Prepare for v3

mongox/base/ifacebased/id.go

@@ -0,0 +1,16 @@
+package ifacebased
+
+import (
+	"github.com/mainnika/mongox-go-driver/v2/mongox"
+	"github.com/modern-go/reflect2"
+)
+
+// GetID returns an _id from the source document
+func GetID(source mongox.InterfaceBased) (id interface{}, err error) {
+	id = source.GetID()
+	if !reflect2.IsNil(id) {
+		return id, nil
+	}
+
+	return nil, mongox.ErrUninitializedBase
+}