53 lines
1.6 KiB
Plaintext
53 lines
1.6 KiB
Plaintext
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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