsers'
]);
$recipients = TableRegistry::get('users');
$query = $recipients->find()->contain([
'ToConnections.FromUsers',
]);