Eloquent - Join a Subquery - laravel

Question

I have a complicated query that I would like to translate either in Eloquent ORM or with the Query Builder for a Laravel site, but I can't do it, can someone help me?
Here is my SQL query
SELECT opp_id, risk_study.rst_id, risk_study.rst_status
FROM opportunity
LEFT JOIN risk_study ON risk_study.rst_id =
(SELECT risk_study_quote_vehicle.rst_id
FROM risk_study_quote_vehicle
INNER JOIN quote_vehicle ON quote_vehicle.quv_id = risk_study_quote_vehicle.quv_id
INNER JOIN quote ON quote.quo_id = quote_vehicle.quo_id
WHERE quote.opp_id = opportunity.opp_id
ORDER BY risk_study_quote_vehicle.rst_id DESC
LIMIT 0,1)
WHERE 1 = 1
AND opportunity.per_id_process = '5'
AND opportunity.opp_locked = '1'
Here is my solution.
But this query does not retrieve values from the risk_study table.
$opportunities = Opportunity::select('opp_id', 'risk_study.rst_id', 'risk_study.rst_status')
->leftJoin('risk_study', function ($join) {
$join->on('risk_study.rst_id', '=', DB::raw('"SELECT risk_study_quote_vehicle.rst_id FROM risk_study_quote_vehicle INNER JOIN quote_vehicle ON quote_vehicle.quv_id = risk_study_quote_vehicle.quv_id INNER JOIN quote ON quote.quo_id = quote_vehicle.quo_id WHERE quote.opp_id = opportunity.opp_id ORDER BY risk_study_quote_vehicle.rst_id DESC LIMIT 0,1"'));
})
->where([
['per_id_process', 5],
['opp_locked', 1],
])
->get();

Answer 1

Finally, I wrote the query and it works ! Thanks !
$opportunities = Opportunity::query()
->select(
'opp_id',
'risk_study.rst_id',
'risk_study.rst_status'
)
->from('opportunity')
->leftJoin('risk_study', function ($join) {
$join->where('risk_study.rst_id', function ($sub) {
$sub->select('risk_study_quote_vehicle.rst_id')
->from('risk_study_quote_vehicle')
->join('quote_vehicle', 'quote_vehicle.quv_id', 'risk_study_quote_vehicle.quv_id')
->join('quote', 'quote.quo_id', 'quote_vehicle.quo_id')
->whereColumn('quote.opp_id', 'opportunity.opp_id')
->orderByDesc('risk_study_quote_vehicle.rst_id')
->limit(1);
});
})
->where('opportunity.per_id_process', '5')
->where('opportunity.opp_locked', '1')
->get();

Answer 2

You should be able to use a Closure as the second parameter of where() inside your join Closure.
I don't think Laravel's query builder supports the LIMIT 0,1 statement.
I don't know why you need WHERE 1 = 1, but you should be able to use whereRaw for that.
When you're done, the result looks very alike a formatted SQL query.
$opportunities = Opportunity::query()
->select(
'opp_id',
'risk_study.rst_id',
'risk_study.rst_status'
)
->from('opportunity')
->leftJoin('risk_study', function ($join) {
$join->where('risk_study_quote_vehicle.rst_id', function ($sub) {
$sub->select('risk_study_quote_vehicle.rst_id')
->from('risk_study_quote_vehicle')
->join('quote_vehicle', 'quote_vehicle.quv.id', 'risk_study_quote_vehicle.quv_id')
->join('quote', 'quote.quo_id', 'quote_vehicle.quo_id')
->where('quote_opp_id', 'opportunity.opp_id')
->orderByDesc('risk_study_quote_vehicle.rst_id')
->limit(1);
});
})
->whereRaw('1 = 1')
->where('opportunity.per_id_process', '5')
->where('opportunity.opp_locked', '1')
->get();