Re: [PHP] Problem extending mysqli - "No database connected"

Somewhere in that mess there should be something to do a
mysqli_select_db() to choose WHICH database to use...

Where it's supposed to be in the mess of OOP layers you're wrapped
around yourself, god only knows.

On Fri, June 29, 2007 12:31 pm, Lee PHP wrote:
Hi,

I have a class that extends msyqli that AFAIK can connect to the
database, but gives me an error when I try and query it. Here's my
class:

-- BEGIN DATABASE CLASS --
require_once('Configuration.php');
require_once('RSFSException.php');

class Database extends mysqli {

private $strUrl = "DEV";
private $strUser;
private $strPass;
private $strHost;
private $intPort;
private $strName;

private static $INSTANCE;
private static $CONFIG;

private function __construct() {
$this->CONFIG = Configuration::getInstance();
$this->establishConnectionSettings();
$this->connect($this->getHost(), $this->getUser(),
$this->getPass(), $this->getName);

if (mysqli_connect_errno()) {
throw new RSFSException("Connect exception:\n ".
mysqli_connect_error(), -1);
}
}

public static function getInstance($url = null) {
// Set the URL if one is provided.
if (isset($url)) {
$this->setUrl($url);
}

// Instantiate the Singleton if not already instantiated.
if(empty(self::$INSTANCE)) {
self::$INSTANCE = new Database();
}

return self::$INSTANCE;
}

public function establishConnectionSettings() {
// DEVELOPMENT (default) database settings.
if ($this->getUrl() == "DEV") {
$this->setUser($this->CONFIG->getProperty("rsfsTestDbUser"));
$this->setPass($this->CONFIG->getProperty("rsfsTestDbPass"));
$this->setHost($this->CONFIG->getProperty("rsfsTestDbHost"));
$this->setPort($this->CONFIG->getProperty("rsfsTestDbPort"));
$this->setName($this->CONFIG->getProperty("rsfsTestDbName"));
}

// PRODUCTION database settings.
else if ($this->getUrl() == "PROD") {
$this->setUser($this->CONFIG->getProperty("rsfsDbUser"));
$this->setPass($this->CONFIG->getProperty("rsfsDbPass"));
$this->setHost($this->CONFIG->getProperty("rsfsDbHost"));
$this->setPort($this->CONFIG->getProperty("rsfsDbPort"));
$this->setName($this->CONFIG->getProperty("rsfsDbName"));
}

else {
// Throw an exception.
}
}

public function query($sql) {
$result = parent::query($sql);

if(mysqli_error($this)){
throw new RSFSException(mysqli_error($this),
mysqli_errno($this));
}

return $result;
}

public function valueExists($table, $column, $value,
$caseInsensitive = false) {
if (!$caseInsensitive) {
$sql = "SELECT * FROM $table WHERE $column = $value";
}

else {
$sql = "SELECT * FROM $table " .
"WHERE upper($column) = ($value)";
}

$result = $this->query($sql);
echo "Result: $result\n";
$count = $result->num_rows;

if ($count > 0) {
return true;
}

else {
return false;
}
}

public function valuesExist($table, $columns, $values) {
// Placeholder.
}

public function procedureQuery($name, $params) {
return $this->query("call $name($params)");
}

/** Return the URL. */
public function getUrl() {
return $this->strUrl;
}

.
.
.

/** Set the database URL. */
public function setName($url) {
$this->strUrl = $$url;
}
}

-- END DATABASE CLASS --

To test it, I'm doing the following:

-- BEGIN --
echo "Attempting to establish connection.\n";
$CONN = Database::getInstance();

if ($CONN->ping()) {
printf ("Our connection is ok!\n");
} else {
printf ("Danger, Will Robinson!!!\n");
}

echo "Attempting to test query() method.\n";
if ($result = $CONN->query("SELECT * FROM country")) {
echo "In result set\n";
while( $row = mysqli_fetch_assoc($result) ){
printf("%s (%s)\n", $row['cnt_code'], $row['cnt_name']);
}
}
-- END --

Which outputs the following:

Attempting to establish connection.
localhost:rsfs:rsfs:rsfs
Our connection is ok!
Attempting to test query() method.


Fatal error: Uncaught RSFSException: [1046]: No database selected

thrown in /home/lee/Development/rsfs/php/classes/core/Database.php
on line 84

I've tried removing the query method from my class, but even Mysqli's
query() isn't working. Can anyone help me identify the problem?

Thanks!
Lee

PS: I posted a similar question a few weeks ago - I though I had it
working when I saw that it was connecting. Now that I'm ready to
actually use it, I see that it just can't query...

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