from User u where u.Username = :username and :roleName in elements(u.Roles)
SetMaxResult(1).UniqueResult<User>()
!= null


2009/10/8 Andy Kernahan <[email protected]>

>
> Hi there,
>
> I am trying create a query using HQL which checks to see if a user has
> been assigned a certain role. I thought I would be able us:
>
> select exists(from User u where u.Username = :username and :roleName
> in elements(u.Roles))
>
> and then call UniqueResult<bool>() on the query object, except
> ISession.CreateQuery throws a QuerySyntaxException with the following
> message:
>
> Exception of type 'Antlr.Runtime.MismatchedTreeNodeException' was
> thrown. near line 1, column 7 [select exists(from
> Tss.PIBench.Model.User u where u.Username = :username and :roleName in
> elements(u.Roles))]
>
> I have removed the select exists from the statement and queried it to
> ensure that it is correct.
>
> Can I not use select exists this way? I would prefer not to have to
> select count(*) ... > 0.
>
> The user class is as follows:
>
> class User {
>    ISet<string> Roles ...
>    string Username ...
>    ...
> }
>
> Any help would be most appreciated.
>
> Andy.
>
>
>
>
>
> >
>


-- 
Fabio Maulo

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