[英]Laravel/Eloquent - Order By a Model's Relationship Without Using Table Names
I have a Person
eloquent model that belongsTo
an Address
. 我有一个
Person
雄辩的模型belongsTo
一个Address
。 My Laravel version is 4.2.5 and I am using PostgreSQL. 我的Laravel版本是4.2.5,我正在使用PostgreSQL。
class Person extends Eloquent {
public function address() {
return $this->belongsTo('Address');
}
}
My aim is to get a collection of Person
resources that are sorted by the address_1 field of their related Address
model. 我的目的是获得
Person
资源的集合,这些资源按其相关Address
模型的address_1字段排序。
I can accomplish this by referencing table names as show below, but I want to do it instead with Eloquent relationships, since I do not want to deal with tables for abstraction purposes. 我可以通过如下表所示引用表名来完成此操作,但是我想用雄辩的关系来做到这一点,因为我不想出于抽象目的处理表。
Person::join('addresses', 'persons.id', '=', 'addresses.person_id')
->orderBy('address_1', 'asc')->get();
I have attempted the following Eloquent method without success. 我尝试了以下口才的方法,但没有成功。
Person::with('address')->whereHas('address', function($q)
{
$q->orderBy('address_1', 'asc');
})->get();
This query fails with the error message: 该查询失败,并显示错误消息:
Grouping error: 7 ERROR: column \"addresses.address_1\" must appear in the
GROUP BY clause or be used in an aggregate function
In response to this, I tried adding this line above the orderBy
statement which causes the query to succeed, but the ordering has no effect on the resulting Person
collection. 响应于此,我尝试在
orderBy
语句上方添加此行,从而使查询成功,但是排序对结果Person
集合没有影响。
$q->groupBy('address_1');
I would much appreciate a solution where I do not have to reference table names if it is possible. 我非常感谢一个解决方案,在这种解决方案中,如果可能的话,我不必引用表名。 I have exhausted all resources on this subject, but surely this is a common use case.
我已经用尽了所有关于此主题的资源,但是可以肯定的是,这是一个常见的用例。
Here you go: 干得好:
$person = new Person;
$relation = $person->address();
$table = $relation->getRelated()->getTable();
$results = $person->join(
$table, $relation->getQualifiedForeignKey(), '=', $relation->getQualifiedOtherKeyName()
)->orderBy($table.'.address_1', 'asc')
->get();
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