How to add and delete from a set type?

[meightythree]

import { Entity, Service } from 'electrodb';

export const ConnectionEntity = new Entity(
    {
        model: {
            entity: 'connections',
            version: '1',
            service: 'myApp',
        },
        attributes: {
            userId: {
                type: 'string',
                required: true,
                readOnly: true,
            },
            connectionIds: {
                type: 'set',
                items: 'string',
                default: () => [],
                required: true,
            },
        },
        indexes: {
            session: {
                pk: {
                    field: 'userId',
                    composite: ['userId'],
                },
            },
        },
    },
    {
        table: 'connections',
    },
);

Is it possible to directly add/delete from the connectionIds set without getting the entity?

[raryanpur]

Sure, you should be able to use the add and delete operations on the patch and update mutations (docs here and here). These resolve to using the UPDATE expression in Dynamo under the hood, so don't require you to read-modify-write in client code or use read capacity units.

For example,

await ConnectionEntity.patch({userId}).delete({connectionIds: [<ids_to_remove>]})