fix: add param re-use example, fixes #94

examples/param-reuse/main.go

@@ -0,0 +1,64 @@
+// This example shows how to reuse a parameter in the path and body.
+//
+//	# Example call
+//	restish post :8888/reuse/leon
+package main
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+
+	"github.com/danielgtaylor/huma/v2"
+	"github.com/danielgtaylor/huma/v2/adapters/humachi"
+	"github.com/go-chi/chi/v5"
+)
+
+// Options for the CLI.
+type Options struct {
+	Port int `help:"Port to listen on" default:"8888"`
+}
+
+// ReusableParam is a reusable parameter that can go in the path or the body
+// of a request or response. The same validation applies to both places.
+type ReusableParam struct {
+	User string `json:"user" path:"user" maxLength:"10"`
+}
+
+type MyResponse struct {
+	Body struct {
+		// Example use as a body field.
+		ReusableParam
+	}
+}
+
+func main() {
+	// Create a CLI app which takes a port option.
+	cli := huma.NewCLI(func(hooks huma.Hooks, options *Options) {
+		// Create a new router & API
+		router := chi.NewMux()
+		api := humachi.New(router, huma.DefaultConfig("My API", "1.0.0"))
+
+		huma.Register(api, huma.Operation{
+			OperationID: "reuse",
+			Method:      http.MethodPost,
+			Path:        "/reuse/{user}",
+			Summary:     "Param re-use example",
+		}, func(ctx context.Context, input *struct {
+			// Example use as a path parameter.
+			ReusableParam
+		}) (*MyResponse, error) {
+			resp := &MyResponse{}
+			resp.Body.User = input.User
+			return resp, nil
+		})
+
+		// Tell the CLI how to start your router.
+		hooks.OnStart(func() {
+			http.ListenAndServe(fmt.Sprintf(":%d", options.Port), router)
+		})
+	})
+
+	// Run the CLI. When passed no commands, it starts the server.
+	cli.Run()
+}