我正在计算老师和学校的距离。
我正在查询用户表，然后使用whereHas（）查询userable_type教师。教师表具有经度和纬度值。
当我直接查询教师模型而不是首先查询用户模型时，以下内容对我有用了！
$query = User::where('userable_type', 'App\Teacher');
$query->with('userable');
if($school->latitude == '' || $school->longitude == '') {
\Session::flash('warning', 'Please check your school profile postcode; it appears that the system was unable to geocode your postcode! Results shown do not reflect any distances of staff from your school!');
} else {
$query->whereHas('teacher', function ($query) use ($school) {
$haversine = "(3961 * acos(cos(radians($school->latitude))
* cos(radians(latitude))
* cos(radians(longitude)
- radians($school->longitude))
+ sin(radians($school->latitude))
* sin(radians(latitude))))";
$query->select() //pick the columns you want here.
->selectRaw("{$haversine} AS distance")
->whereRaw("{$haversine} < ?", '20');
// ->havingRaw('{$haversine}', '<', '20');
});
}
$query->whereDoesntHave('thisSchool');
$teachers = $query->get();
未创建“距离”字段但不会引发任何错误！所以我的问题是，在这种情况下，如何按照我想要的距离为每个用户添加“距离”值？
这是直接查询教师模型的查询，它可以正常工作！
$query = Teacher::with('user', 'user.schools', 'criterias', 'criterias.stafftype', 'criterias.teachingstage', 'criterias.teachingsubject')
->where('public', 1)
->where('verified', 1);
if($school->latitude == '' || $school->longitude == '') {
\Session::flash('warning', 'Please check your school profile postcode; it appears that the system was unable to geocode your postcode! Results shown do not reflect any distances of staff from your school!');
} else {
if( $filters['distance'] != '' ) {
$haversine = "(3961 * acos(cos(radians($school->latitude))
* cos(radians(latitude))
* cos(radians(longitude)
- radians($school->longitude))
+ sin(radians($school->latitude))
* sin(radians(latitude))))";
$query->select() //pick the columns you want here.
->selectRaw("{$haversine} AS distance")
->whereRaw("{$haversine} < ?", [$filters['distance']]);
}
}
$query->orderBy( 'active', 'DESC' );
$query->orderBy( 'distance', 'ASC' );
$teachers = $query->paginate( $filters['perpage'] );
谢谢， ķ...