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PONHibernate - Retrieve specific columns and count using criteria query
 

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    <p>This is my mapping file:</p> <pre><code>class name="CRMStradCommon.Entities.OportunidadEntity,CRMStradCommon" table="oportunidad"&gt; &lt;id name="Id" column="id" type="int"&gt; &lt;generator class="native" /&gt; &lt;/id&gt; &lt;property name="Titulo" column="titulo" type="string" not-null="true" /&gt; &lt;many-to-one name="Estado" column="estado" class="CRMStradCommon.Entities.EstadoOportunidadEntity,CRMStradCommon" /&gt; &lt;many-to-one name="Dueno" column="dueno" class="CRMStradCommon.Entities.ContactoEntity,CRMStradCommon" /&gt; &lt;property name="FechaCierreEstimado" column="fecha_cierre_estimado" type="DateTime" not-null="false"/&gt; &lt;property name="FechaVencimiento" column="fecha_vencimiento" type="DateTime" not-null="false"/&gt; &lt;/class&gt; </code></pre> <p>This is the other with joined-subclass</p> <pre><code>class name="CRMStradCommon.Entities.ContactoEntity,CRMStradCommon" table="contacto" dynamic-update="true"&gt; &lt;id name="Id" column="id" type="int"&gt; &lt;generator class="native" /&gt; &lt;/id&gt; &lt;property name="Nombre" column="nombre" type="string" not-null="true" /&gt; &lt;property name="Email1" column="email1" type="string" /&gt; &lt;property name="Email2" column="email2" type="string" /&gt; &lt;property name="Web1" column="web1" type="string" /&gt; &lt;property name="Web2" column="web2" type="string" /&gt; &lt;bag name="DuenoOportunidadList" lazy="true" inverse="true"&gt; &lt;key column="dueno"/&gt; &lt;one-to-many class="CRMStradCommon.Entities.OportunidadEntity,CRMStradCommon"/&gt; &lt;/bag&gt; &lt;joined-subclass name="CRMStradCommon.Entities.EmpresaEntity,CRMStradCommon" table="empresa" lazy="false"&gt; &lt;key column="id" /&gt; &lt;many-to-one name="Categoria" column="categoria" class="CRMStradCommon.Entities.CategoriaEmpresaEntity,CRMStradCommon" /&gt; &lt;many-to-one name="Calificacion" column="calificacion" class="CRMStradCommon.Entities.CalificacionEmpresaEntity,CRMStradCommon" /&gt; &lt;/joined-subclass&gt; &lt;joined-subclass name="CRMStradCommon.Entities.PersonaEntity,CRMStradCommon" table="persona" lazy="false"&gt; &lt;key column="id" /&gt; &lt;property name="Saludo" column="saludo" type="string" /&gt; &lt;property name="Apellido" column="apellido" type="string" /&gt; &lt;property name="SegundoNombre" column="segundo_nombre" type="string" /&gt; &lt;/joined-subclass&gt; &lt;/class&gt; </code></pre> <p>How can I make this query with criteria?</p> <pre><code>SELECT contacto.id, contacto.nombre, persona.apellido, COUNT(*) AS Cant FROM contacto INNER JOIN oportunidad ON contacto.id = oportunidad.dueno LEFT OUTER JOIN persona ON contacto.id = persona.id LEFT OUTER JOIN empresa ON contacto.id = empresa.id GROUP BY contacto.id, contacto.nombre, persona.apellido ORDER BY contacto.nombre, persona.apellido </code></pre> <p>Thanks a lot!</p> <p>Thanks a lot! It solved a part of my problem. I did this:</p> <pre><code>ICriteria criteria = session.CreateCriteria(typeof(ContactoEntity)); criteria.SetProjection(Projections.ProjectionList() .Add(Projections.GroupProperty("Id"),"Id") .Add(Projections.GroupProperty("Nombre"),"Nombre") .Add(Projections.GroupProperty("Apellido"), "Apellido") .Add(Projections.GroupProperty("TipoContacto"), "TipoContacto") .Add(Projections.RowCount(),"CantOportunidadesDueno")); criteria.CreateCriteria("DuenoOportunidadList"); criteria.AddOrder(Order.Asc("Nombre")).AddOrder(Order.Asc("Apellido")); criteria.SetResultTransformer( new NHibernate.Transform.AliasToBeanResultTransformer(typeof(ContactoEntity))); IList&lt;ContactoEntity&gt; ContLst = (criteria.List&lt;ContactoEntity&gt;()); </code></pre> <p>I used Transformer in order to make a collection of <code>Contacto</code> entities, but the problem is with property <code>Apellido</code>. I have it in subclass Persona and the collection is made only with parent class and not with children classes.</p> <p>do you know if it is possible to solve that? or the only solution I have is to go throw each collection item without using transformer and creating a new collection of Contacto entities creating each new object?</p> <p>Thanks!!!</p>
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