有没有办法在laravel中合并两个关系?
这就是它现在的设置方式,但是有没有一种方法可以同时返回合并的两个呢?
public function CompetitionsHome() {
return $this->HasMany( 'Competition', 'home_team_id' );
}
public function CompetitionsGuest() {
return $this->HasMany( 'Competition', 'guest_team_id' );
}
public function Competitions() {
// return both CompetitionsHome & CompetitionsGuest
}
发布于 2014-06-12 20:32:14
尝试使用getter方法获取属性,该方法返回从关系返回的合并集合。
public function getCompetitionsAttribute($value)
{
// There two calls return collections
// as defined in relations.
$competitionsHome = $this->competitionsHome;
$competitionsGuest = $this->competitionsGuest;
// Merge collections and return single collection.
return $competitionsHome->merge($competitionsGuest);
}
或者,您可以在返回集合之前调用其他方法以获取不同的结果集。
public function getCompetitionsAttribute($value)
{
// There two calls return collections
// as defined in relations.
// `latest()` method is shorthand for `orderBy('created_at', 'desc')`
// method call.
$competitionsHome = $this->competitionsHome()->latest()->get();
$competitionsGuest = $this->competitionsGuest()->latest()->get();
// Merge collections and return single collection.
return $competitionsHome->merge($competitionsGuest);
}
发布于 2016-04-15 17:08:22
如果您更喜欢merge()方法来组合两个集合(关系),它将覆盖具有相同索引键的元素,因此您将丢失从一个关系中获得的一些数据。
您应该选择push()方法,该方法通过将一个集合推送到另一个集合的末尾来创建新的数组键
下面是一个示例:
public function getCompetitionsAttribute($value) {
$competitionsHome = $this->competitionsHome;
$competitionsGuest = $this->competitionsGuest;
// PUSH ONE TO OTHER!
return $competitionsHome->push($competitionsGuest);
}
发布于 2019-09-18 06:08:26
我已经创建了一个使用视图合并关系的包:
https://github.com/staudenmeir/laravel-merged-relations
首先,在迁移中创建合并视图:
use Staudenmeir\LaravelMergedRelations\Facades\Schema;
Schema::createMergeView(
'competitions',
[(new YourModel)->CompetitionsHome(), (new YourModel)->CompetitionsGuest()]
);
然后定义关系:
class YourModel extends Model
{
use \Staudenmeir\LaravelMergedRelations\Eloquent\HasMergedRelationships;
public function competitions()
{
return $this->mergedRelationWithModel(Competition::class, 'competitions');
}
}
像使用任何其他关系一样使用它:
$model->competitions;
$model->competitions()->paginate();
YourModel::with('competitions')->get();
https://stackoverflow.com/questions/24184069
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