Query return empty result but data exist - mysql

Question

I'm using Slim with PDO with MySql for return a specific list of matches available in my database. My query is this:
SELECT m.*,
t.name AS home_team_name,
t2.name AS away_team_name
FROM `match` m
LEFT JOIN team t ON m.home_team_id = t.id
LEFT JOIN team t2 ON m.away_team_id = t2.id
WHERE (home_team_id = 117 OR away_team_id = 117) AND round_id = 488
if I execute this query I'll get a list of matches:
but inside the API developed with Slim I get an empty array. This is the method structure:
$app->get('/match/get_matches_by_team/{round_id}/{team_id}/{type}', function (Request $request, Response $response, array $args)
{
$query = "SELECT m.*,
t.name AS home_team_name,
t2.name AS away_team_name
FROM `match` m
LEFT JOIN team t ON m.home_team_id = t.id
LEFT JOIN team t2 ON m.away_team_id = t2.id
WHERE ";
switch($args["type"])
{
case "home":
$query .= "home_team_id = :team_id AND ";
break;
case "away":
$query .= "away_team_id = :team_id AND ";
break;
default:
$query .= "(home_team_id = :team_id OR away_team_id = :team_id) AND ";
break;
}
$query .= "round_id = :round_id";
$sql = $this->db->prepare($query);
$sql->bindParam("team_id", $args["team_id"]);
$sql->bindParam("round_id", $args["round_id"]);
$sql->execute();
$result = $sql->fetchAll();
return $response->withJson($result);
});
what I did wrong?
Thanks in advance for any help.
UPDATE
If I do echo $query; return; I'll get:
SELECT m.*,
t.name AS home_team_name,
t2.name AS away_team_name
FROM `match` m
LEFT JOIN team t ON m.home_team_id = t.id
LEFT JOIN team t2 ON m.away_team_id = t2.id
WHERE away_team_id = :team_id AND round_id = :round_id
supposing to pass away, if instead I pass all I'll get:
SELECT m.*,
t.name AS home_team_name,
t2.name AS away_team_name
FROM `match` m
LEFT JOIN team t ON m.home_team_id = t.id
LEFT JOIN team t2 ON m.away_team_id = t2.id
WHERE (home_team_id = :team_id OR away_team_id = :team_id) AND round_id = :round_id
UPDATE 2
Method updated with proposed hints
$app->get('/match/get_matches_by_team
/{round_id}/{team_id}/{type}', function (Request $request, Response $response, array $args)
{
$query = "SELECT m.*,
t.name AS home_team_name,
t2.name AS away_team_name
FROM `match` m
LEFT JOIN team t ON m.home_team_id = t.id
LEFT JOIN team t2 ON m.away_team_id = t2.id
WHERE ";
switch($args["type"])
{
case "home":
$query .= "home_team_id = :home_team_id
AND ";
break;
case "away":
$query .= "away_team_id = :away_team_id AND ";
break;
default:
$query .= "(home_team_id = :home_team_id OR away_team_id = :away_team_id) AND ";
break;
}
$query .= "round_id = :round_id";
$sql = $this->db->prepare($query);
$sql->bindParam("home_team_id", $args["team_id"]);
$sql->bindParam("away_team_id", $args["team_id"]);
$sql->bindParam("round_id", $args["round_id"]);
$sql->execute();
$result = $sql->fetchAll();
return $response->withJson($result);
});

Answer 1

yours:
$sql->bindParam("team_id", $args["team_id"]);
$sql->bindParam("round_id", $args["round_id"]);
try this, the params might be needed to be formatted differently
$sql->bindParam(":team_id", $args["team_id"], PDO::PARAM_INT);
$sql->bindParam(":round_id", $args["round_id"], PDO::PARAM_INT);
or
$sql->bindParam(":team_id", $args["team_id"]);
$sql->bindParam(":round_id", $args["round_id"]);

Answer 2

When the default switch is selected, you are trying to bind a value with the same parameter marker (in your case :team_id) twice. In order for this to work you have to turn on emulation mode in PDO.
http://www.php.net/manual/en/pdo.prepare.php
You must include a unique parameter marker for each value you wish to pass in to the statement when you call PDOStatement::execute(). You cannot use a named parameter marker of the same name more than once in a prepared statement, unless emulation mode is on.