Features

• Support hidden items. Hidden items are used in training but not in recommendation (#178).
• Support item categories. Recommendations are generated for each category (#307).

Read 2.2 Item Management in the docment for detailed usage.

Performance

• Optimize deep copy by resuing memory (#315).

Upgrade Guide

Since new attributes IsHidden and Categories are added in v0.3.0. Using the follwing SQL to update the schema if using MySQL.

ALTER TABLE items ADD is_hidden BOOL NOT NULL DEFAULT FALSE;
ALTER TABLE items ADD categories json NOT NULL;