PATHMac OS 8 and 9 Developer Documentation > Interapplication Communication > AppleScript for Scripters >

AppleScript Language Guide

   

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SYNTAX

with transaction [ session ]
    [ statement ]...
end [ transaction ]

where

session is an object that specifies a specific session.

statement is any AppleScript statement.

EXAMPLES

This example uses a With Transaction statement to ensure that a record can be modified by one user without being modified by another user at the same time.

tell application "Small DB"
    with transaction
        set oldName to Field "Name"
        set oldAddress to Field "Address"
        set newName to display dialog ¬
            "Please type a new name" ¬
            default answer oldName
        set newAddress to display dialog ¬
            "Please type the new address" ¬
            default answer oldAddress
        set Field "Name" to newName
        set Field "Address" to newAddress
    end transaction
end tell

The Set statements obtain the current values of the Name and Address fields and invite the user to change them. Enclosing these Set statements in a single With Transaction statement informs the application that other users should not be allowed to access the same record at the same time.

With Transaction statements only work with applications that explicitly support them. Some applications only support With Transaction statements (like the one in the previous example) that do not take a session object as a parameter. Other applications support both With Transaction statements that have no parameter and With Transaction statements that take a session parameter.

The following example demonstrates how to specify a session for a With Transaction statement.

tell application "Super DB"
    set mySession to make session with ¬
        data {user: "Bob", password: "Secret"}
    with transaction mySession
        ...
    end transaction
end tell