Hi, i'm trying to create a dataservice to conect a database with my datagrid, but i get this errorError: Item requested at index 0 was null and should not have been. Error for service 'usuario' at mx.data::DataList/http://www.macromedia.com/2005/flex/mx/internal::requestItemAt() at mx.data::DataList/getItemAt() at mx.collections::ListCollectionView/getItemAt() at mx.collections::ListCollectionViewCursor/seek() at mx.controls.listclasses::ListBase/modelChanged() at mx.controls::DataGrid/modelChanged() at flash.events::EventDispatcher/dispatchEvent() at mx.collections::ListCollectionView/dispatchEvent() at mx.collections::ListCollectionView/http://www.macromedia.com/2005/flex/mx/internal::reset() at mx.collections::ListCollectionView/mx.collections:ListCollectionView::listChangeHandler() at flash.events::EventDispatcher/dispatchEvent() at mx.data::DataList/http://www.macromedia.com/2005/flex/mx/internal::processSequenceResult() at C:\dev\enterprise_beta1\frameworks\mx\data\errors\DataServiceError.as$34::DataListRequestResponder/result() at mx.rpc::AsyncRequest/acknowledge() at C:\dev\enterprise_beta1\frameworks\libs\framework.swc(mx/core/mx_internal)$35::NetConnectionMessageResponder/result()I'm using:Windows XP servicepack 2Mozilla Firefox 1.5 (i've also tryed ie, but i get the same error)Flex 2.0 beta 1Flex Enterprise Services 2.0 beta 1Flash Player 8.5 Alpha 3 (build 211)
ListaUsuarios.mxmlimport mx.collections.ArrayCollection; import mx.data.DataService; public var ds:DataService; [Bindable] public var usuarios:ArrayCollection; public function initApp() { usuarios = new ArrayCollection(); ds = new DataService("usuario"); ds.fill(usuarios); }
flex-data-service.xmlserviceadaptersadapter-definition id="actionscript" class="flex.data.adapters.ASObjectAdapter" default="true"/adapter-definition id="java-dao" class="flex.data.adapters.JavaAdapter"//adaptersdefault-channelschannel ref="my-rtmp"//default-channelsdestination id="usuario" adapter ref="java-dao" /propertiesmetadataidentity property="idusuario"//metadatanetworksession-timeout0/session-timeoutpaging enabled="false" /throttle-inbound policy="ERROR" max-frequency="500"/throttle-outbound policy="REPLACE" max-frequency="500"//networkserverassemblerclassusuarios.UsuarioAssembler/classsingletontrue/singleton/assemblerfill-methodnameloadUsuarios/name/fill-method/server/properties/destination/service
UsuarioAssembler.javapackage usuarios;import java.util.List;public class UsuarioAssembler{ public List loadUsuarios() { UsuarioDAO dao = new UsuarioDAO(); return dao.getUsuarios(); }}UsuarioDAO.javapackage usuarios;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;import java.util.ArrayList;import java.util.List;public class UsuarioDAO{ public List getUsuarios() throws DAOException { ArrayList list = new ArrayList(); Connection c = null; try { c = ConexionBD.getConexion(); Statement s = c.createStatement(); ResultSet rs = s.executeQuery("SELECT * FROM alumnos ORDER BY nombre"); Usuario usuario; while (rs.next()) {usuario = new Usuario();usuario.setIdUsuario(rs.getString("id_usuario"));usuario.setPassword(rs.getString("password"));usuario.setNombre(rs.getString("nombre"));list.add(usuario); } } catch (SQLException e) { e.printStackTrace(); throw new DAOException(e); } finally { ConexionBD.cerrarConexion(c); } return list; }}Everything in java works correctly, but when i try to call it from flex doesn't work.If anybody can help me, i will be very pleased.Thanks in advance.--Manuel Bordallo[EMAIL PROTECTED]
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