KeyBuilder Advanced Usage

Explore advanced scenarios and customization options for KeyBuilder.

Custom KeyVars Interface

Implement the KeyVars() map[string]any method on your struct to control variable extraction:

type Session struct {
    UserID string
    SessionID string
}
func (s Session) KeyVars() map[string]any {
    return map[string]any{
        "user": s.UserID,
        "session": s.SessionID,
    }
}
builder := key.Template("session:{user}:{session}")
key, err := builder.Build(ctx, Session{UserID: "bob", SessionID: "xyz"})

See the DSL Details page for syntax and input types.