Left Outer join in Ebean query - playframework-2.1

Question

i have same problem like others (not solved questions)!
when i use fetch('userWorkItems') the generated sql query will have both LEFT OUTER JOIN and JOIN over TbUserWorkItem.
i need to be only left outer join over TbUserWorkItem Table!
how i can resolve that?
my first Model :
#Entity
#Table(name = "TbWorkItem", schema = "mySchema")
public class TbWorkItem extends Model {
#Id
public Integer id;
public Integer code;
/* some other properties here */
#JsonIgnore
#OneToMany//(mappedBy = "workItem")
public List<TbUserWorkItem> userWorkItems;
public static Finder<Byte, TbWorkItem> find = new Finder(Byte.class, TbWorkItem.class);
public static List<TbWorkItem> all(Integer systemId, Integer workingUserId) {
/* return find
.fetch("userWorkItems")
.where()
.eq("system.id", systemId).eq("workItemInformationType.code", 1)
.or(
Expr.eq("publicWorkItemYesNo.code", 1),
Expr.and(Expr.eq("publicWorkItemYesNo.code", 2), Expr.eq("userWorkItems.workingUserId", workingUserId)))
.findList();
*/
return find
.where()
.eq("system.id", systemId).eq("workItemInformationType.code", 1)
.or(
Expr.eq("publicWorkItemYesNo.code", 1),
Expr.and(Expr.eq("publicWorkItemYesNo.code", 2), Expr.eq("userWorkItems.workingUserId", workingUserId)))
.findList();
}
}
and second Model :
#Entity
#Table(name="TbUserWorkItem",schema="mySchema")
public class TbUserWorkItem extends Model {
#Id
public Integer id;
/* some properties here */
#ManyToOne
#JoinColumn(name="WorkItemId")
public TbWorkItem workItem;
public static Finder<Integer,TbUserWorkItem> find=new Finder(Integer.class,TbUserWorkItem.class);
/*some methods here*/
}

Answer 1

after some work and googling I forced to use string query useing raw expression like this :
return Ebean.find(TbWorkItem.class)
.where().raw(
"system.id=? and workItemInformationType.code =1 and (publicWorkItemYesNo.code=1 or userWorkItems.workingUserId = ?)",new Object[]{systemId,workingUserId})
.findList();
}
perhaps help others!
but i welcome to any answers that use ebean query to solve the problem rather than raw string.