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How to concatenate two columns using hibernate queryover using linq

I want to concat the first and last name of an employee in the select clause, but it gives:

Could not determine member from new <> f__AnonymousType0`1 (name = Format ("{0} {1}", x.FirstName, x.LastName))

var returnData = UnitOfWork.CurrentSession.QueryOver<Employee>()
                 .OrderBy(x => x.Id).Asc
                 .SelectList(u => u.Select(x => x.Id).WithAlias(() => 
                                           businessSectorItem.id)
                                   .Select(x => new { name = string.Format("{0} {1}",
                                                x.FirstName, x.LastName) })
                                                .WithAlias(() => businessSectorItem.text))
                                   .Where(x => (x.FirstName.IsInsensitiveLike
                                                  ("%" + searchTerm + "%") ||
                                                x.LastName.IsInsensitiveLike
                                                  ("%" + searchTerm + "%")) &&
                                                  ( x.Account == null || x.Account.Id ==
                                                                           accountId))
                                  .TransformUsing(Transformers
                                                  .AliasToBean<SearchEmployeeItemDto>())
                                  .Take(limit)
                                  .List<SearchEmployeeItemDto>();
+3


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2 answers


The syntax QueryOver

will look like this:

// instead of this
.Select(x => new { name = string.Format("{0} {1}",
     x.FirstName, x.LastName) })
     .WithAlias(() => businessSectorItem.text))                                   

// we should use this
.Select(
    Projections.SqlFunction("concat", 
        NHibernateUtil.String,
        Projections.Property<Employee>(e => e.FirstName),
        Projections.Constant(" "),
        Projections.Property<Employee>(e => e.LastName)
    )).WithAlias(() => businessSectorItem.text)


We profit from the sql concat function. We pass the instruction Projections.SqlFunction

to Select()

and create the part using the standard / baseProjections

+5


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Or even easier now:



using NHibernate.Criterion;

SelectList(l => l
  .Select(x => Projections.Concat(m.FirstName, ", ", m.LastName))
  .WithAlias(() => businessSectorItem.text))
)
+4


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