ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Working with local SQL databases in AIR
Executing an operation that depends on another operation
Adobe AIR 1.0 and later
When you’re using synchronous execution mode, you don’t need to write code that listens for an event to determine
when an operation completes. Instead, you can assume that if an operation in one line of code completes successfully,
execution continues with the next line of code. Consequently, to perform an operation that depends on the success of
another operation, simply write the dependent code immediately following the operation on which it depends. For
instance, to code an application to begin a transaction, execute an INSERT statement, retrieve the primary key of the
inserted row, insert that primary key into another row of a different table, and finally commit the transaction, the code
can all be written as a series of statements. The following example demonstrates these operations:
var conn:SQLConnection = new SQLConnection();
// The database file is in the application storage directory
var folder:File = File.applicationStorageDirectory;
var dbFile:File = folder.resolvePath("DBSample.db");
// open the database
conn.open(dbFile, SQLMode.UPDATE);
// start a transaction
conn.begin();
// add the customer record to the database
var insertCustomer:SQLStatement = new SQLStatement();
insertCustomer.sqlConnection = conn;
insertCustomer.text =
"INSERT INTO customers (firstName, lastName) " +
"VALUES ('Bob', 'Jones')";
insertCustomer.execute();
var customerId:Number = insertCustomer.getResult().lastInsertRowID;
// add a related phone number record for the customer
var insertPhoneNumber:SQLStatement = new SQLStatement();
insertPhoneNumber.sqlConnection = conn;
insertPhoneNumber.text =
"INSERT INTO customerPhoneNumbers (customerId, number) " +
"VALUES (:customerId, '800-555-1234')";
insertPhoneNumber.parameters[":customerId"] = customerId;
insertPhoneNumber.execute();
// commit the transaction
conn.commit();
Last updated 6/6/2012
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