53 lines
1.6 KiB
Plaintext
53 lines
1.6 KiB
Plaintext
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From the start Doctrine has been designed to work with multiple connections. Unless separately specified Doctrine always uses the current connection for executing the queries. The following example uses {{openConnection()}} second argument as an optional connection alias.
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<code type="php">
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// Doctrine_Manager controls all the connections
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$manager = Doctrine_Manager::getInstance();
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// open first connection
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$conn = $manager->openConnection(new PDO('dsn','username','password'), 'connection 1');
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</code>
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For convenience {{Doctrine_Manager}} provides static method {{connection()}} which opens new connection when arguments are given to it and returns the current connection when no arguments have been speficied.
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<code type="php">
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// open first connection
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$conn = Doctrine_Manager::connection(new PDO('dsn','username','password'), 'connection 1');
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$conn2 = Doctrine_Manager::connection();
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// $conn2 == $conn
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</code>
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The current connection is the lastly opened connection.
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<code type="php">
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// open second connection
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$conn2 = $manager->openConnection(new PDO('dsn2','username2','password2'), 'connection 2');
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$manager->getCurrentConnection(); // $conn2
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</code>
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You can change the current connection by calling {{setCurrentConnection()}}.
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<code type="php">
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$manager->setCurrentConnection('connection 1');
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$manager->getCurrentConnection(); // $conn
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</code>
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You can iterate over the opened connection by simple passing the manager object to foreach clause. This is possible since {{Doctrine_Manager}} implements special {{IteratorAggregate}} interface.
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<code type="php">
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// iterating through connections
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foreach($manager as $conn) {
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}
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</code>
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