Relations between objects

[saromanov]

I added experimental feature is linking(or relations) between objects like in graph databases.
It can be seen lika a puppet if this feature is necessary.
Usage:

    obj1 := &TestObject{
        ID:  "my-object",
        Foo: "abc",
    }
    obj2 := &TestObject{
        ID:  "my-cool-thing",
        Foo: "xyz",
    }

    obj3 := &TestObject{
        ID:  "my-other-cool-thing",
        Foo: "xyz",
    }

    err := txn.Insert("main", obj1)
    if err != nil {
        t.Fatalf("err: %v", err)
    }
    err = txn.Insert("main", obj2)
    if err != nil {
        t.Fatalf("err: %v", err)
    }
    err = txn.Insert("main", obj3)
    if err != nil {
        t.Fatalf("err: %v", err)
    }

      //Connect between to ID by attribute "Work"
    err = txn.Connect(&Link{
        Table:      "main",
        Index:      "id",
        Arg1:       obj1.ID,
        Arg2:       obj2.ID,
        Attributes: []string{"Work"},
    })

    err = txn.Connect(&Link{
        Table:      "main",
        Index:      "id",
        Arg1:       obj1.ID,
        Arg2:       obj3.ID,
        Attributes: []string{"Work"},
    })

    if err != nil {
        t.Fatalf("err: %v", err)
    }

    // Get links by attribute "Work" and ID from first objects. 
    // It must return two objects(obj2.ID and obj3.ID)
    res, errlinks := txn.GetLinks("main", "id", "Work", obj1.ID)
    if errlinks != nil {
        t.Fatalf("err: %v", errlinks)
    }

[armon]

This is outside the scope of this library unfortunately. I would recommend forking the library if you need this functionality.