Feature

• Support modify users and items by PATCH method (8a6de0e2abb7957f2ece691b467fe2bb3e6aa737).
• Support enable or disable click-through prediction model in configuration (2e4260cfc73d5e37bfb01c3577e699a9d798c4bd).
• Support explore latest items and popular items in personalized recommendation (2e4260cfc73d5e37bfb01c3577e699a9d798c4bd).

Fix

• Fix incompatibility of MariaDB (#294).
• Fix "Invalid Date" in dashboard (8c33b7d47c84052ec94aad31c0cbb1df47a5c85a).
• Fix auto_insert_item = false not working (#301).
• Skip empty feedback list when inserting feedback (#300).

Upgrade Guide

• In configuration file：
  • enable_click_through_prediction enable/disable click-through prediction.
  • explore_recommend defines the proportion of latest/popular items in offline recommendation.
• In RESTful API, PATCH methods are implemented for users and items.
• If there are feedback come from nonextsted items casued by #299, remember to delete them in database. Eg., delete them in MySQL:

delete from feedback where item_id not in (select item_id from items)