Normally, I write a "Lessons Learned" article each month. The last one was published in December 2017, which shows how busy I've been in the past months. To catch up, this article will contain detailed lessons learned for January 2018. Later in the text, there will be more general lessons about those busy past months.

This is what I learned in January 2018:

This is what I learned in December 2017:

This is what I learned in November 2017:

This is what I learned in October 2017:

1. Until now, I used query methods in Spring Data JPA only for reading. However, also updates can be written in repositories:

This is what I learned in September 2017:

This is what I learned in July 2017:

This is what I learned in June 2017:

This is what I learned in May 2017:

This is what I learned in April 2017:

This is what I learned in March 2017: