#92 Use column alias

src/main/java/org/springframework/samples/petclinic/repository/jdbc/JdbcOwnerRepositoryImpl.java

@@ -110,7 +110,7 @@ public class JdbcOwnerRepositoryImpl implements OwnerRepository {
         Map<String, Object> params = new HashMap<>();
         params.put("id", owner.getId());
         final List<JdbcPet> pets = this.namedParameterJdbcTemplate.query(
-                "SELECT pets.id, name, birth_date, type_id, owner_id, visits.id, visit_date, description, pet_id FROM pets LEFT OUTER JOIN visits ON  pets.id = pet_id WHERE owner_id=:id",
+                "SELECT pets.id, name, birth_date, type_id, owner_id, visits.id as visit_id, visit_date, description, pet_id FROM pets LEFT OUTER JOIN visits ON  pets.id = pet_id WHERE owner_id=:id",
                 params,
                 new JdbcPetVisitExtractor()
         );

src/main/java/org/springframework/samples/petclinic/repository/jdbc/JdbcVisitRepositoryImpl.java

@@ -81,7 +81,7 @@ public class JdbcVisitRepositoryImpl implements VisitRepository {
     @Override
     public List<Visit> findByPetId(Integer petId) {
         return this.jdbcTemplate.query(
-                "SELECT id, visit_date, description FROM visits WHERE pet_id=?",
+                "SELECT id as visit_id, visit_date, description FROM visits WHERE pet_id=?",
                 new JdbcVisitRowMapper(), petId);
     }
 

src/main/java/org/springframework/samples/petclinic/repository/jdbc/JdbcVisitRowMapper.java

@@ -33,7 +33,7 @@ class JdbcVisitRowMapper implements RowMapper<Visit> {
     @Override
     public Visit mapRow(ResultSet rs, int row) throws SQLException {
         Visit visit = new Visit();
-        visit.setId(rs.getInt("id"));
+        visit.setId(rs.getInt("visit_id"));
         Date visitDate = rs.getDate("visit_date");
         visit.setDate(new DateTime(visitDate));
         visit.setDescription(rs.getString("description"));