Invalid column name error - grails

Question

I am trying to sort by transient property but fails with SQL Error: Invalid column name error .
Pls find below my code :
In domain class declared :
static transients = ['sortCandidateLastName']
Query which I am trying to execute:
When I am trying to run the below query in Oracle :It runs fine
( select * from ( select row_.* ,rownum rownum_ from ( select * from booking b where b.marked_deleted='N' order by (select c.cand_id from candidate c where b.cand_id = c.cand_id) asc ) row_ where rownum <= 15 ) where rownum > 0)
GSP code:
<g:sortableColumn property="sortCandidateLastName" title="Sort By Candidate Last Name" />
But when Hibernate is trying to read it ,it throws Invalid column name : ResultSet.getInt(clazz_)

Answer 1

Transient properties are not persisted so it's impossible to write a query which sorts by a transient property. If you retrieve a list of objects from a query and want to sort them by a transient property, you'll have to do it in Groovy code, e.g.
// an example domain class with a transient property
class Book {
private static Long SEQUENCE_GENERATOR = 0
String isbn
String title
Long sequence = ++SEQUENCE_GENERATOR
static transients = ['sequence']
}
// get a list of books from the DB and sort by the transient property
def books = Book.list()
books.sort { it.sequence }

Answer 2

You cant sort on transient field. There is no actual database column for a transient field! So your sql would always throw an error!

Answer 3

I tried using jdbcTemplate and gives me the required functionality.
Code snippet:
GSP Layer:
<g:sortable property="sortCandidateLastName">
<g:message code="booking.alphabetical.label" default="Alphabetical(A-Z)" />
</g:sortable>
Domain layer:
just defined a transient property :
static transients = ['sortCandidateLastName']
Reason for adding the transient field : SO that it doesn't throw me any exception like missing property.
Controller layer :
if(params.sort == "sortCandidateLastName" )
{
bookingCandList= bookingService.orderByCandidateLastName(params.max, params.order,params.offset.toInteger())//Booking.getSortCandidateLastName(params.max, params.order,params.offset.toInteger()) //
}
Service layer :
def jdbcTemplate
public List orderByCandidateLastName(Integer max, String sortOrder,Integer offset) {
println "Inside the getcandidateLastName ${max} :: offset ${offset}"
def sortedList
int minRow = offset
int maxRow = offset+max
String queryStr = " select * from " +
" ( "+
" select row_.* " +
" ,rownum rownum_ " +
" from " +
" ( " +
" select * from booking b where b.item_id= 426 and b.marked_deleted='N' order by " +
" (select c.cand_id from candidate c where b.cand_id = c.cand_id) ${sortOrder} "+
" ) row_ "+
"where rownum <= ${maxRow} " +
") " +
"where rownum > ${minRow}"
return jdbcTemplate.queryForList(queryStr)
}
Configuration of JDBC template :
// Place your Spring DSL code here
import org.springframework.jdbc.core.JdbcTemplate
beans = {
..........
jdbcTemplate(JdbcTemplate) {
dataSource = ref('dataSource')
}
}
Hope it helps to ..
Cheers