Fixes #33525 - Add debs packages_restrict_latest

app/controllers/katello/api/v2/debs_controller.rb

@@ -39,6 +39,7 @@ def auto_complete_arch
     param :host_id, :number, :desc => N_("Host id to list applicable deb packages for")
     param :packages_restrict_applicable, :boolean, :desc => N_("Return deb packages that are applicable to one or more hosts (defaults to true if host_id is specified)")
     param :packages_restrict_upgradable, :boolean, :desc => N_("Return deb packages that are upgradable on one or more hosts")
+    param :packages_restrict_latest, :boolean, :desc => N_("Return only the latest version of each package")
     param :available_for, String, :desc => N_("Return deb packages that can be added to the specified object.  Only the value 'content_view_version' is supported.")
     param_group :search, ::Katello::Api::V2::ApiController
     def index

app/models/katello/deb.rb

@@ -98,7 +98,10 @@ def self.applicable_to_hosts(hosts)
     end
 
     def self.latest(_relation)
-      fail 'NotImplemented'
+      return relation.joins(
+        "LEFT JOIN (#{relation.to_sql}) AS katello_debs2 ON " \
+        'katello_debs.name=katello_debs2.name AND deb_version_cmp(katello_debs.version,katello_debs2.version) < 0'
+      ).where('katello_debs2.version IS NULL')
     end
   end
 end