internal object LoadRelation(object parentObject)
{
var localFieldValue = LocalField.GetField(parentObject);
var foreignRepository = ForeignSchema.Repository;
if (IsToOne)
{
var serializedForeignObject = localFieldValue == null ? null : foreignRepository.DataProvider.ReadObject(new Dictionary <string, object> {
{ ForeignField.MappedName, localFieldValue }
}, ForeignSchema);
var relationObject = serializedForeignObject != null?Ir.WithLoadedRelations(ForeignSchema.UpdateObject(Activator.CreateInstance(FieldType), serializedForeignObject), ForeignSchema.DatasetRelations) : null;
if (ReverseRelation != null)
{
relationObject = ReverseRelation.SetField(relationObject, parentObject);
}
return(relationObject);
}
if (RelationType == RelationType.OneToMany)
{
var parameter = Expression.Parameter(ElementType, "x");
Expression exp1 = Expression.MakeMemberAccess(parameter, ForeignField.FieldInfo);
Expression exp2 = Expression.Constant(localFieldValue, LocalField.FieldType);
if (exp2.Type != exp1.Type)
{
exp2 = Expression.Convert(exp2, exp1.Type);
}
var filter = new FilterSpec(Expression.Lambda(Expression.Equal(exp1, exp2), parameter));
if (IsDataSet)
{
return(Activator.CreateInstance(typeof(DataSet <>).MakeGenericType(ElementType), ForeignSchema.Repository, filter, this, parentObject));
}
else
{
return(CreateCollection(foreignRepository.GetRelationObjects(foreignRepository.CreateQuerySpec(filter), this, parentObject)));
}
}
return(null);
}