Can't save "Many"-Entity of @OneToMany with Spring-Boot & Spring-JPA -

i'm using spring boot , mysql. followed this link setting , i'm able connect mysql , read/write data. there 1:n-relationship , i'm not able save entities of many side:

    @entity     public class onesideofrelationship {       @id       @generatedvalue(strategy = generationtype.auto)       private long oneid;       private string sometext;       @onetomany(mappedby="oneid")       private list<manysideofrelationship> manyside;        [constructor / getter / setter]     }      @entity     public class manysideofrelationship {       @id       @generatedvalue(strategy = generationtype.auto)       private long manyid;       @manytoone(targetentity=onesideofrelationship.class)       @joincolumn       private long oneid;       private string somemoretext;        [constructor / getter / setter]     }      @transactional     public interface onedao extends crudrepository<onesideofrelationship, long> {}      @transactional     public interface manydao extends crudrepository<manysideofrelationship, long> {} 

if in controller:

    [...]     @autowired     @private manysideofrelationship manydao;     [...]       manysideofrelationship many = new manysideofrelationship();       many.setoneid(1l);       many.setsomemoretext("text");       manydao.save(many);     [...] 

i got:

    org.springframework.orm.jpa.jpasystemexception: not field value reflection getter of com.package.database.onesideofrelationship.oneid; nested exception org.hibernate.propertyaccessexception: not field value reflection getter of com.package.database.onesideofrelationship.oneid 

out of application.properties:

    spring.datasource.url = jdbc:mysql://myurl:myport/mydatabase     spring.datasource.username = myusername     spring.datasource.password = mypassword     spring.jpa.hibernate.ddl-auto = update     spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.improvednamingstrategy     spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.mysql5dialect 

and out of pom.xml

    <dependency>       <groupid>org.springframework.boot</groupid>       <artifactid>spring-boot-starter-data-jpa</artifactid>     </dependency>     <dependency>       <groupid>mysql</groupid>       <artifactid>mysql-connector-java</artifactid>     </dependency> 

hope has idea.

the oneid must datatype of onesideofrelationship not long.

  @manytoone(targetentity=onesideofrelationship.class)   @joincolumn   private onesideofrelationship oneid;