I need help to turn some raw SQL into Eloquent code - php

Question

As the title says, I'm having trouble turning my SQL code into Eloquent.
Here's the raw SQL:
select * from `students`
where (
select status_student.id from `status_student`
WHERE
status_student.id = (SELECT MAX(status_student.id) from `status_student`
WHERE
status_student.student_id = students.id)
AND
status_student.status_id = 6
)
IS NOT NULL;
and here's the code so far:
$status = $this->request->get('status');
if ($status !== "0") {
dd($query = Student::where(function($q) use($status){
$q->where('status_student.id', function($q2) use ($status) {
$q2->selectRaw('MAX(status_student.id)')
->where('status_student.student_id', '=', 'students.id')
->where('status_student.status_id', '=', $status);
});
})->toSql());
}
which translates into SQL:
"select * from `students` where (`status_student`.`id` = (select MAX(status_student.id) where `status_student`.`student_id` = ? and `status_student`.`status_id` = ?))
so it's not working properly yet.
I'm having trouble introducing that IS NOT NULL clause and doing
select status_student.id from 'status_student'
instead of just
status_student.id =
How should I modify my code to get the desired SQL?
Thanks.

Answer 1

$status = request()->get('status');
if ($status !== "0") {
dd($query = Student::where(function($q) use($status){
$q->where([['status_student.id' => function($q2) use ($status) {
$q2->selectRaw('MAX(status_student.id)')
->where('status_student.student_id', '=', 'students.id')
->where('status_student.status_id', '=', $status);
}],
['status_student.id', '<>', null]
]);
})->toSql());
}
Generated SQL query:
SELECT *
FROM `students`
WHERE (((`status_student`.`student_id` = ?
AND `status_student`.`status_id` IS NULL)
AND `status_student`.`id` IS NOT NULL))
Not sure if I understanded you correctly but I assume you just didn't get the syntax right

Answer 2

try this one:
$status = $this->request->get('status');
if ($status !== "0") {
// log the queries:
\DB::enableQueryLog();
$query = Student::with([
'statusStudent' => function($q1) use($status) {
$q1->where('status_student.id', function($q2) use ($status) {
$q2->selectRaw('MAX(status_student.id)')
->where('status_student.student_id', '=', 'students.id')
->where('status_student.status_id', '=', $status);
});
}
])
->get();
$pureQuery = \DB::getQueryLog();
dd($pureQuery);
}
If you would like to join in eloquent, you must use with() or load() to do that.