如何捕获fetchAll（PDO :: FETCH_OBJ）

Question

In my Symfony 1.4 project in one of my class.php file I used the following codes to execute query and fetch object.

$statement = Doctrine_Manager::connection()->execute($query);
$resultset = $statement->fetchAll(PDO::FETCH_OBJ);

I tried to use try-catch block to catch any run-time exceptions. I can easily do that for the first line like

    try {
        $statement = Doctrine_Manager::connection()->execute($query);
    } 
    catch (Exception $exc) {
        echo "custom error message";
    }

But, I this dosen't work for the second line. It always show the following error when I run the page

Fatal error: Call to a member function fetchAll() on a non-object in

\lib\model\doctrine\DeductionInfo.class.php on line 104

How can I resolve this?

Answer 1

Of course it seems to be an invalid query or something like that, resulting in a non-object in your var $statement. Debug or var_dump your $statement var at first.

Doctrine btw is on top of PDO. By default a PDO construct throws an exception on error. But you have to set error handling for quering to exception (http://php.net/manual/en/pdo.error-handling.php) if you want to use try-catch statements. I don't know exactly the way Doctrine 1 handles this.