Fix saving network manager in belongsto filter

app/models/ext_management_system.rb

@@ -339,6 +339,15 @@ def self.provision_workflow_class
     self::ProvisionWorkflow
   end
 
+  BELONGS_TO_DESCENDANTS_CLASSES_BY_NAME = {
+    'Network Manager' => 'ManageIQ::Providers::NetworkManager'
+  }.freeze
+
+  def self.belongsto_descendant_class(name)
+    return unless (descendant = BELONGS_TO_DESCENDANTS_CLASSES_BY_NAME.keys.detect { |x| name.end_with?(x) })
+    BELONGS_TO_DESCENDANTS_CLASSES_BY_NAME[descendant]
+  end
+
   # UI methods for determining availability of fields
   def supports_port?
     false

app/models/manageiq/providers/network_manager.rb

@@ -1,6 +1,9 @@
 module ManageIQ::Providers
   class NetworkManager < BaseManager
     include SupportsFeatureMixin
+
+    PROVIDER_NAME = "Network Manager".freeze
+
     class << model_name
       define_method(:route_key) { "ems_networks" }
       define_method(:singular_route_key) { "ems_network" }
@@ -88,7 +91,12 @@ def self.supported_types_and_descriptions_hash
     end
 
     def name
-      "#{parent_manager.try(:name)} Network Manager"
+      "#{parent_manager.try(:name)} #{PROVIDER_NAME}"
+    end
+
+    def self.find_object_for_belongs_to_filter(name)
+      name.gsub!(" #{self::PROVIDER_NAME}", "")
+      includes(:parent_manager).find_by(:parent_managers_ext_management_systems => {:name => name})
     end
   end
 

app/models/miq_filter.rb

@@ -1,17 +1,48 @@
 module MiqFilter
+  ALLOWED_DESCENDANT_CLASSES_FROM_MODEL = %w[ExtManagementSystem].freeze
+
   def self.belongsto2object(tag)
     belongsto2object_list(tag).last
   end
 
+  def self.find_descendant_class_by(klass, name)
+    if ALLOWED_DESCENDANT_CLASSES_FROM_MODEL.include?(klass.to_s) && (descendant_class = klass.try(:belongsto_descendant_class, name))
+      return descendant_class.constantize
+    else
+      _log.warn("Unable to find descendant class for belongsto filter: #{klass}/#{name}")
+    end
+
+    nil
+  end
+
+  def self.find_object_by_special_class(klass, name)
+    if (descendant_class = find_descendant_class_by(klass, name)) && descendant_class.respond_to?(:find_object_for_belongs_to_filter)
+      return descendant_class.find_object_for_belongs_to_filter(name)
+    else
+      _log.warn("#{klass} is not supported for loading objects of descendants classes.(belongsto filter: #{klass}/#{name}, descendant class: #{descendant_class}")
+    end
+
+    nil
+  end
+
+  def self.find_object_by_name(klass, name)
+    klass = klass.constantize
+    object = klass.find_by(:name => name)
+    if object.nil?
+      find_object_by_special_class(klass, name)
+    else
+      object
+    end
+  end
+
   def self.belongsto2object_list(tag)
     # /belongsto/ExtManagementSystem|<name>/EmsCluster|<name>/EmsFolder|<name>
     raise _("invalid tag: %{tag}") % {:tag => tag} unless tag.starts_with?("/belongsto/ExtManagementSystem")
     parts = tag.split("/")[2..-1]
 
     # root object
     klass, name = parts.shift.split("|")
-    klass = klass.constantize
-    obj = klass.find_by(:name => name)
+    obj = find_object_by_name(klass, name)
 
     if obj.nil?
       _log.warn("lookup for klass=#{klass.to_s.inspect} with name=#{name.inspect} failed in tag=#{tag.inspect}")

spec/models/miq_filter_spec.rb

@@ -48,5 +48,15 @@ def belongsto2object_list(*args)
       host_object_path = [ems, datacenter, mtc, host_folder, host_1]
       expect(belongsto2object_list(mtc_folder_path_with_host_1)).to match_array(host_object_path)
     end
+
+    context "with network manager" do
+      let(:ems_openstack) { FactoryBot.create(:ems_openstack) }
+      let(:network_manager_folder_path) { "/belongsto/ExtManagementSystem|#{ems_openstack.name} Network Manager" }
+
+      it "converts path with network manager" do
+        ems_openstack.update_attributes(:name => "XXX")
+        expect(belongsto2object_list(network_manager_folder_path)).to match_array([ems_openstack.network_manager])
+      end
+    end
   end
 end