http://blog.hde.co.jp/entry/2017/04/18/124050

design.go

package design

import (
	. "github.com/goadesign/goa/design"
	. "github.com/goadesign/goa/design/apidsl"
)

var _ = API("users", func() {
	Title("Users Management")
	Scheme("http")
	Host("localhost:8080")
})

var User = Type("user", func() {
	Description("")
	Attribute("email", String, "User's email address")
	Attribute("name", String, "User's name")
	Required("email", "name")
})

var UserMedia = MediaType("vnd.my.user", func() {
	Reference(User)
	Attributes(func() {
		Attribute("email")
		Attribute("name")
	})
	View("default", func() {
		Attribute("email")
		Attribute("name")
	})
})

var _ = Resource("Users", func() {
	BasePath("/users")
	Action("add", func() {
		Description("Register a new user")
		Routing(POST("/add"))
		Payload(User)
		Response(Created)
	})

	Action("list", func() {
		Description("List all users")
		Routing(GET("/list"))
		Response(OK, CollectionOf(UserMedia))
	})
})