Simple array mapping

Question

I use free Nhibernate to map a simple class
AND using Generation Schema to create this class in MySQL DB.
I cannot use IList <> for my properties (I map domain classes to multiple languages)
So I have to use simple arrays.

I want NHibernate to create a connection table between two classes.
These are domain classes:

    public class ClassOne
    {
        public virtual Guid Guid { get; set; }
        public virtual String Title { get; set; }
        public virtual ClassTwo[] Tags { get; set; }
    }

    public class ClassTwo
    {
        public virtual Guid Guid { get; set; }
        public virtual string Title { get; set; }
    }

And this is the map:

 public class ClassOneMap : ClassMap<ClassOneMap>
    {
        public ClassOneMap ()
        {
            Id(x => x.Guid).GeneratedBy.GuidComb();
            Map(x => x.Title);
            HasManyToMany(x => x.Tags)
                .Cascade.SaveUpdate());

        }
    }

    public class ClassTwoMap : ClassMap<ClassTwo>
    {
        public ClassTwoMap()
        {
            Id(x => x.Guid).GeneratedBy.GuidComb();
            Map(x => x.Title);
        }
    }

The circuit generates a lot! It has tables ClassOne, ClassTwo and ClassTwoToClassOne But when I try to save an instance of the ClassOne class, I have an Invalid Cast exception. This is solved by changing the arrays to IList, but I cannot do this.

- , Fluent ?

A'lot!

Answer 1

, , .

, :

 public class ClassOne : Entity
    {
        public virtual string Title { get; set; }

        public virtual ClassTwo[] Tags { get; set; }

     }

    public class ClassTwo : Entity
    {
        public virtual string Title { get; set; }
    }

Id, .

: FluentNhibernate , HasManyToMany

public class ClassOneMappingOverride : IAutoMappingOverride<ClassOne>
    {
        public void Override(AutoMapping<ClassOne> mapping)
        {
            mapping.HasManyToMany(x => x.Tags).AsArray(x => x.Id).ParentKeyColumn("classOneId")
                .ChildKeyColumn("classTwoId")
                .Table("ClassOneLinkClassTwo")
                .Cascade.SaveUpdate();
        }
    }

: ParentKey, ChildKey Table, .

unit test, , :

 public class ClassOneDataPart : DataPartBase, IDataPart
{
    public void AddToDatabase()
    {
        var classOne = new ClassOne { Title = "classOne" };

        var classTwo1 = new ClassTwo { Title = "class21" };
        var classTwo2 = new ClassTwo { Title = "class22" };

        var tags = new[] { classTwo1, classTwo2 };

        classOne.Tags = tags;

        this.SaveData(classOne);
        this.SaveData(classTwo1);
        this.SaveData(classTwo2);
    }
}

:

, Ion

Answer 2

. AddTag RemoveTag .

public class ClassOne
{
    private IList<ClassTwo> _tags;

    public virtual Guid Guid { get; set; }
    public virtual String Title { get; set; }
    public virtual ClassTwo[] Tags
    {
        // possibly expose as method to hint that the array is re-built on every call
        get { return _tags.ToArray(); }
    }
}

public class ClassOneMap : ClassMap<ClassOne>
{
    public ClassOneMap ()
    {
        Id(x => x.Guid).GeneratedBy.GuidComb();
        Map(x => x.Title);
        HasManyToMany(x => x.Tags).Access.CamelCaseField(Prefix.Underscore)
            .Cascade.SaveUpdate());

    }
}

Answer 3

Try using .AsArray (x => x.Id)