联接查询仅从一个表中获取数据cakephp 3

Question

I am new to cakephp. I am usign query builder to fetch details from two tables using join in cakephp query builder.But the query i am writing is fetching details only from one table. Need help to get data from other table as well.

This is my code to fetch data by joining two tables:

public function edit($id = null) {

    $events_table = TableRegistry::get('Events');

    $events = $events_table->find('all') 
            ->hydrate(false)
            ->join([
            'CourseType'=>  [
                        'table'      => 'coursetype',
                        'type'       => 'LEFT',
                        'conditions' => 'Events.type = CourseType.coursetype_id',
                    ]                   
            ])->where(['Events.id' => $id]);

     $event = $events->toArray();       
     $this->set('event', $event);
}

As a result i am getting only details from events table. But i need data from coursetype also.Any help is appreciated. Thank you.

Answer 1

Manually adding joins won't cause any additional data to be selected, you'd have to do that on your own by specifying the fields to be selected via the select() method.

$events = $events_table
    ->find('all') 
    ->hydrate(false)
    ->select($events_table)
    // either add the fields one by one, or pass a table object
    // as above to select all fields of the table
    ->select(['CourseType.id', 'CourseType.xyz', /* ... */])
    // ...

I'd suggest to use use containments instead, ie setup the required association if not already present, and then simply use contain() :

$events = $events_table
    ->find('all') 
    ->hydrate(false)
    ->contain('CourseType')
    ->where(['Events.id' => $id]);

See also

• Cookbook > Database Access & ORM > Query Builder > Selecting Data
• Cookbook > Database Access & ORM > Query Builder > Loading Associations

Answer 2

您的解决方案在这里： CakePHP使用JOIN查找方法