Show assigned heading on investment show

app/components/budgets/investments/ballot_component.rb

@@ -1,12 +1,11 @@
 class Budgets::Investments::BallotComponent < ApplicationComponent
-  attr_reader :investment, :investment_ids, :ballot, :assigned_heading
+  attr_reader :investment, :investment_ids, :ballot
   delegate :current_user, :heading_link, :link_to_verify_account, to: :helpers
 
-  def initialize(investment:, investment_ids:, ballot:, assigned_heading:)
+  def initialize(investment:, investment_ids:, ballot:)
     @investment = investment
     @investment_ids = investment_ids
     @ballot = ballot
-    @assigned_heading = assigned_heading
   end
 
   private
@@ -42,6 +41,10 @@ class Budgets::Investments::BallotComponent < ApplicationComponent
               budget_ballot_path(budget))
     end
 
+    def assigned_heading
+      ballot.heading_for_group(investment.group)
+    end
+
     def cannot_vote_text
       if reason.present? && !voted?
         t("budgets.ballots.reasons_for_not_balloting.#{reason}",

app/views/budgets/investments/_ballot.html.erb

@@ -1,6 +1,5 @@
 <%= render Budgets::Investments::BallotComponent.new(
   investment: investment,
   investment_ids: investment_ids,
-  ballot: ballot,
-  assigned_heading: @assigned_heading
+  ballot: ballot
 ) %>

spec/components/budgets/investments/ballot_component_spec.rb

@@ -8,8 +8,7 @@ describe Budgets::Investments::BallotComponent do
       Budgets::Investments::BallotComponent.new(
         investment: investment,
         investment_ids: [],
-        ballot: Budget::Ballot.where(budget: budget, user: controller.current_user).first_or_create!,
-        assigned_heading: nil
+        ballot: Budget::Ballot.where(budget: budget, user: controller.current_user).first_or_create!
       )
     end
 

spec/system/budgets/investments_spec.rb

@@ -1389,6 +1389,22 @@ describe "Budget Investments" do
       expect(page).to have_content "€10,000"
     end
 
+    scenario "Show message if user already voted in other heading" do
+      group = create(:budget_group, budget: budget, name: "Global Group")
+      heading = create(:budget_heading, group: group, name: "Heading 1")
+      investment = create(:budget_investment, :selected, heading: heading)
+      heading2 = create(:budget_heading, group: group, name: "Heading 2")
+      investment2 = create(:budget_investment, :selected, heading: heading2)
+      user = create(:user, :level_two, ballot_lines: [investment])
+
+      login_as(user)
+      visit budget_investment_path(budget, investment2)
+
+      expect(page).to have_selector(".participation-not-allowed",
+                                    text: "You have already voted a different heading: Heading 1",
+                                    visible: :hidden)
+    end
+
     scenario "Sidebar in show should display vote text" do
       investment = create(:budget_investment, :selected, budget: budget)
       visit budget_investment_path(budget, investment)