Do you know anything about Domain Driven Design?

Domain Driven Design (DDD) is an approach to software development that focuses on a deep understanding of the subject area and building a model that reflects business logic. In DDD, key concepts include:

• Domain Model — an abstraction of business logic.
• Ubiquitous Language — a common language between developers and domain experts.
• Aggregates — groups of related objects considered as a single unit for changes.
• Repositories — an abstraction for data access to aggregates.
• Domain Services — operations that do not belong to a specific object.

In the context of Go, DDD is often used to clearly separate layers (e.g., domain, application, infrastructure), which helps maintain a clean architecture and facilitates testing. An example of a simple aggregate in Go:

// User — aggregate in the domain model
type User struct {
    ID   string
    Name string
}

func (u *User) ChangeName(newName string) {
    // business logic for changing the name
    u.Name = newName
}

DDD helps create flexible and scalable systems focused on business requirements.