golang-uber-dig

You can register multiple implementations of the same type in Go dependency injection by assigning unique names to providers or exposing concrete values as interfaces using dig.As. This prevents type collisions and clarifies which implementation to inject.

The best way to collect multiple providers into a single slice for Golang routers is using value groups. Value groups aggregate many registered providers into one slice, streamlining collection for routers, handlers, or database migrations.

To keep Go constructors readable when they require many dependencies, use parameter objects with dig.In. This pattern bundles multiple dependencies into a single struct, making constructor signatures clean and maintainable.

Yes, you can validate your Golang dependency injection graph before running the application by executing a dry run. Dry runs validate the entire object graph to catch missing dependencies and configuration errors safely at startup.

You can override existing dependencies in a Go application without rewriting constructors by using decorators. Decorators intercept and modify values from existing providers, allowing behavior customization while preserving the original constructor logic.

Use scoped wiring for Go dependency injection when you need request- or module-level dependencies. Creating child scopes isolates specific object graphs from the root container, keeping state localized and preventing cross-request leaks.