private static string GetDescriptionValue(GenericsModelMetadata metadata, object model)
{
if (model != null)
return model.ToString();
return null;
}
private static Type GetIdMemberType(GenericsModelMetadata metadata)
{
if (metadata.IdMember.MemberType == MemberTypes.Property)
return ((PropertyInfo)metadata.IdMember).PropertyType;
if (metadata.IdMember.MemberType == MemberTypes.Field)
return ((FieldInfo)metadata.IdMember).FieldType;
throw new InvalidOperationException(
String.Format("IdMember {0} configured for model {1} should be field or property.",
metadata.IdMember.Name, metadata.DisplayName));
}
private static object GetIdValue(GenericsModelMetadata metadata, object model)
{
if (model == null || metadata.IdMember == null)
return null;
if (metadata.IdMember.MemberType == MemberTypes.Property)
return ((PropertyInfo)metadata.IdMember).GetValue(model, new object[] {});
if (metadata.IdMember.MemberType == MemberTypes.Field)
return ((FieldInfo)metadata.IdMember).GetValue(model);
return null;
}
private SelectList BuildSelectList(GenericsModelMetadata metadata)
{
var provider = ConfigurationHolder.DomainAccessorAccessor.Invoke(metadata.ReferenceType);
if (provider == null)
throw new InvalidOperationException(String.Format("The domain provider for the type {0} is invalid.", metadata.ReferenceType));
var referenceMetadata = GetMetadataForTypeImpl(() => null, metadata.ReferenceType);
if (referenceMetadata.IdMember == null)
{
throw new InvalidOperationException(String.Format(
"{0} is configured as a reference type but it hasn't an Id property. " +
"Consider configuring the Id property or excluding the type via the " +
"ExcludeReferenceTypes property in the ReferencePatternApplier.",
metadata.ReferenceType));
}
var list = provider.GetList();
var selectList = list.Select(
referenceValue => new SelectListItem
{
Value = GetIdValue(referenceMetadata, referenceValue).ToString(),
Text = GetDescriptionValue(referenceMetadata, referenceValue)
}).ToList();
// TODO: probar si podemos usar esta sobrecarga (viendo el Equals)
// return new SelectList(selectList, GetIdValue(metadata, metadata.Model));
return new SelectList(selectList, "Value", "Text", GetIdValue(referenceMetadata, metadata.Model));
}