On behalf of the team, I’m pleased to announce the availability of the Spring Data 2021.1.0-M1 milestone release.

The release is built on top of Spring Framework 5.3.9. For your convenience, you can consume this release through Spring Boot 2.6.0-M1, which our team mates on the Boot team will release in about a week.

The 2021.1 release train ships a set of features and dependency upgrades. The most important changes are:

• Upgrade to Querydsl 5.
• Support for a wide range of Redis 6.2 commands.
• Support for dialect-dependent custom conversions in Spring Data JDBC. This was used to improve the support of java.time types across multiple databases.
• Support for streaming large result sets in Spring Data JDBC.
• Support for AggregateReference in query derivation.
• REF_CURSOR support for stored procedures in Spring Data JPA.
• Upgrade to MongoDB Driver 4.3 and initial support for MongoDB Server 5.0 Time Series.
• Spring Data MongoDB comes with extended capabilities for linking documents and offers, next to the existing DBRef approach, a property-based solution that uses simple values, such as the target _id or a combination of fields to link to another document.

The sample below shows the reference to a collection of Account documents through their _id in Java code and how it is represented in MongoDB: java @Document class Person { @Id String id; @DocumentReference List<Account> accounts; } json { "_id" : …, "accounts" : [ "6509b9e" … ] }

See the wiki page of the Spring Data 2021.1 release train for further details. We're working towards a second milestone in August and a third one in September. We plan for a GA release in November. We're looking forward to your feedback!

To round things off, here are the links to the artifacts, changelogs, and documentation:

2021.1.0-M1

• Spring Data Commons 2.6 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data JDBC 2.3 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data JPA 2.6 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data KeyValue 2.6 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data for Apache Cassandra 3.3 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data Neo4j 6.2 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data MongoDB 3.3 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data for Apache Geode 2.6 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data R2DBC 1.4 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data LDAP 2.6 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data Envers 2.6 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data REST 3.6 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data Redis 2.6 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data Elasticsearch 4.3 M1 - Artifacts - Javadoc - Documentation - Changelog
• Spring Data Couchbase 4.3 M1 - Artifacts - Javadoc - Documentation - Changelog