New on the blog: Dependency Injection in Wheels 4.0 — services.cfm, scopes, and auto-wiring. <https://blog.wheels.dev/posts/dependency-injection-services-scopes/> What it covers: • Registering services in

config/services.cfm

with

injector()

+ the fluent

di.map("x").to("...").asSingleton()

chain (and yes — you create that file yourself; the scaffold ships none) • The three lifetimes — transient (the DEFAULT, the one that bites),

.asSingleton()

,

.asRequestScoped()

— and when to reach for each • Resolving anywhere with

service("name")

(it throws

Wheels.DI.ServiceNotFound

, it doesn't return null) • Controller

inject("a, b")

in config() → use as

this.a

in actions, resolved per-request • Constructor auto-wiring:

init()

param names that match registered mappings get filled in for free • Sharp edges: singletons cached by mapping NAME not component path; auto-wiring only fires with empty initArguments;

mapInstance()

vs

map()

in plugins A user-facing how-to — not the wheelsdi internals story (that's the earlier "From WireBox to wheelsdi" post).