Hibernate Search DSL and Lucene query on Multiple Fields - lucene

Question

I'm not really sure how involved this might be, but could someone help me with below problem.
I'm trying to implement search functionality in my project based on employee firt and last name. I have used Spring Data REST and Hibernate Search for this purpose.
#Transactional
public search(String searchText) {
FullTextEntityManager fullTextEntityManager = org.hibernate.search.jpa.Search
.getFullTextEntityManager(entityManager);
QueryBuilder qb = fullTextEntityManager.getSearchFactory().buildQueryBuilder().forEntity(Employee.class).get();
org.apache.lucene.search.Query luceneQuery = qb.keyword().wildcard()
.onFields("firstName", "middleName", "lastName").matching(searchText + "*").createQuery();
javax.persistence.Query jpaQuery = fullTextEntityManager.createFullTextQuery(luceneQuery, Employee.class);
List result = jpaQuery.getResultList();
List<EmployeeSearchDTO> listOfDTO = new ArrayList<>();
EmployeeSearchDTO employeeDTO;
Iterator<Employee> itr = result.iterator();
while (itr.hasNext()) {
Employee employee = itr.next();
employeeDTO = new EmployeeSearchDTO(employee);
listOfDTO.add(employeeDTO);
}
}
When I search "john doe" i expect the results should match the below two
FirstName : John LastName : Doe
FirstName : johnathan LastName : Doe
But that is not the case and I'm able to search only based on FirstName["john"] or LastName["doe"] but not with both.
How do I solve this, any pointers would be greatly appreciated. Thanksin advance.

Answer 1

You really want to create two queries, one against the first name and one against the last name and then combine them via the SHOULD operator. Something like
Query combinedQuery = querybuilder
.bool()
.should( firstNameQuery )
.should( lastNameQuery )
.createQuery();
This means you are looking for results where either of the queries match.