Hi Rob,
Thank you for the reply..I had corrected the correction you suggested query
syntax, but still I m facing another problem while fetching the values from
db I was not sure about how to refere the third table employeeproject fields
in to the query where I have class fields of Employee and Project in this
EmployeeProject class but how can I refer the respective id
fields(employeeId and projectId) in to the query. I was not sure about it
kindly guide.
Regards
Trish.
Following error found:
2008-04-08 16:54:22.215::WARN: Nested in javax.servlet.ServletException:
javax.servlet.ServletException: java.lang.IllegalStateException: No data
type for node: org.hibernate.hql.ast.tree.IdentNode
\-[IDENT] IdentNode: 'employeeId' {originalText=employeeId}
:
javax.servlet.ServletException: java.lang.IllegalStateException: No data
type for node: org.hibernate.hql.ast.tree.IdentNode
\-[IDENT] IdentNode: 'employeeId' {originalText=employeeId}
at
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:515)
at
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:419)
at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at
org.appfuse.webapp.filter.StaticFilter.doFilterInternal(StaticFilter.java:106)
Rob Hills wrote:
>
> Hi Trish,
>
> Trish wrote:
>> Hi
>>
>> Im new to appfuse and trying to implement manay to many relation for
>> Employee Project tables, the created model classes as follows
>>
> At a quick glance, your entities look OK to me.
>> public List<Employee> getByProject(Long projectId, Long periodId) {
>> return getHibernateTemplate().find("from Employee where employeeId in "
>> +
>> "(select employeeId from EmployeesProject " +
>> "where projectId=?"+ projectId+")");
>> }
>>
> However, you're mixing styles with your search expression and that won't
> help you at all. You're trying to use a parameter placeholder (the ? in
> "where projectId=?") but then you're appending the value to your query
> string instead of setting the parameter value. The last line of your
> search expression should either be:
>
> "where projectId=" + projectId + ")");
>
> or
>
> "where projectId=?)", projectId, Hibernate.LONG);
>
> I believe the second approach is considered safer as the persistence
> mechanism looks after security problems like "SQL Injection" for you.
> It is also likely to perform better.
>
> To learn more about Hibernate, you're better off examining Hibernate
> documentation, starting somewhere like here:
> http://www.hibernate.org/5.html
>
> I don't think that the AppFuse project will have a lot of information
> about using Hibernate as that task really belongs to the Hibernate
> project.
>
> HTH,
>
> Rob Hills
> Waikiki, Western Australia
>
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