CakePHP - 使用contain获取关联数据

find()

belongsTo

hasOne

select

where

contain

//As an option to find()
$this->Articles->find('all', [
'contain' => ['Authors', 'Comments']
]);

//As a method on the query object
$this->Articles->find()
->contain(['Authors', 'Comments'])
->all();

//多级关联
$this->Articles->find()
->contain(['Authors'=>['Profiles'], 'Comments'])
->all();
//or
$this->Articles->find()
->contain(['Authors.Profiles', 'Comments'])
->all();

//Rest the containments on a query
$query = $this->Articles->find();
$query->contain(['Authors', 'Tags'], true);

//Authors hasMany Articles
//结果集中的关联Model数据（articles）为多维数组
$this->Authors
->find()
->select(['id', 'name'])
->contain([
'Articles' => [
'fields' => ['id', 'title', 'author_id'], //必须包含外键
'conditions' => ['Articles.title LIKE' => '%测试%'],
'sort' => ['Articles.created' => 'DESC'] //sort, not order
]
])
->all();

//Articles belongsTo Authors
//结果集中的关联Model数据（author）为一维数组
$this->Articles
->find()
->select(['id', 'title']) //外键不必须
->contain([
'Authors' => function($q) { //Callback形式，Prior to 3.5
return $q->select(['id', 'name']);
}
])
->all();

//3.5+
->contain('Authors', function($q) {
return $q->...;
});