// Resource implements the resource definition DSL. There is one resource definition per resource
// exposed by the API. The resource DSL allows setting the resource default media type. This media
// type is used to render the response body of actions that return the OK response (unless the
// action overrides the default). The default media type also sets the properties of the request
// payload attributes with the same name. See DefaultMedia.
//
// The resource DSL also allows listing the supported resource collection and resource collection
// item actions. Each action corresponds to a specific API endpoint. See Action.
//
// The resource DSL can also specify a parent resource. Parent resources have two effects.
// First, they set the prefix of all resource action paths to the parent resource href. Note that
// actions can override the path using an absolute path (that is a path starting with "//").
// Second, goa uses the parent resource href coupled with the resource BasePath if any to build
// hrefs to the resource collection or resource collection items. By default goa uses the show
// action if present to compute a resource href (basically concatenating the parent resource href
// with the base path and show action path). The resource definition may specify a canonical action
// via CanonicalActionName to override that default. Here is an example of a resource definition:
//
// Resource("bottle", func() {
// Description("A wine bottle") // Resource description
// DefaultMedia(BottleMedia) // Resource default media type
// BasePath("/bottles") // Common resource action path prefix if not ""
// Parent("account") // Name of parent resource if any
// CanonicalActionName("get") // Name of action that returns canonical representation if not "show"
// UseTrait("Authenticated") // Included trait if any, can appear more than once
// APIVersion("v1") // API version exposing this resource, can appear more than once.
//
// Action("show", func() { // Action definition, can appear more than once
// // ... Action DSL
// })
// })
func Resource(name string, dsl func()) *design.ResourceDefinition {
if design.Design.Resources == nil {
design.Design.Resources = make(map[string]*design.ResourceDefinition)
}
var resource *design.ResourceDefinition
if topLevelDefinition(true) {
if _, ok := design.Design.Resources[name]; ok {
ReportError("resource %#v is defined twice", name)
return nil
}
resource = design.NewResourceDefinition(name, dsl)
design.Design.Resources[name] = resource
}
return resource
}
// Resource implements the resource definition dsl. There is one resource definition per resource
// exposed by the API. The resource dsl allows setting the resource default media type. This media
// type is used to render the response body of actions that return the OK response (unless the
// action overrides the default). The default media type also sets the properties of the request
// payload attributes with the same name. See DefaultMedia.
//
// The resource dsl also allows listing the supported resource collection and resource collection
// item actions. Each action corresponds to a specific API endpoint. See Action.
//
// The resource dsl can also specify a parent resource. Parent resources have two effects.
// First, they set the prefix of all resource action paths to the parent resource href. Note that
// actions can override the path using an absolute path (that is a path starting with "//").
// Second, goa uses the parent resource href coupled with the resource BasePath if any to build
// hrefs to the resource collection or resource collection items. By default goa uses the show
// action if present to compute a resource href (basically concatenating the parent resource href
// with the base path and show action path). The resource definition may specify a canonical action
// via CanonicalActionName to override that default. Here is an example of a resource definition:
//
// Resource("bottle", func() {
// Description("A wine bottle") // Resource description
// DefaultMedia(BottleMedia) // Resource default media type
// BasePath("/bottles") // Common resource action path prefix if not ""
// Parent("account") // Name of parent resource if any
// CanonicalActionName("get") // Name of action that returns canonical representation if not "show"
// UseTrait("Authenticated") // Included trait if any, can appear more than once
//
// Origin("http://swagger.goa.design", func() { // Define CORS policy, may be prefixed with "*" wildcard
// Headers("X-Shared-Secret") // One or more authorized headers, use "*" to authorize all
// Methods("GET", "POST") // One or more authorized HTTP methods
// Expose("X-Time") // One or more headers exposed to clients
// MaxAge(600) // How long to cache a preflight request response
// Credentials() // Sets Access-Control-Allow-Credentials header
// })
//
// Response(Unauthorized, ErrorMedia) // Common responses to all actions
// Response(BadRequest, ErrorMedia)
//
// Action("show", func() { // Action definition, can appear more than once
// // ... Action dsl
// })
// })
func Resource(name string, dsl func()) *design.ResourceDefinition {
if design.Design.Resources == nil {
design.Design.Resources = make(map[string]*design.ResourceDefinition)
}
if !dslengine.IsTopLevelDefinition() {
dslengine.IncompatibleDSL()
return nil
}
if _, ok := design.Design.Resources[name]; ok {
dslengine.ReportError("resource %#v is defined twice", name)
return nil
}
resource := design.NewResourceDefinition(name, dsl)
design.Design.Resources[name] = resource
return resource
}