Another attempt to fix the element does not exist (yet) problem.

Upon 404, we still define the object, with everything undefined, and register to events

Signed-off-by: Pierre Tardy <pierre.tardy@intel.com>

www/base/src/app/builders/build/build.controller.coffee

@@ -5,6 +5,8 @@ class Build extends Controller
 
         buildbotService.bindHierarchy($scope, $stateParams, ['builders', 'builds'])
         .then ([builder, build]) ->
+            if not build.number? and buildnumber > 1
+                $state.go('build', builder:builderid, build:buildnumber - 1)
             breadcrumb = [
                     caption: "Builders"
                     sref: "builders"
@@ -21,10 +23,14 @@ class Build extends Controller
                     sref: "build({build:#{buildnumber - 1}})"
 
             glBreadcrumbService.setBreadcrumb(breadcrumb)
-            buildbotService.one('builders', builderid).one('builds', buildnumber + 1).bind($scope, dest_key:"nextbuild").then ->
-                breadcrumb.push
-                    caption: '→'
-                    sref: "build({build:#{buildnumber + 1}})"
+            buildbotService.one('builders', builderid).one('builds', buildnumber + 1).bind($scope, dest_key:"nextbuild")
+
+            $scope.$watch 'nextbuild.number', (n, o) ->
+                if not o? and n?
+                    breadcrumb.push
+                        caption: '→'
+                        sref: "build({build:#{buildnumber + 1}})"
+                    glBreadcrumbService.setBreadcrumb(breadcrumb)
 
             buildbotService.one("buildslaves", build.buildslaveid).bind($scope)
             buildbotService.one("buildrequests", build.buildrequestid)
@@ -35,6 +41,3 @@ class Build extends Controller
                 recentStorage.addBuild
                     link: "#/builders/#{$scope.builder.builderid}/build/#{$scope.build.number}"
                     caption: "#{$scope.builder.name} / #{$scope.build.number}"
-        , ->
-            if buildnumber > 1
-                $state.go('build', builder:builderid, build:buildnumber - 1)

www/base/src/app/common/services/buildbot/buildbot.service.coffee

@@ -79,7 +79,7 @@ class BuildbotService extends Factory
                                         e[k] = v
                                     return
                             if not _.isArray(l)
-                                debugger
+                                throw Error("Collection value is not an array!")
                             value["id"] = value[idkey]
                             value["_raw_data"] = angular.copy(value)
                             # restangularize the object before putting it in
@@ -106,9 +106,20 @@ class BuildbotService extends Factory
                             elem.on("*", onUpdate).then (unsub) ->
                                 events.push(unsub)
                         return res
-                    , (res) ->
+                    , (res) ->  # got error
                         elem.value = null
-                        bound = false
+                        if res.status == 404
+                            # It does not exist yet. That might be the case later
+                            # we still 'define' it will all attributes 'undefined'
+                            # and register to update events
+                            # this allows controllers to watch until the value is defined
+                            elem.value = {}
+                            elem.on("*", onUpdate).then (unsub) ->
+                                events.push(unsub)
+                            return elem.value
+                        # if not 404, we say it is unbound, to maybe retry later, and reject the promise
+                        else
+                            bound = false
                         return $q.reject(res)
                 elem.value = p
                 return p