query scope with conditional constraint - laravel

Question

When building a query, if one of the constraints does not return result only then run another constraint
public function scopeLatestLocationSchedule($query, $location)
{
return $query
->where('location_id', $location)
->whereNull('service_id')
->whereNull('end_date') //If not found null end_date then return latest first end_date
}
How to write this query with a conditional check on the end_date constraint

Answer 1

Write below code in your model
use Illuminate\Database\Eloquent\Builder;
class YourModelName extends Model
{
public function scopeEndDateNullLocationSchedule(Builder $builder, $locationId)
{
return $builder->where('location_id', $locationId)
->whereNull('service_id')
->whereNull('end_date');
}
public function scopeEndDateNotNullLocationSchedule(Builder $builder, $locationId)
{
return $builder->where('location_id', $locationId)
->whereNull('service_id')
->whereNotNull('end_date');
}
Write this below code in your controller
$locationId = 1; // put your location id here;
$query = YourModelName::endDateNullLocationSchedule($locationId);
if (!count($query->get())) {
$query = YourModelName::endDateNotNullLocationSchedule($locationId);
}
$locationSchedule = $query->orderBy('end_date', 'DESC')->first();
dd($locationSchedule);

Answer 2

When I have many conditions, I find ver useful to use this snippet before the Controller declaration (just under "use...")
Builder::macro('if', function ($condition, $column, $operator, $value){
if ($condition) {
return $this->where($column, $operator, $value);
}
return $this;
});
Then you can build your queries adding this kind of conditions:
->if($request->service_id, 'id', '=', $request->service_id)
the line above will trigger only if there is a value for service_id, in that case the select query will search where the id is like $request->service_id.
Hope it helps!