1 files changed, 24 insertions, 8 deletions

diff --git a/app/models/clusters/cluster.rb b/app/models/clusters/cluster.rb
index 222e4217e67..48d6c0daa0f 100644
--- a/app/models/clusters/cluster.rb
+++ b/app/models/clusters/cluster.rb
@@ -3,6 +3,7 @@
 module Clusters
   class Cluster < ActiveRecord::Base
     include Presentable
+    include Gitlab::Utils::StrongMemoize
 
     self.table_name = 'clusters'
 
@@ -11,7 +12,8 @@ module Clusters
       Applications::Ingress.application_name => Applications::Ingress,
       Applications::Prometheus.application_name => Applications::Prometheus,
       Applications::Runner.application_name => Applications::Runner,
-      Applications::Jupyter.application_name => Applications::Jupyter
+      Applications::Jupyter.application_name => Applications::Jupyter,
+      Applications::Knative.application_name => Applications::Knative
     }.freeze
     DEFAULT_ENVIRONMENT = '*'.freeze
 
@@ -19,13 +21,11 @@ module Clusters
 
     has_many :cluster_projects, class_name: 'Clusters::Project'
     has_many :projects, through: :cluster_projects, class_name: '::Project'
+    has_one :cluster_project, -> { order(id: :desc) }, class_name: 'Clusters::Project'
 
     has_many :cluster_groups, class_name: 'Clusters::Group'
     has_many :groups, through: :cluster_groups, class_name: '::Group'
 
-    has_one :cluster_group, -> { order(id: :desc) }, class_name: 'Clusters::Group'
-    has_one :group, through: :cluster_group, class_name: '::Group'
-
     # we force autosave to happen when we save `Cluster` model
     has_one :provider_gcp, class_name: 'Clusters::Providers::Gcp', autosave: true
 
@@ -36,6 +36,7 @@ module Clusters
     has_one :application_prometheus, class_name: 'Clusters::Applications::Prometheus'
     has_one :application_runner, class_name: 'Clusters::Applications::Runner'
     has_one :application_jupyter, class_name: 'Clusters::Applications::Jupyter'
+    has_one :application_knative, class_name: 'Clusters::Applications::Knative'
 
     has_many :kubernetes_namespaces
     has_one :kubernetes_namespace, -> { order(id: :desc) }, class_name: 'Clusters::KubernetesNamespace'
@@ -101,7 +102,8 @@ module Clusters
         application_ingress || build_application_ingress,
         application_prometheus || build_application_prometheus,
         application_runner || build_application_runner,
-        application_jupyter || build_application_jupyter
+        application_jupyter || build_application_jupyter,
+        application_knative || build_application_knative
       ]
     end
 
@@ -118,16 +120,30 @@ module Clusters
     end
 
     def first_project
-      return @first_project if defined?(@first_project)
-
-      @first_project = projects.first
+      strong_memoize(:first_project) do
+        projects.first
+      end
     end
     alias_method :project, :first_project
 
+    def first_group
+      strong_memoize(:first_group) do
+        groups.first
+      end
+    end
+    alias_method :group, :first_group
+
     def kubeclient
       platform_kubernetes.kubeclient if kubernetes?
     end
 
+    def find_or_initialize_kubernetes_namespace(cluster_project)
+      kubernetes_namespaces.find_or_initialize_by(
+        project: cluster_project.project,
+        cluster_project: cluster_project
+      )
+    end
+
     private
 
     def restrict_modification