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beforeDelete()

Registers method(s) that should be called before an object is deleted. This allows you to perform cleanup, enforce constraints, or prevent deletion if certain conditions are not met.

Name	Type	Required	Default	Description
methods	string	No		Method name or list of method names that should be called when this callback event occurs in an object's life cycle (can also be called with the `method` argument).

1. Basic usage: run a method before deleting
function config() {
    beforeDelete("fixObj");
}

function fixObj() {
    // Example: log deletions
    writeLog("Deleting record with ID #this.id#");
}

2. Prevent deletion if conditions fail
function config() {
    beforeDelete("checkIfAdmin");
}

function checkIfAdmin() {
    if (!session.isAdmin) {
        throw(type="SecurityException", message="Only admins can delete records.");
    }
}

3. Cascade cleanup before deletion
function config() {
    beforeDelete("cleanupAssociations");
}

function cleanupAssociations() {
    // Delete related comments before removing a post
    model("comment").deleteAll(where="postId = #this.id#");
}