Added a test demonstrating nested column prefix

Author: harawata

src/test/java/org/apache/ibatis/submitted/annotion_many_one_add_columnprefix/CreateDB.sql

@@ -37,6 +37,7 @@ VALUES ('4', 'Learning-commissary');
 CREATE TABLE user (
 id int,
 username varchar(32),
+friend_id int
 );
 
 -- ----------------------------
@@ -48,8 +49,8 @@ INSERT INTO user (id,username)
 VALUES ('2', 'Doug Lea');
 INSERT INTO user (id,username)
 VALUES ('3', 'Rod johnson');
-INSERT INTO user (id,username)
-VALUES ('4', 'Juergen Hoeller');
+INSERT INTO user (id,username, friend_id)
+VALUES ('4', 'Juergen Hoeller', 1);
 
 -- ----------------------------
 -- Table structure for `user_role`

src/test/java/org/apache/ibatis/submitted/annotion_many_one_add_columnprefix/OneManyColumnPrefixTest.java

@@ -78,4 +78,20 @@ void shouldUseColumnPrefixWithOne() {
       assertEquals("teacher", users.get(0).getRole().getName());
     }
   }
+
+  @Test
+  void shouldResolveNestedColumnPrefix() {
+    try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
+      UserDao mapper = sqlSession.getMapper(UserDao.class);
+      User  user = mapper.findUserWithFriend(4);
+      assertEquals(4, user.getId());
+      assertEquals(2, user.getRoles().size());
+      assertEquals("student", user.getRoles().get(0).getName());
+      assertEquals("Learning-commissary", user.getRoles().get(1).getName());
+      assertEquals(1, user.getFriend().getId());
+      assertEquals(2, user.getFriend().getRoles().size());
+      assertEquals("teacher", user.getFriend().getRoles().get(0).getName());
+      assertEquals("Headmaster", user.getFriend().getRoles().get(1).getName());
+    }
+  }
 }

src/test/java/org/apache/ibatis/submitted/annotion_many_one_add_columnprefix/User.java

@@ -23,6 +23,7 @@ public class User {
   private List<User> teachers;
   private Role role;
   private List<Role> roles;
+  private User friend;
 
   public Role getRole() {
     return role;
@@ -72,4 +73,12 @@ public List<User> getTeachers() {
   public void setTeachers(List<User> teachers) {
     this.teachers = teachers;
   }
+
+  public User getFriend() {
+    return friend;
+  }
+
+  public void setFriend(User friend) {
+    this.friend = friend;
+  }
 }

src/test/java/org/apache/ibatis/submitted/annotion_many_one_add_columnprefix/UserDao.java

@@ -69,4 +69,23 @@ public interface UserDao {
     @Result(column = "teacher_name", property = "username")
   })
   List<User> justUseResult();
+
+  @Select({ "select",
+    "     u.id, u.username, r.id role_id, r.name role_name,",
+    "     f.id friend_id, f.username, fr.id friend_role_id, fr.name friend_role_name",
+    "    from user u",
+    "    left join user_role ur on u.id = ur.user_id",
+    "    left join role r on ur.role_id = r.id" ,
+    "    left join user f on u.friend_id = f.id", 
+    "    left join user_role fur on f.id = fur.user_id",
+    "    left join role fr on fur.role_id = fr.id" ,
+    "    where u.id = #{userId} order by r.id, fr.id" 
+    })
+  @Results(id = "userWithFriendMap", value = {
+    @Result(id = true, column = "id", property = "id"),
+    @Result(column = "username", property = "username"),
+    @Result(property = "roles", many = @Many(resultMap = "org.apache.ibatis.submitted.annotion_many_one_add_columnprefix.RoleDao.roleMap1", columnPrefix = "role_")),
+    @Result(property = "friend", one = @One(resultMap = "org.apache.ibatis.submitted.annotion_many_one_add_columnprefix.UserDao.userWithFriendMap", columnPrefix = "friend_"))
+  })
+  User findUserWithFriend(Integer userId);
 }