SQLite数据库连接正在更改内存但不保存到文件 - AS3 AIR

Question

I'm trying to write to a local SQLite database using the flash.data.* classes in AIR. I'm opening a synchronous connection in CREATE mode and using the begin() and commit() methods to execute the queries. Everything seems to be executing as expected. The query execute() and connection commit() method's success handler is being called, the connection object's totalChanges property is being incremented, everything looks good except the database file is not being written to . Any ideas what I could be doing wrong?

I don't think it's related to...

• the query itself since that was throwing errors whenever something didn't match up.
• the file mode for the same reason.
• file permissions - currently set to 777

Simplified version of the code:

var database:File = new File(File.applicationDirectory.nativePath + "//" + PATH_TO_DB );
var connection:SQLConnection = new SQLConnection();
connection.open( database, SQLMode.CREATE );
connection.begin();

var statement:SQLStatement = new SQLStatement();
statement.sqlConnection = connection;
statement.addEventListener(SQLEvent.RESULT, onQueryResult);
statement.addEventListener(SQLErrorEvent.ERROR, onQueryError);

statement.text = "INSERT INTO myCrazyTable (foo) VALUES ('bar')";
statement.execute();
connection.commit(new Responder(onCommitComplete));

function onQueryResult(event:SQLEvent):void {
    trace("Query successful"); // this is getting called
}

function onQueryError(event:SQLErrorEvent):void {
    trace("Error in query: " + event.error.message);
}   

function onCommitComplete(event:SQLEvent):void {
    trace("Commit Success"); // this is getting called
    connection.close();
}

// Database isn't getting touched.

Answer 1

Did you check options defined by pragma? For example http://www.sqlite.org/pragma.html#pragma_synchronous can cause this behavior.

Answer 2

The first thing I would ask is, how do you know it isn't being touched? Timestamp? Or are you querying for the item and not finding it?

The main reason I ask is, I'm suspicious of this code:

var database:File = new File(File.applicationDirectory.nativePath + "//" + PATH_TO_DB );

I think the // is incorrect, and I think possibly your DB is ending up somewhere other than where you think it is, most likely at the root filesystem. If my theory is correct, you are writing data to a different db than you think you are, not just "in memory".

Answer 3

I fixed the issue. I ended up rewriting the code for accessing the database. I'm not sure exactly where the problem was, something I must have been overlooking. Thanks for everyone's help.