Laravel Multiple Unions

Question

I\'m having an issue adding a query with multiple Unions the \"laravel way\".

The I am trying to accomplish a query equivalent to the one generated by the following:

Answer 1

Your unionAll calls are indeed getting nested. One solution is to create a subquery in the for loop, and then unionAll that subquery to the main query after it's been defined. Then you run get on the whole shebang when you're done, like so:

$ips_list = DB::table('ips')->where('network', '=', '1')->where('used', '=', '0')->limit(5);

for($n = 1; $n < $total_networks; $n++){
    $ip_list_subquery = DB::table('ips')
             ->where('network', '=', $n)
             ->where('used', '=', '0')
             ->limit(5);
    $ips_list = $ips_list->unionAll($ip_list_subquery);
}
$ips = $ips_list->get();

So, effectively, you're chaining the unionAll calls:

$a->unionAll($b)->unionAll($c)->unionAll($d)...

rather than nesting them:

$a->unionAll($b->unionAll($c->unionAll($d...))))