Laravel嵌套关系
我在laravel中很难建立起非常嵌套的关系。
所需的行为如下,
现在的问题是事件和人员之间有一些表格。
这是有效的查询!
SELECT persons.id, persons.firstname,
persons.lastname,
event_scores.score
FROM events
JOIN cities
ON cities.id = events.city_id
JOIN companies
ON cities.id = companies.city_id
JOIN persons
ON companies.id = persons.company_id
JOIN event_scores
ON event_scores.person_id = persons.id
WHERE event_scores.event_id = 1
GROUP BY persons.id
这些是我的关系
事件模型
class Event extends Eloquent{
protected $table = 'events';
public function city()
{
return $this->belongsTo('City');
}
}
城市模型
class City extends Eloquent{
protected $table = 'cities';
public function companies()
{
return $this->hasMany('Company');
}
public function event()
{
return $this->hasMany('Event');
}
}
公司模式
class Company extends Eloquent { protected $table = 'companies';
public function persons()
{
return $this->hasMany('Person');
}
public function city()
{
return $this->belongsTo('City');
}
}
人物模型
class Person extends Eloquent{
protected $table = 'persons';
public function company()
{
return $this->belongsTo('Company');
}
public function eventscore()
{
return $this->belongsToMany('Event', 'event_scores', 'person_id', 'event_id')
->withPivot('score')
->withTimestamps();
}
}
我尝试过的
return Event::with('city')->with('company')->get();
和
return Event::with('city') ->whereHas('companies', function($query) use ($company_id){
$query->where('company_id', $company_id);
})->get();
还有很多其他可能性,我真的很坚持。在laravel中实现这种嵌套关系链接如此困难吗?
谢谢!
回答:
return Event::with('city.companies.persons')->get();
如果只想从persons
表中选择某些字段,请使用以下命令:
return Event::with(['city.companies.persons' => function ($query) { $query->select('id', '...');
}])->get();
以上是 Laravel嵌套关系 的全部内容, 来源链接: utcz.com/qa/406917.html