Do not focus custom fields in the create child dialog

The field to focus is the subject field.

Also test that all custom fields are displayed in the create
child dialog.

app/forms/custom_fields/custom_field_rendering.rb

@@ -84,9 +84,7 @@ def single_value_custom_field_input(builder, custom_field)
       CustomFields::Inputs::Int.new(builder, **form_args)
     when "float"
       CustomFields::Inputs::Float.new(builder, **form_args)
-    when "hierarchy"
-      CustomFields::Inputs::SingleSelectList.new(builder, **form_args)
-    when "list"
+    when "hierarchy", "list"
       CustomFields::Inputs::SingleSelectList.new(builder, **form_args)
     when "date"
       CustomFields::Inputs::Date.new(builder, **form_args)
@@ -103,9 +101,7 @@ def multi_value_custom_field_input(builder, custom_field)
     form_args = form_arguments(custom_field)
 
     case custom_field.field_format
-    when "hierarchy"
-      CustomFields::Inputs::MultiSelectList.new(builder, **form_args)
-    when "list"
+    when "hierarchy", "list"
       CustomFields::Inputs::MultiSelectList.new(builder, **form_args)
     when "user"
       CustomFields::Inputs::MultiUserSelectList.new(builder, **form_args)

app/forms/custom_fields/inputs/base/autocomplete/multi_value_input.rb

@@ -40,6 +40,7 @@ def autocomplete_options
     {
       multiple: true,
       decorated: decorated?,
+      focusDirectly: false,
       append_to:
     }
   end

app/forms/custom_fields/inputs/base/autocomplete/single_value_input.rb

@@ -40,6 +40,7 @@ def autocomplete_options
     {
       multiple: false,
       decorated: decorated?,
+      focusDirectly: false,
       append_to:
     }
   end

spec/factories/custom_field_factory.rb

@@ -167,6 +167,12 @@
 
     trait :hierarchy do
       field_format { "hierarchy" }
+      hierarchy_root factory: :hierarchy_item
+    end
+
+    trait :multi_hierarchy do
+      hierarchy
+      multi_value
     end
 
     factory :project_custom_field, class: "ProjectCustomField" do

spec/features/work_packages/tabs/relations_children_spec.rb

@@ -113,4 +113,48 @@
       relations_tab.expect_no_new_relation_type("New child")
     end
   end
+
+  context "when all possible custom fields are there" do
+    let!(:user) { create(:admin) }
+
+    before do
+      # Introspect FactoryBot to find all traits used to create work package custom fields
+      traits = FactoryBot.factories[:wp_custom_field].defined_traits
+      traits = traits.reject { |t| t.name == "multi_value" }
+      traits = traits.map { |t| t.name.to_sym }
+
+      traits.each do |trait|
+        [true, false].each do |required| # rubocop:disable Performance/CollectionLiteralInLoop
+          cf = create(:wp_custom_field,
+                      trait,
+                      is_required: required)
+          project.types.first.custom_fields << cf
+          project.work_package_custom_fields << cf
+        end
+      end
+    end
+
+    it "displays a field for each required custom field" do
+      wp_page.visit_tab!("relations")
+      relations_tab.select_relation_type "New child"
+
+      project.work_package_custom_fields.each do |cf|
+        create_dialog.in_dialog do
+          if cf.required?
+            # `visible: :all` is needed as text custom field use a hidden textarea internally
+            expect(page).to have_field cf.name, visible: :all
+          else
+            expect(page).to have_no_field cf.name
+          end
+        end
+      end
+    end
+
+    it "focuses the subject input field" do
+      wp_page.visit_tab!("relations")
+      relations_tab.select_relation_type "New child"
+
+      create_dialog.expect_subject_field_focused
+    end
+  end
 end

spec/support/components/work_packages/create_dialog.rb

@@ -64,6 +64,14 @@ def expect_subject(value)
         end
       end
 
+      def expect_subject_field_focused
+        in_dialog do
+          subject_field = page.find_field("Subject")
+          subject_field_id_selector = "##{subject_field[:id]}"
+          expect(page).to have_focus_on(subject_field_id_selector)
+        end
+      end
+
       def set_description(value)
         @description.set_markdown(value)
       end