Spring Data optional parameter in query method

Question

I want to write some query methods in repository layer. This method must ignore null parameters. For example:

List findByBarAndGoo(Bar barParam,          


        

Answer 1

Complementing the answer of @chaserb, I personally would add the parameter as a Java8 Optional type to make it explicit in the signature of the method the semantics that is an optional filter.

@Query("select foo from Foo foo where foo.bar = :bar and "
   + "(:goo is null or foo.goo = :goo)")
public List findByBarAndOptionalGoo(
     @Param("bar") Bar bar, 
     @Param("goo") Optional goo);