Fixes ProvisionWorkflow#available_vlans_and_hosts

app/models/manageiq/providers/vmware/infra_manager/provision_workflow.rb

@@ -134,13 +134,15 @@ def available_vlans_and_hosts(options = {})
     # dvportgroups key-value transformed
     if options[:dvs]
       dvlans      = Hash.new { |h, k| h[k] = [] }
-      shared_lans = Lan.distinct.select(:id, :switch_id, :name)
-                       .includes(:switch)
-                       .joins(:switch => :host_switches)
-                       .where(:host_switches => {:host_id => hosts.map(&:id)})
-                       .merge(Switch.shareable)
-
-      shared_lans.each { |l| dvlans[l.name] << l.switch.name }
+      unless hosts.nil?
+        shared_lans = Lan.distinct.select(:id, :switch_id, :name)
+                         .includes(:switch)
+                         .joins(:switch => :host_switches)
+                         .where(:host_switches => {:host_id => hosts.map(&:id)})
+                         .merge(Switch.shareable)
+
+        shared_lans.each { |l| dvlans[l.name] << l.switch.name }
+      end
       dvlans.each do |l, v|
         vlans["dvs_#{l}"] = "#{l} (#{v.sort.uniq.join('/')})"
       end

spec/models/manageiq/providers/vmware/infra_manager/provision_workflow_spec.rb

@@ -28,6 +28,25 @@
     end
   end
 
+  describe "#init_from_dialog" do
+    let(:user)     { FactoryGirl.create(:user_with_email, :role => 'super_administrator', :password => 'x') }
+    let(:ems)      { FactoryGirl.create(:ems_vmware_with_authentication) }
+    let(:template) { FactoryGirl.create(:template_vmware, :ext_management_system => ems) }
+    let(:req)      { FactoryGirl.create(:miq_provision_request, :requester => user, :source => template) }
+    let(:options)  { req.get_options.merge(:org_controller=>"vm") }
+
+    subject        { req.workflow(options) }
+
+    before do
+      EvmSpecHelper.create_guid_miq_server_zone
+      MiqDialog.seed
+    end
+
+    it "does not raise an error" do
+      expect { subject.init_from_dialog(options) }.to_not raise_error
+    end
+  end
+
   describe "#make_request" do
     let(:alt_user) { FactoryGirl.create(:user_with_group) }
     it "creates and update a request" do