title: HQL Problem
body: <p>Hi every one I have these classe</p>
  
  <pre><code>@Entity
  @Table(name = "login", uniqueConstraints={@UniqueConstraint(columnNames={"username_fk"})})
  public class Login implements Serializable {
  
      @Id
      @Column(name = "id")
      @GeneratedValue
      private int id;
      @Column(name = "password", length = 64)
      private String password;
      @Column(name = "roles", length = 32)
      private String roles;
      @OneToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
      @OnDelete(action=OnDeleteAction.CASCADE)
      @Cascade(org.hibernate.annotations.CascadeType.DELETE_ORPHAN)
      @JoinColumn(name = "username_fk", nullable=false)
      private Branch branch;
      //some getter and sette
  </code></pre>
  
  <p>and  </p>
  
  <pre><code>@Entity
  @Table(name = "branch", uniqueConstraints = {@UniqueConstraint(columnNames = {"bname", "branch_fk"})})
  public class Branch implements Serializable {
  
      @Id
      @GeneratedValue
      private int id;
      @Column(name = "username", length = 64, nullable=false)
      private String userName;
      @Column(name = "bname", length = 64)
      private String branchName;
      @Column(name = "officername", length = 64)
      private String officerName;
      @Column(name = "studcount")
      private int studCount;
      @Column(name = "blevel", columnDefinition="int default 0")
      private int level;
      @Column(name = "officeremail", length = 64)
      private String officerEmail;   
      @Column(name = "confirmed", columnDefinition = "tinyint default 0")
      private int confirmed;
  
      @OneToOne(mappedBy = "branch", fetch = FetchType.LAZY, cascade = CascadeType.ALL)
      @OnDelete(action=OnDeleteAction.CASCADE)
      @Cascade(org.hibernate.annotations.CascadeType.DELETE_ORPHAN)
      private Login login;
  </code></pre>
  
  <p>when i use this Query :</p>
  
  <pre><code>executeQuery("select l from Login as l inner join l.branch as b where l.branch.bname = ?", username)
  </code></pre>
  
  <p>or this:</p>
  
  <pre><code>executeQuery("select b.login from Branch b where b.username = ?", username)
  </code></pre>
  
  <p>I have get this error:</p>
  
  <pre><code>org.hibernate.QueryException: could not resolve property: bname of: Data.Entity.Branch
  </code></pre>
  
  <p>but when use this code:</p>
  
  <pre><code>executeQuery("select b.login from Branch b where b.id = ?", username)
  it's return correct result
  </code></pre>
  
  <p>I means this type of HQL just work for Primary key? or my maping have problem?
  is there any way that I can use other field(except Primary Key) form joinable table?</p>