MyBatis: How to return the ID of the inserted object under Postgres?

问题

I've got a postgres table where the ID is defined as bigserial. How can I use @Insert and get back the id of the inserted entity? I am expecting the mapper method to either return the id or populate the id field inside the entity object. Any ideas?

回答1:

NVM, i think i found the answer on the other thread, http://mybatis-user.963551.n3.nabble.com/How-to-return-the-ID-of-the-inserted-object-under-Postgres-td1926959.html

There's the link for anyone else who lands here.

回答2:

The mapper will return you the number of records that were actually inserted. In order to get back the id of the inserted record, you'll need to add a second annotation (that will populate the id) :

@Options(useGeneratedKeys=true, keyProperty="idSomething")

Note that keyProperty is not necessary if the identifiyng property is named "id" in your entity object.

来源：https://stackoverflow.com/questions/4260428/mybatis-how-to-return-the-id-of-the-inserted-object-under-postgres