Defining aggregates

To define an aggregate, create a .js file with the name of the aggregate within the appropriate context directory:

$ cd <app>
$ touch server/writeModel/<context>/<aggregate>.js

Shared code

The server/writeModel directory must only contain contexts and aggregates. If you want to add a directory or a file that is shared across multiple aggregates, put it into the server/shared folder.

E.g., if you want to define an aggregate called invoice in the accounting context, use the following directory structure:

<app>
  server
    flows
    readModel
    shared
    writeModel
      accounting
        invoice.js

Structuring the code

Every aggregate uses the same base structure. Hence, you can prepare an aggregate by simply copying and pasting the following template:

'use strict';

const initialState = {
  isAuthorized: {
    commands: {},
    events: {}
  }
};

const commands = {};

const events = {};

module.exports = { initialState, commands, events };

# Defining aggregates

# Structuring the code

Defining aggregates

Structuring the code