Struct JsStep 

pub struct JsStep { /* private fields */ }

A JavaScript transform step powered by QuickJS (via rquickjs).

The user provides a JS function body that receives a row object and returns a transformed object (or null/undefined to filter the record out).

{
  "type": "js",
  "function": "function transform(row) { return { ...row, total: row.price * row.qty } }"
}

The function is compiled once at parse time. Each apply() call serializes the row to JS, invokes the function, and deserializes the result back.

Implementations

impl JsStep

pub fn new(name: &str, function_source: &str) -> Result<Self, OversyncError>

Create a new JS transform from a function source string.

The source must define a global transform function that accepts one argument.

Trait Implementations

impl Debug for JsStep

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl TransformStep for JsStep

fn apply(&self, data: &mut Value) -> Result<bool, OversyncError>

fn step_name(&self) -> &str