Hi,
I am a newbie to both Hibernate and .NET. However, in the past few days I have spent so much time looking through forums to learn and I am getting there. With all the tutorials, I am still not able to get a simple parent child relationship work. I have attached all the necessary files and here are the C$ files:
Template.cs:
Code:
public class Template
{
private int id;
private string name;
// private DateTime modified;
private IList templateValues;
public Template()
{
}
public virtual int ID
{
set { id = value; }
get { return id; }
}
public virtual string TemplateName
{
set { name = value; }
get { return name; }
}
/**
public virtual DateTime Modified
{
set { modified = value; }
get { return modified; }
}
*/
public virtual IList TemplateValues
{
set { templateValues = value; }
get { return templateValues; }
}
public void AddTemplateValue(TemplateValue value)
{
if (TemplateValues.Contains(value))
return;
value.Parent = this;
TemplateValues.Add(value);
}
public void RemoveTemplateValue(TemplateValue value)
{
if (templateValues.Contains(value))
{
templateValues.Remove(value);
}
Db.Delete(value);
}
}
TemplateValue.cs
Code:
public class TemplateValue
{
private int id;
private string type;
private string value;
private Template parent;
public TemplateValue()
{
}
public TemplateValue(string type, string value)
{
this.type = type;
this.value = value;
}
public int ID
{
set { id = value; }
get { return id; }
}
public string Type
{
set { type = value; }
get { return type; }
}
public string Value
{
set { this.value = value; }
get { return this.value; }
}
public override bool Equals(Object obj)
{
if (obj == null) return false;
if (this.GetType() != obj.GetType()) return false;
// safe because of the GetType check
TemplateValue templateVal = (TemplateValue)obj;
if ((Type.Equals(templateVal.Type)) && (Value.Equals(templateVal.Value)) )return true;
return false;
}
public Template Parent
{
set { parent = value; }
get { return parent; }
}
public override int GetHashCode()
{
string stringRep = this.ToString();
return stringRep.GetHashCode();
}
}
Okay after having done all these mappings and code, I tried to test the database tables:
I was able to just add a new Parent row but however was not able to add child to existing parent table
Template template = (Template) Session.Load(typeof(Template), 5);
template.AddTemplateValue(new TemplateValue('location', 'chicago');
Session.Save(template).
The code above doesnt work and no exception happens.
Any help or suggestions please??
Thanks for your help in advance.
Javid
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Hibernate version:
NHibernate 1.0.4.0
Mapping documents:
Template.hbm.xml:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0"
namespace="HaynesPrototype" assembly="HaynesPrototype">
<class name="HaynesPrototype.Template" table="SCENARIO_TEMPLATES">
<id name="ID" column="ID" type="integer" length="50">
<generator class="identity" />
</id>
<property name="TemplateName" column="TEMPLATE_NAME" type="string" length="40" />
<bag name="TemplateValues" access="property" inverse="true" lazy="true" cascade="all-delete-orphan">
<key column="TEMPLATE_ID" />
<one-to-many class="TemplateValue" />
</bag>
</class>
</hibernate-mapping>
TemplateValue.hbm.xml:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0"
namespace="HaynesPrototype" assembly="HaynesPrototype">
<class name="HaynesPrototype.TemplateValue" table="SCENARIO_TEMPLATE_VALUES">
<composite-id>
<key-many-to-one name="Parent" class="Template">
<column name="TEMPLATE_ID" not-null="true"/>
</key-many-to-one>
<key-property name="Type" column="TYPE" type="string" />
<key-property name="Value" column="VALUE" type="string" />
</composite-id>
<many-to-one name="Parent" column="TEMPLATE_ID" class="Template" cascade="none" insert="false" update="false" not-null="true"/>
</class>
</hibernate-mapping>
Code between sessionFactory.openSession() and session.close():
Full stack trace of any exception that occurs:
Name and version of the database you are using:
MS SQL Server 2005
The generated SQL (show_sql=true):
Debug level Hibernate log excerpt:
Problems with Session and transaction handling?
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http://hibernate.org/42.html
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