CascadeCore 1.0.2

Cascade

A system for in-memory datastore cascading and foreign key relations.

Currently only supports HashSet<T> when using datastore-features.

What can you do with Cascade?

By giving your POCO-types an [PrimaryKey]-attribute as well as [ForeignKey(typeof(Parent)] Cascade creates an easy to use relation between these objects when storing these objects in a IDataStore.

Example usage

public class Parent : ICascadable
{
    [PrimaryKey]
    public int Id { get; set; }
}

public class Child : ICascadable
{
    [PrimaryKey]
    public int Id { get; set; }
    
    [ForeignKey(typeof(Parent), delete: CascadeMode.Cascade)]
    public int ParentId { get; set; }
}

public class Store
{
    public HashSet<Parent> Parents { get; set; }
    
    public HashSet<Child> Children { get; set; }
}

...

static void Main()
{
    var store = new Store()
    {
        Parents = new HashSet<Parent>(),
        Children = new HashSet<Child>(),
    };
    
    store.Parents.Add(new Parent() { Id = 1 });
    store.Children.Add(new Child() { Id = 1, ParentId = 1 });
    store.Children.Add(new Child() { Id = 2, ParentId = 1 });
    store.Children.Add(new Child() { Id = 3, ParentId = 2 });
    store.Children.Add(new Child() { Id = 4, ParentId = 2 });
    
    CascadeCoreBuilder
        .Create()
        .WithStore(store)
        .Register();

    //Will cascade-delete all Children which references this primary key.
    CascadeCore.Instance.EventHandler.DeleteEntity(new Parent() { Id = 1 });
}

Future work

• SQL-generator for foreign keys.
• Fully support all types of cascading.
• More?