/// <summary>
/// Obtiene la clave primaria de un elemento TModel
///
/// Nota: Este método solo funciona para Models cuya clave primaria sea una única columna
/// </summary>
/// <param name="model">Elemento sobre el que se obtendrá la clave primaria</param>
/// <returns>Clave del elemento</returns>
static internal T PrimaryKey <T>(this Controller controller, object model)
{
T id = default(T);
if (model == null)
{
return(id);
}
Type t = model.GetType();
DbContext db = DbContext;
var objectContext = ((IObjectContextAdapter)db).ObjectContext;
MethodInfo m = objectContext.GetType().GetMethod("CreateObjectSet", new Type[] { });
MethodInfo generic = m.MakeGenericMethod(t);
object set = generic.Invoke(objectContext, null);
PropertyInfo entitySetPI = set.GetType().GetProperty("EntitySet");
System.Data.Entity.Core.Metadata.Edm.EntitySet entitySet = (System.Data.Entity.Core.Metadata.Edm.EntitySet)entitySetPI.GetValue(set, null);
string[] keyProperties = entitySet.ElementType.KeyMembers.Select(k => k.Name).ToArray();
if (keyProperties.Count() == 0)
{
return(id);
}
id = NetLibrary.Reflection.Manager.GetPropertyValue <T>(model, keyProperties[0]);
return(id);
}
private EntityKey CreateEntityKey(System.Data.Entity.Core.Metadata.Edm.EntitySet entitySet, object[] keyValues)
{
if (keyValues == null || !keyValues.Any() || keyValues.Any(v => v == null))
{
throw new ArgumentException("Parameter keyValues cannot be empty or contain nulls.");
}
var keyNames = entitySet.ElementType.KeyMembers.Select(m => m.Name).ToList();
if (keyNames.Count != keyValues.Length)
{
throw new ArgumentException("Invalid number of key values.");
}
return(new System.Data.Entity.Core.EntityKey(entitySet.EntityContainer.Name + "." + entitySet.Name, keyNames.Zip(keyValues, (name, value) => new KeyValuePair <string, object>(name, value))));
}
