This is basic stuff with both database and ORM. Google is your friend. All I
can suggest is, where is the Teacher reference in Classes, and bidirectional
reference in Teacher? I don't know about auto mappings, as I usually do fluent
mapping, but this is a personal design decision. Beyond that I can quote you my
hourly rate.
On August 31, 2016 2:22:37 AM EDT, Ivan Ruiz de Eguilaz Sosoaga
<iruizegui...@gmail.com> wrote:
>
>>
>> Thank you very much for your patient and your answer.
>>
>
>I do not know If i have understud properly the concept of this: " Both
>sides of the now one to many need to be saved or updated first. "
>
>For instance, I have created a 2 new tables to do the tests. Teachers
>and
>Classes. They have only the attitubutes Id and Name. And I have added a
>
>relation one to many from teacher to classes.
>
>
>public class Classes : I_DTO
> {
> public virtual int Id { get; set; }
> public virtual string Name { get; set; }
>
>
> public Classes()
> {
> }
>}
>
>namespace ExCon_DAO_SQL.DTO.Wall
>{
> public class Teacher : I_DTO
> {
> public virtual int Id { get; set; }
> public virtual string Name { get; set; }
> public virtual IList<Classes> Classes { get; set; }
>
> public Teacher()
> {
> Classes = new List<Classes>();
> }
>
> }
>
>
>public class Teacher_Map : IAutoMappingOverride<Teacher>
> {
> public void Override(AutoMapping<Teacher> mapping)
> {
> mapping.HasMany(x => x.Classes).LazyLoad().
>
>Inverse().AsBag().ForeignKeyConstraintName("Teacher_Id").Cascade.AllDeleteOrphan();
>
> }
> }
>
>
>
>Ok, I have Save a Teacher with a clases in the list of clases. Both
>elements are saved in the database but the clases has in the database
>the
>element Teacher_Id as null
>
>is this behaivor normal?
>
>second test:
>
>public class Classes : I_DTO
> {
> public virtual int Id { get; set; }
> public virtual string Name { get; set; }
> public virtual Teacher teacher { get; set; }
>
>
> public Classes()
> {
> teacher = new Teacher();
> }
>}
>
> public class Classes_Map : IAutoMappingOverride<Classes>
> {
> public void Override(AutoMapping<Classes> mapping)
> {
> mapping.References(x => x.teacher).Column("Teacher_Id");
> }
> }
>
>Now I have been able to get the target but in this way:
>
>
> Teacher profe = new Teacher();
> profe.Name = "Peter";
>
> List<Classes> classes = new List<Classes>();
> Classes clase1 = new Classes();
> clase1.Name = "Class1";
> clase1.teacher = profe;
> classes.Add(clase1);
> profe.Classes = classes;
> DAO_Result resultado = SQL_DAO_Service.Add<Teacher>(profe);
>
>I have to add to the teacher the clasess, and each class have to has as
>
>well the reference of the teacher to se that in the save it is able to
>generate all properly
>
>is this behaviour correct?
>
>And last but not least
>
>If I have do and update of this teacher and and 2 clases with him, and
>after that I remove one of the element of the classes list, and I
>update
>the teacher, the system is not able to know that What I want is to
>delete
>the class from the database, so i will have to check on my own if the
>list
>of clases does not have and ald element to delete it...
>
>is this correct?
>
>thanks a lot!!!
>
>best regards...
>
>
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