With eloquent to make search by 2 fields - mysql

Question

Is there a way in Laravel 5.6/MySQL 5.7 with eloquent to make search with condition:
need to check if sale_price is set then search in sale_price else in retail_price
Have I use condition like :
\DB::raw( ‘ isNull( sale_price, retail_price ) > 10’ )
and how to modify the search above if both sale_price and retail_price are null?
Or there is better solution ?
MODIFIED :
I implemented it as scope :
public function scopeGetByDoublePrice($query, $price_from= null, $price_to= null)
{
// need to check if sale_price is set then search in sale_price else in retail_price
if ( empty($price_from) and empty($price_to) ) return $query;
if ( !empty($price_from) ) { // $price_from is set
$query->whereNotNull('sale_price')->where('sale_price', '>=', $price_from);
$query->orWhere('retail_price', '>=', $price_from);
} // if (!empty($price_from) ) { // $price_from is set
if ( !empty($price_to) ) { // $price_to is set
$query->whereNotNull('sale_price')->where('sale_price', '<=', $price_to);
$query->orWhere('retail_price', '<=', $price_to);
} // if (!empty($price_to) ) { // $price_to is set
return $query;
}
but setting 2 values 31 and 33 I have different result I expected :
https://imgur.com/a/AYTJAJn
I expected only the first row would be in results set!
In sql-editor I set "()" manually, as :
SELECT sale_price, retail_price
FROM articles
LEFT JOIN brands AS b on b.id = articles.brand_id
LEFT JOIN article_inventories AS ai on ai.article_id = articles.id
WHERE ( ( sale_price is not null AND sale_price >= '31' OR retail_price >= '31' ) AND
( sale_price is not null AND sale_price <= '33' OR retail_price <= '33') )
and it works as I need. If there is a way to set "()" in my scope?

Answer 1

Use to following constraint:
$price = 10;
$builder->where(function($query) use ($price) {
$query->whereNotNull('sale_price')->where('sale_price', '>', $price);
$query->orWhere('retail_price', '>', $price);
});
This will add the following to your query:
AND (sale_price IS NOT NULL and sale_price > 10 OR retail_price > 10)
What's important, you'll find those extra constraints wrapped in parenthesis which will let you avoid the situation, when other constraints are ignored because of the OR.