adds investment editing to admin

app/controllers/admin/budget_investments_controller.rb

@@ -1,6 +1,7 @@
 class Admin::BudgetInvestmentsController < Admin::BaseController
 
-  before_action :load_budget, only: [:index, :show]
+  before_action :load_budget
+  before_action :load_investment, only: [:show, :edit, :update]
 
   has_filters %w{valuation_open without_admin managed valuating valuation_finished all}, only: :index
 
@@ -9,13 +10,49 @@ class Admin::BudgetInvestmentsController < Admin::BaseController
   end
 
   def show
-    @investment = Budget::Investment.where(budget_id: @budget.id).find params[:id]
+  end
+
+  def edit
+    load_admins
+    load_valuators
+    load_tags
+  end
+
+   def update
+    if @investment.update(budget_investment_params)
+      redirect_to admin_budget_budget_investment_path(@budget, @investment, Budget::Investment.filter_params(params)),
+                  notice: t("flash.actions.update.budget_investment")
+    else
+      load_admins
+      load_valuators
+      load_tags
+      render :edit
+    end
   end
 
   private
 
+    def budget_investment_params
+      params.require(:budget_investment).permit(:title, :description, :external_url, :heading_id, :administrator_id, :tag_list, valuator_ids: [])
+    end
+
     def load_budget
       @budget = Budget.includes(:groups).find params[:budget_id]
     end
 
+    def load_investment
+      @investment = Budget::Investment.where(budget_id: @budget.id).find params[:id]
+    end
+
+    def load_admins
+      @admins = Administrator.includes(:user).all
+    end
+
+    def load_valuators
+      @valuators = Valuator.includes(:user).all.order("description ASC").order("users.email ASC")
+    end
+
+    def load_tags
+      @tags = ActsAsTaggableOn::Tag.budget_investment_tags
+    end
 end