Relations between buckets expressed with pointers ?

[tgirod]

Disclaimer: I'm throwing an idea here, no clue if it is possible / relevant... anyway:

When using a DB such as storm as a persitance layer, you inevitably find yourself in a situation where you want to have relations between your various structs.

I think it would be nice to be able to declare a field of a struct as foreign (given it is a valid storm struct), and when saving it storm would store that field in a separate bucket.

type Line struct {
	ID   int `storm:"increment"`
	Text string
}

type File struct {
	ID    int     `storm:"increment"`
	Lines []*Line `storm:"foreign"`
}

func main() {
	db, err := storm.Open("stuff.db")
	if err != nil {
		log.Fatal(err)
	}

	l1 := Line{Text: "first line"}
	l2 := Line{Text: "second line"}
	file := File{Lines: []*Line{&l1, &l2}}
	db.Save(&file)
	// would store l1 and l2 in a "Line" bucket

	var l3 Line
	db.One("ID", 1, &l3)
	// l3 == {1,"first line"}
	l3.Text = "modified first line"
	db.Save(&l3)

	var file2 File
	db.One("ID", 1, &file2)
	// file2 == {1, {"modified first line", "second line"}}
}

[tgirod]

Another suggestion along that line: if a field of a struct is itself a struct and has an ID field, then automatically store that separately, and store the type + ID when serializing the database.