After a year and a half of development, Gorse v0.5 is released. This release includes breaking changes, so it is worth writing an article to introduce the new features and upgrade guide.

New Features

New Data Schema

1. The Subscribe field of User has been removed. In the early design, the Subscribe field was used to store tags subscribed by users, but it was not actually used. It is recommended to use External Recommenders to implement business logic driven recommendations like subscriptions.

2. The Labels field of User and Item supports arbitrary JSON objects. On this basis, some recommenders can specify nested fields to use. For example, in item-to-item recommenders, you can specify using the Labels.embedding embedding vector to calculate item similarity.

3. The Value field has been added to feedback. The Value field is used to represent the weight of feedback, such as the percentage of video watching, the rating of goods, etc. On the one hand, positive and negative feedback can be distinguished by setting thresholds based on the Value field; on the other hand, future updates will utlize the Value field to better train models. When inserting feedback, you can choose to accumulate (POST) the Value, or overwrite (PUT) the original Value.