public function getDownvotes($id)
{
$proposition = Proposition::find($id);
$downvotes = 0;
$downvotes = Votes::wherePropositionIdAndVoteValue($proposition->propositionId(), 0)->get();
$downvotesSum = 0;
foreach ($downvotes as $downvote) {
$downvotesSum++;
}
return $downvotesSum;
}
