spring - how to fix the CrudRepository.save(java.lang.Object) is no accessor method in springboot? -

im reffering springboot tutorial , im using spring data in project, im trying add data database . using following . bt when im trying error saying

invoked method public abstract java.lang.object org.springframework.data.repository.crudrepository.save(java.lang.object) no accessor method!

here code ,

//my controller  @requestmapping("/mode")     public string showproducts(moderepository repository){         mode m = new mode();         m.setseats(2);         repository.save(m); //this error getting         return "product";     }   //implementing crud mode repository @repository public interface moderepository extends crudrepository<mode, long> {  }   //my mode class @entity @table(name="mode") public class mode implements serializable {     private static final long serialversionuid = 1l;      @id     @generatedvalue(strategy=generationtype.auto)     @column(unique=true, nullable=false)     private int idmode;        @column(nullable=false)     private int seats;      //assume there getters , setters } 

im new springboot , can tellme doing wrong, appreciate if provide me link know springdata other spring documentation

change controller code moderepository private autowired field.

    @autowired //don't forget setter     private moderepository repository;       @requestmapping("/mode")     public string showproducts(){         mode m = new mode();         m.setseats(2);         repository.save(m); //this error getting         return "product";     }