Serialize nhibernate entity to json error: Cannot serialize a Session while connected

Question

I'm trying to serialize an nhibernate entity in to json but I always get this error saying Cannot serialize a Session while connected? Does it has something to do with nhibernate proxy?

Community · Accepted Answer · 2017-05-23 12:26:04Z

15

I started getting the same error when I switched from System.Web.Script.Serialization.JavaScriptSerializer to Newtonsoft.Json.

Using the contract resolver from this answer fixed this problem:

string output = JsonConvert.SerializeObject(theObject,
                new JsonSerializerSettings()
                {
                    ContractResolver = new NHibernateContractResolver()
                });

edited May 23, 2017 at 12:26

CommunityBot

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answered Aug 22, 2012 at 21:16

Zar Shardan

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Darin Dimitrov · Accepted Answer · 2011-05-02 06:20:36Z

7

Yes, this is related to lazy loading. You will need to configure NHibernate to eagerly fetch associations if you want to be able to JSON serialize it. But I would recommend you using view models instead. Ayende Rahien blogged about this issue.

answered May 2, 2011 at 6:20

Darin Dimitrov

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