API Reference

cqrsProjection()

Derive a projection from declared CQRS event deps. Reducer failures become graph-visible error DATA facts on the returned errors node.

Import

import { cqrsProjection } from "@graphrefly/ts/cqrs";

Signature

function cqrsProjection(
	graph: Graph,
	source: Pick<CqrsBundle<unknown, TEvent>, "events">,
	opts: CqrsProjectionOptions<TState, TEvent>,
): CqrsProjection<TState>

Parameters

Parameter	Type	Description
`graph`	`Graph`	Graph that owns the created nodes or projector.
`source`	`Pick<CqrsBundle<unknown, TEvent>, "events">`	Source node that provides graph-visible input.
`opts`	`CqrsProjectionOptions<TState, TEvent>`	Options that configure the helper.

Returns

A CqrsProjection<TState> value.

Example

import { cqrsProjection } from "@graphrefly/ts/cqrs";

Source

packages/ts/src/cqrs/index.ts