How to do in Laravel, subquery with calculated fields on SELECT? - mysql

Question

How can I make this query in Laravel eloquent. Please, no DB Record solution.
SELECT slo.batch,
slo.type,
(SELECT Count(sl1.id)
FROM sync_log sl1
WHERE sl1.status = 1
AND sl1.batch = slo.batch) AS success,
(SELECT Count(sl2.id)
FROM sync_log sl2
WHERE sl2.status = 0
AND sl2.batch = slo.batch) AS failed,
slo.created_at
FROM sync_log slo
GROUP BY batch
ORDER BY slo.created_at
Below is the database table.

Answer 1

Try something like :
$result=DB::table('sync_log as slo')
->select('slo.batch','slo.type', 'slo.created_at', DB::raw(('SELECT Count(sl1.id) FROM sync_log sl1 WHERE sl1.status=1 AND sl1.batch = slo.batch) AS success'), DB::raw(('SELECT Count(sl2.id) FROM sync_log sl2 WHERE sl2.status = 0 AND sl2.batch = slo.batch) AS failed')
->groupBy('batch')
->orderBy('slo.created_at')
->get();

Answer 2

Without any idea on your structure or models. guessing a manyToMany relation wetween batch and type where sync_log is the pivot table between them.
$batchs = Batch::withCount([
'types as success' => function ($query) {
$query->where('status', 1);
},
'types as failed' => function ($query) {
$query->where('status', 0);
}])
->get();

Answer 3

Using Eloquent ORM it can be tricky but I guess will work, you can define hasMany relation(s) in same model which will relate to same model using batch attribute/key like
class SyncLog extends Model
{
public function success_batches()
{
return $this->hasMany(SyncLog::class, 'batch', 'batch')->where('status',1);
}
public function failed_batches()
{
return $this->hasMany(SyncLog::class, 'batch', 'batch')->where('status',0);
}
}
Then using your model you can get count for these relations using withCount
$bacthes = SyncLog::withCount(['success_batches','failed_batches'])
->select(['batch','type'])
->distinct()
->orderBy('created_at')
->get();
If you don't want to define it twice based on where clause then you can follow the approach explained in #N69S's answer like
class SyncLog extends Model
{
public function batches()
{
return $this->hasMany(SyncLog::class, 'batch', 'batch');
}
}
$bacthes = SyncLog::withCount([
'batches as success' => function ($query) {
$query->where('status', 1);
},
'batches as failed' => function ($query) {
$query->where('status', 0);
}])
->select(['batch','type'])
->distinct()
->orderBy('created_at')
->get();