How to write this complex query in Laravel - php

Question

This is my SQL query
select sum(stock.total_in_stock) as total_in_stock,stock.name,stock.inventory_id FROM ( SELECT i.store_id,i.model_id,i. total_in_stock,i.id as inventory_id, m.* from `inventory` as `i` left join `model_store` as `ms` on `ms`.`store_id` = `i`.`store_id` left join `model` as `m` on `m`.`id` = `ms`.`model_id` where `i`.`model_id` = m.id and `m`.`status` = 1 and `ms`.`status` = 1 and `i`.`created_at` = (select max(si.created_at) from `inventory` as `si` where si.model_id = i.model_id AND si.store_id = i.store_id AND si.status=1 ORDER BY si.created_at DESC LIMIT 1 )) as stock group by `stock`.`model_id`
Basically, I am trying to retrieve the stock of a particular store on the latest date.
I have written this query in laravel as follows:-
$results = DB::table('inventory as i')
->selectRaw( 'sum(stock.total_in_stock) as total_in_stock,stock.name,stock.inventory_id FROM ( SELECT i.store_id,i.model_id,i. total_in_stock,i.id as inventory_id, m.* ')
->leftJoin('model_store as ms','ms.store_id','=','i.store_id')
->leftJoin('model as m','m.id','=','ms.model_id')
->where('i.model_id','=', 'm.id')
->where('m.status','=', 1)
->where('ms.status','=', 1)
->where('i.created_at','=',function($query){
$query->from('inventory as si')
->selectRaw('max(si.created_at)')
->whereRaw('si.model_id = i.model_id AND si.store_id = i.store_id AND si.status=1 ORDER BY si.created_at DESC LIMIT 1 )) as stock ')
->groupBy('stock.model_id');
})->get();
This gives me the following error:-
SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1
(SQL: select sum(stock.total_in_stock) as total_in_stock,stock.name,stock.inventory_id FROM ( SELECT i.store_id,i.model_id,i. total_in_stock,i.id as inventory_id, m.* from `inventory` as `i` left join `model_store` as `ms` on `ms`.`store_id` = `i`.`store_id` left join `model` as `m` on `m`.`id` = `ms`.`model_id` where `i`.`model_id` = m.id and `m`.`status` = 1 and `ms`.`status` = 1 and `i`.`created_at` = (select max(si.created_at) from `inventory` as `si` where si.model_id = i.model_id AND si.store_id = i.store_id AND si.status=1 ORDER BY si.created_at DESC LIMIT 1 )) as stock group by `stock`.`model_id`))
I need to apply pagination. So i have to write this query as above.
I tried writing the query using DB::select(). It returns correct records but unfortunately, I cannot use pagination with that.
Please help me writing the correct query in laravel.

Answer 1

Try getting the PDO instance to execute your query directly, something like this:
$PDO=DB::connection('mysql')->getPdo();
$stmt=$PDO->prepare("
select
sum(stock.total_in_stock) as total_in_stock,
stock.name,
stock.inventory_id
FROM
(SELECT
i.store_id,
i.model_id,
i.total_in_stock,
i.id as inventory_id,
m . *
from
`inventory` as `i`
left join `model_store` as `ms` ON `ms`.`store_id` = `i`.`store_id`
left join `model` as `m` ON `m`.`id` = `ms`.`model_id`
where
`i`.`model_id` = m.id
and `m`.`status` = 1
and `ms`.`status` = 1
and `i`.`created_at` = (select
max(si.created_at)
from
`inventory` as `si`
where
si.model_id = i.model_id
AND si.store_id = i.store_id
AND si.status = 1
ORDER BY si.created_at DESC
LIMIT 1)) as stock
group by `stock`.`model_id`
");
// you can use prepared statments too,
// you will need to place :status
// accordingly in your query
//$stmt->bindParam(':status', 1);
$stmt->execute();
$result = $stmt->fetchAll();
Good Luck!