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9.2

A circular reference was detected while serializing an object of type Divisions

Asked by nkkarn in Programming for ASP.NET, Web Frameworks, MVC

Tags: NHibernate, MVC

I have MVC application which uses NHibernate.It has BDivision class with mathod GetAllDivision in business layer and it returns IList<Divisions>.  I want to make ajax call which should return json object of Divisions.  here is my code for ajax call.

public JsonResult test() {
            IList<Divisions> dv;
            BDivison od = new BDivison();
            dv = od.GetAllDivision();          
            return Json(dv);
      }
From firebug response, I get the following error.
A circular reference was detected while serializing an object of type Divisions.
Anybody know what is the problem BTW I am using NHibernate 2.0, MVC  with VS 2008. 
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Here  is my Divisions Class 
/*
Created using Microdesk MyGeneration NHibernate Template v1.1
[based on MyGeneration/Template/NHibernate (c) by Sharp 1.4]
*/
using System;
using System.Collections;
using System.Collections.Generic;
 
namespace IIIS.DataTransfer
{
 
	/// <summary>
	/// IDivisions interface for NHibernate mapped table 'DIVISIONS'.
	/// </summary>
	public interface IDivisions
	{
		#region Public Properties
		
		int DivisionId
		{
			get ;
			set ;
			  
		}
		
		string Name
		{
			get ;
			set ;
			  
		}
		
		MastersystemCollection FkMastersystemDivisions_MastersystemCollection
		{
			get ;
			set ;
		}
		
		
		IList<Mastersystem> FkMastersystemDivisions
		{
			get ;
			set ;
			  
		}
		
		SecurityCollection FkSecurityDivisions_SecurityCollection
		{
			get ;
			set ;
		}
		
		
		IList<Security> FkSecurityDivisions
		{
			get ;
			set ;
			  
		}
		
		bool IsDeleted { get; set; }
		bool IsChanged { get; set; }
		
		#endregion 
	}
 
	/// <summary>
	/// Divisions object for NHibernate mapped table 'DIVISIONS'.
	/// </summary>
	[Serializable]
	public partial class Divisions : IDivisions
	{
		#region Member Variables
 
		protected int _divisionid;
		protected string _name;
		protected IList<Mastersystem> _fkmastersystemdivisions;
		protected IList<Security> _fksecuritydivisions;
		protected bool _bIsDeleted;
		protected bool _bIsChanged;
		#endregion
		
		#region Constructors
		public Divisions() {}
			
		public Divisions(string pName)
		{
			this._name = pName; 
		}
				
		public Divisions(int pDivisionId)
		{
			this._divisionid = pDivisionId; 
		}
		
		#endregion
		
		#region Public Properties
		
		public virtual int DivisionId
		{
			get { return _divisionid; }
			set { _bIsChanged |= (_divisionid != value); _divisionid = value; }
			
		}
		
		public virtual string Name
		{
			get { return _name; }
			set 
			{
			  if (value != null && value.Length > 50)
			    throw new ArgumentOutOfRangeException("Name", "Name value, cannot contain more than 50 characters");
			  _bIsChanged |= (_name != value); 
			  _name = value; 
			}
			
		}
		
		public virtual MastersystemCollection FkMastersystemDivisions_MastersystemCollection
		{
			get { MastersystemCollection col = new MastersystemCollection( _fkmastersystemdivisions ); _fkmastersystemdivisions = col.GetList(); return col; }
			set { _bIsChanged |= (_fkmastersystemdivisions != value); _fkmastersystemdivisions = value.GetList(); }
		}
		
		[System.Xml.Serialization.XmlIgnore]
		public virtual IList<Mastersystem> FkMastersystemDivisions
		{
			get { return _fkmastersystemdivisions; }
			set { _bIsChanged |= (_fkmastersystemdivisions != value); _fkmastersystemdivisions = value; }
			
		}
		
		public virtual SecurityCollection FkSecurityDivisions_SecurityCollection
		{
			get { SecurityCollection col = new SecurityCollection( _fksecuritydivisions ); _fksecuritydivisions = col.GetList(); return col; }
			set { _bIsChanged |= (_fksecuritydivisions != value); _fksecuritydivisions = value.GetList(); }
		}
		
		[System.Xml.Serialization.XmlIgnore]
		public virtual IList<Security> FkSecurityDivisions
		{
			get { return _fksecuritydivisions; }
			set { _bIsChanged |= (_fksecuritydivisions != value); _fksecuritydivisions = value; }
			
		}
		
 
		public virtual bool IsDeleted
		{
			get
			{
				return _bIsDeleted;
			}
			set
			{
				_bIsDeleted = value;
			}
		}
		
		public virtual bool IsChanged
		{
			get
			{
				return _bIsChanged;
			}
			set
			{
				_bIsChanged = value;
			}
		}
		
		#endregion 
		
		#region Equals And HashCode Overrides
		/// <summary>
		/// local implementation of Equals based on unique value members
		/// </summary>
		public override bool Equals( object obj )
		{
			if( this == obj ) return true;
			Divisions castObj = null;
			try
			{
				castObj = (Divisions)obj;
			} catch(Exception) { return false; } 
			return ( castObj != null ) &&
				( this._divisionid == castObj.DivisionId );
		}
		/// <summary>
		/// local implementation of GetHashCode based on unique value members
		/// </summary>
		public override int GetHashCode()
		{
		  
			
			int hash = 57; 
			hash = 27 * hash * _divisionid.GetHashCode();
			return hash; 
		}
		#endregion
				
		#region Public Property and Mapping Constants
 
		//Nested class to provide strongly-typed access to property names (for .NET databinding, etc.)
		public static class PropertyNames
		{
			public const string Divisions = "Divisions";			
			public const string DivisionId = "DivisionId";			
			public const string Name = "Name";
			public const string FkMastersystemDivisions_MastersystemCollection = "FkMastersystemDivisions_MastersystemCollection";			
			public const string FkMastersystemDivisions = "FkMastersystemDivisions";
			public const string FkSecurityDivisions_SecurityCollection = "FkSecurityDivisions_SecurityCollection";			
			public const string FkSecurityDivisions = "FkSecurityDivisions";			
		}
		
		//Nested class to provide strongly-typed access to mapping names (for NHibernate Queries, etc.)
		public static class MappingNames
		{
			public const string Divisions = "Divisions";			
			public const string DivisionId = "DivisionId";			
			public const string Name = "Name";
			public const string FkMastersystemDivisions_MastersystemCollection = "FkMastersystemDivisions_MastersystemCollection";			
			public const string FkMastersystemDivisions = "FkMastersystemDivisions";
			public const string FkSecurityDivisions_SecurityCollection = "FkSecurityDivisions_SecurityCollection";			
			public const string FkSecurityDivisions = "FkSecurityDivisions";			
		}
 
		#endregion
		
		
	}
	
	#region Custom ICollection interface for Divisions 
 
	
	public interface IDivisionsCollection : ICollection
	{
		Divisions this[int index]{	get; set; }
		void Add(Divisions pDivisions);
		void Clear();
	}
	
	[Serializable]
	public class DivisionsCollection : IDivisionsCollection
	{
		private IList<Divisions> _arrayInternal;
 
		public DivisionsCollection()
		{
			_arrayInternal = new List<Divisions>();
		}
		
		public DivisionsCollection( IList<Divisions> pSource )
		{
			_arrayInternal = pSource;
			if(_arrayInternal == null)
			{
				_arrayInternal = new List<Divisions>();
			}
		}
 
		public Divisions this[int index]
		{
			get
			{
				return _arrayInternal[index];
			}
			set
			{
				_arrayInternal[index] = value;
			}
		}
 
		public int Count { get { return _arrayInternal.Count; } }
		public bool IsSynchronized { get { return false; } }
		public object SyncRoot { get { return _arrayInternal; } }
		public void CopyTo(Array array, int index){ _arrayInternal.CopyTo((Divisions[])array, index); }
		public IEnumerator GetEnumerator() { return _arrayInternal.GetEnumerator(); }
		public void Add(Divisions pDivisions) { _arrayInternal.Add(pDivisions); }
		public void Clear() { _arrayInternal.Clear(); }
		public IList<Divisions> GetList() { return _arrayInternal; }
	 
	
	#endregion
	
	}
}
======================================
Here is the XML mappings.
 
<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class name="IIIS.DataTransfer.Divisions,IIIS.DataTransfer" table="`DIVISIONS`" lazy="true">
    <id name="DivisionId" column="`DIVISION_ID`" type="int">
      <generator class="native" />
    </id>
    <property type="string" not-null="true" length="50" name="Name" column="`NAME`" />
    <bag name="FkMastersystemDivisions" inverse="true" lazy="true" cascade="all">
      <key column="`DIVISION_ID`" />
      <one-to-many class="IIIS.DataTransfer.Mastersystem,IIIS.DataTransfer" />
    </bag>
    <bag name="FkSecurityDivisions" inverse="true" lazy="true" cascade="all">
      <key column="`DIVISION_ID`" />
      <one-to-many class="IIIS.DataTransfer.Security,IIIS.DataTransfer" />
    </bag>
  </class>
</hibernate-mapping>
[+][-]08/08/09 01:32 PM, ID: 25051600Accepted Solution

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Zones: Programming for ASP.NET, Web Frameworks, MVC
Tags: NHibernate, MVC
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Solution Provided By: abel
Participating Experts: 1
Solution Grade: A
 
[+][-]08/10/09 10:11 AM, ID: 25061797Author Comment

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[+][-]08/10/09 11:39 AM, ID: 25062656Expert Comment

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