A circular reference was detected while serializing an object of type
JsonResult"
External issue. You should manage the serialization of your entities NH does
not have nothing to do with it.
2009/8/10 William Chang <diehardb...@gmail.com>
>
> I have two entities, "List" and "ListItem". My "List" entity have a
> parent property: "public virtual List listParent {get;set;}". My
> queries works when "listParent" is null, but when I set a parent for
> example, "Countries" parent list, and the child list is "States". When
> I do a query on "ListItem" to pulls items for "States" I got an error:
> "A circular reference was detected while serializing an object of type
> JsonResult".
>
> What I found during debugging causing the error:
> I did a query on the "ListItem" to pull all the items, but I want only
> from the "States", so I need to tell NHibernate to do a "WHERE clause"
> with the "listId" column. The nature of NHibernate, it queries the
> "List" table for "States" and continue to query into the "listParent",
> which I don't need.
>
> 1. How do I limit the query to just the "listId" column in the "List"
> table??? Because, the "List" table has a "listParent" column, which
> NHibernate continue to query into.
> 2. I don't know why NHibernate need to include the "List" table to do
> a "WHERE clause" on the "listId", even though the "ListItem" table
> already has a "listId" column???
>
> Code Snippet:
> /// <summary>Get items.</summary>
> public static IList<Models.ListItem> GetItems(Guid categoryId) {
> return Models.ListItem.FindAll(new ICriterion[] {
> Restrictions.And(
> Restrictions.Eq("itemList.listId", categoryId),
> Restrictions.Eq("itemIsDeleted", false)
> )
> });
> }
>
> Specs:
> NHibernate 2.1.0GA
> Castle ActiveRecord 2.0
>
> Thank you for your help,
> William Chang
> >
>
--
Fabio Maulo
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