Laravel how to get query with bindings?

Question

I have some query that I need to pass to another query using query builder

$query = DB::table(\'table\')->whereIn(\'some_field\', [1,2,30])->toSql();

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Answer 1

This is a very old question (2015), but since this is the first Google result I got I think it's worth to give my solution as well, in case it's useful for the next person.

Eloquent (5.7 onwards I think, I haven't tested more recent or earlier versions) has a method to change a Builder's from to wrap a subquery:

# Taken from Illuminate/Database/Query/Builder.php - Line 272
public function fromSub($query, $as) {
    [$query, $bindings] = $this->createSub($query);

    return $this->fromRaw('('.$query.') as '.$this->grammar->wrapTable($as), $bindings);
}

This however requires an already existing instance of \Illuminate\Database\Query\Builder. In order to make an empty one, you can do:

use Illuminate\Database\Capsule\Manager as DB;

$fancy = DB::table("videogames")->where("uses_sdl2", 1);
$empty = DB::table(null);

# Wrap the fancy query and set it as the "from" clause for the empty one
# NOTE: the alias is required
$empty = $empty->fromSub($fancy, "performant_games");

This will warranty that bindings are treated correctly, since they'll be handled by Eloquent itself.