Create empty Commits::UpdateService and wire it up

app/models/commit.rb

@@ -448,6 +448,10 @@ class Commit
     true
   end
 
+  def to_ability_name
+    model_name.singular
+  end
+
   def touch
     # no-op but needs to be defined since #persisted? is defined
   end

app/policies/commit_policy.rb

+class CommitPolicy < BasePolicy
+  delegate { @subject.project }
+end

app/services/commits/update_service.rb

+# frozen_string_literal: true
+
+module Commits
+  class UpdateService < BaseService
+    def execute(commit)
+      # TODO authorize user
+    end
+  end
+end

app/services/notes/quick_actions_service.rb

@@ -4,7 +4,8 @@ module Notes
   class QuickActionsService < BaseService
     UPDATE_SERVICES = {
       'Issue' => Issues::UpdateService,
-      'MergeRequest' => MergeRequests::UpdateService
+      'MergeRequest' => MergeRequests::UpdateService,
+      'Commit' => Commits::UpdateService
     }.freeze
 
     def self.noteable_update_service(note)

app/services/quick_actions/interpret_service.rb

@@ -60,7 +60,8 @@ module QuickActions
       "Closes this #{issuable.to_ability_name.humanize(capitalize: false)}."
     end
     condition do
-      issuable.persisted? &&
+      issuable.is_a?(Issuable) &&
+        issuable.persisted? &&
         issuable.open? &&
         current_user.can?(:"update_#{issuable.to_ability_name}", issuable)
     end
@@ -75,7 +76,8 @@ module QuickActions
       "Reopens this #{issuable.to_ability_name.humanize(capitalize: false)}."
     end
     condition do
-      issuable.persisted? &&
+      issuable.is_a?(Issuable) &&
+        issuable.persisted? &&
         issuable.closed? &&
         current_user.can?(:"update_#{issuable.to_ability_name}", issuable)
     end
@@ -149,7 +151,8 @@ module QuickActions
       issuable.allows_multiple_assignees? ? '@user1 @user2' : ''
     end
     condition do
-      issuable.persisted? &&
+      issuable.is_a?(Issuable) &&
+        issuable.persisted? &&
         issuable.assignees.any? &&
         current_user.can?(:"admin_#{issuable.to_ability_name}", project)
     end
@@ -188,7 +191,8 @@ module QuickActions
       "Removes #{issuable.milestone.to_reference(format: :name)} milestone."
     end
     condition do
-      issuable.persisted? &&
+      issuable.is_a?(Issuable) &&
+        issuable.persisted? &&
         issuable.milestone_id? &&
         current_user.can?(:"admin_#{issuable.to_ability_name}", project)
     end
@@ -231,7 +235,8 @@ module QuickActions
     end
     params '~label1 ~"label 2"'
     condition do
-      issuable.persisted? &&
+      issuable.is_a?(Issuable) &&
+        issuable.persisted? &&
         issuable.labels.any? &&
         current_user.can?(:"admin_#{issuable.to_ability_name}", project)
     end
@@ -257,7 +262,8 @@ module QuickActions
     end
     params '~label1 ~"label 2"'
     condition do
-      issuable.persisted? &&
+      issuable.is_a?(Issuable) &&
+        issuable.persisted? &&
         issuable.labels.any? &&
         current_user.can?(:"admin_#{issuable.to_ability_name}", project)
     end
@@ -317,7 +323,8 @@ module QuickActions
       "Subscribes to this #{issuable.to_ability_name.humanize(capitalize: false)}."
     end
     condition do
-      issuable.persisted? &&
+      issuable.is_a?(Issuable) &&
+        issuable.persisted? &&
         !issuable.subscribed?(current_user, project)
     end
     command :subscribe do
@@ -329,7 +336,8 @@ module QuickActions
       "Unsubscribes from this #{issuable.to_ability_name.humanize(capitalize: false)}."
     end
     condition do
-      issuable.persisted? &&
+      issuable.is_a?(Issuable) &&
+        issuable.persisted? &&
         issuable.subscribed?(current_user, project)
     end
     command :unsubscribe do