Use find instead of find_by_id

Better raise a 404 HTML NotFound exception than any other unexpected error.

app/controllers/admin/budget_groups_controller.rb

@@ -46,11 +46,11 @@ class Admin::BudgetGroupsController < Admin::BaseController
   private
 
     def load_budget
-      @budget = Budget.includes(:groups).find(params[:budget_id])
+      @budget = Budget.find_by_slug_or_id! params[:budget_id]
     end
 
     def load_group
-      @group = @budget.groups.find(params[:id])
+      @group = @budget.groups.find_by_slug_or_id! params[:id]
     end
 
     def groups_index

app/controllers/admin/budget_headings_controller.rb

@@ -47,15 +47,15 @@ class Admin::BudgetHeadingsController < Admin::BaseController
   private
 
     def load_budget
-      @budget = Budget.includes(:groups).find(params[:budget_id])
+      @budget = Budget.find_by_slug_or_id! params[:budget_id]
     end
 
     def load_group
-      @group = @budget.groups.find(params[:group_id])
+      @group = @budget.groups.find_by_slug_or_id! params[:group_id]
     end
 
     def load_heading
-      @heading = @group.headings.find(params[:id])
+      @heading = @group.headings.find_by_slug_or_id! params[:id]
     end
 
     def headings_index

app/controllers/admin/budget_investments_controller.rb

@@ -87,7 +87,7 @@ class Admin::BudgetInvestmentsController < Admin::BaseController
     end
 
     def load_budget
-      @budget = Budget.includes(:groups).find(params[:budget_id])
+      @budget = Budget.find_by_slug_or_id! params[:budget_id]
     end
 
     def load_investment

app/controllers/admin/budgets_controller.rb

@@ -6,7 +6,7 @@ class Admin::BudgetsController < Admin::BaseController
 
   has_filters %w{open finished}, only: :index
 
-  before_action :load_budget
+  before_action :load_budget, except: [:index, :new, :create]
   load_and_authorize_resource
 
   def index
@@ -68,7 +68,7 @@ class Admin::BudgetsController < Admin::BaseController
     end
 
     def load_budget
-      @budget = Budget.find_by(slug: params[:id]) || Budget.find_by(id: params[:id])
+      @budget = Budget.find_by_slug_or_id! params[:id]
     end
 
 end

app/controllers/budgets/ballot/lines_controller.rb

@@ -37,7 +37,7 @@ module Budgets
         end
 
         def load_budget
-          @budget = Budget.find_by(slug: params[:budget_id]) || Budget.find_by(id: params[:budget_id])
+          @budget = Budget.find_by_slug_or_id! params[:budget_id]
         end
 
         def load_ballot

app/controllers/budgets/ballots_controller.rb

@@ -15,7 +15,7 @@ module Budgets
     private
 
       def load_budget
-        @budget = Budget.find_by(slug: params[:budget_id]) || Budget.find_by(id: params[:budget_id])
+        @budget = Budget.find_by_slug_or_id! params[:budget_id]
       end
 
       def load_ballot

app/controllers/budgets/groups_controller.rb

@@ -14,11 +14,11 @@ module Budgets
     private
 
       def load_budget
-        @budget = Budget.find_by(slug: params[:budget_id]) || Budget.find_by(id: params[:budget_id])
+        @budget = Budget.find_by_slug_or_id! params[:budget_id]
       end
 
       def load_group
-        @group = Budget::Group.find_by(slug: params[:id]) || Budget.find_by(id: params[:id])
+        @group = @budget.groups.find_by_slug_or_id! params[:id]
       end
   end
 end

app/controllers/budgets/investments_controller.rb

@@ -137,7 +137,7 @@ module Budgets
 
       def load_heading
         if params[:heading_id].present?
-          @heading = @budget.headings.find_by(slug: params[:heading_id]) || @budget.headings.find_by(id: params[:heading_id])
+          @heading = @budget.headings.find_by_slug_or_id! params[:heading_id]
           @assigned_heading = @ballot.try(:heading_for_group, @heading.try(:group))
           load_map
         end
@@ -156,7 +156,7 @@ module Budgets
       end
 
       def load_budget
-        @budget = Budget.find_by(slug: params[:budget_id]) || Budget.find_by(id: params[:budget_id])
+        @budget = Budget.find_by_slug_or_id! params[:budget_id]
       end
 
       def set_view

app/controllers/budgets/results_controller.rb

@@ -14,16 +14,13 @@ module Budgets
     private
 
       def load_budget
-        @budget = Budget.find_by(slug: params[:budget_id])
-        @budget ||= Budget.find_by(id: params[:budget_id])
-        @budget ||= Budget.first
+        @budget = Budget.find_by_slug_or_id(params[:budget_id]) || Budget.first
       end
 
       def load_heading
-        @heading = if params[:heading_id].present?
-                     @budget.headings.find(params[:heading_id])
-                   else
-                     @budget.headings.first
+        if @budget.present?
+          headings = @budget.headings
+          @heading = headings.find_by_slug_or_id(params[:heading_id]) || headings.first
         end
       end
 

app/controllers/budgets/stats_controller.rb

@@ -13,7 +13,7 @@ module Budgets
     private
 
       def load_budget
-        @budget = Budget.find_by(slug: params[:budget_id]) || Budget.find_by(id: params[:budget_id])
+        @budget = Budget.find_by_slug_or_id! params[:budget_id]
       end
 
   end

app/controllers/budgets_controller.rb

@@ -23,7 +23,7 @@ class BudgetsController < ApplicationController
   private
 
     def load_budget
-      @budget = Budget.find_by(slug: params[:id]) || Budget.find_by(id: params[:id])
+      @budget = Budget.find_by_slug_or_id! params[:id]
     end
 
 end

app/controllers/management/budgets/investments_controller.rb

@@ -62,7 +62,7 @@ class Management::Budgets::InvestmentsController < Management::BaseController
     end
 
     def load_budget
-      @budget = Budget.find_by(slug: params[:budget_id]) || Budget.find_by(id: params[:budget_id])
+      @budget = Budget.find_by_slug_or_id! params[:budget_id]
     end
 
     def load_categories

app/controllers/valuation/budget_investments_controller.rb

@@ -65,7 +65,7 @@ class Valuation::BudgetInvestmentsController < Valuation::BaseController
     end
 
     def load_budget
-      @budget = Budget.find_by(slug: params[:budget_id]) || Budget.find_by(id: params[:budget_id])
+      @budget = Budget.find_by_slug_or_id! params[:budget_id]
     end
 
     def load_investment

app/models/budget/investment.rb

@@ -113,7 +113,7 @@ class Budget
     end
 
     def self.scoped_filter(params, current_filter)
-      budget  = Budget.find_by(slug: params[:budget_id]) || Budget.find_by(id: params[:budget_id])
+      budget  = Budget.find_by_slug_or_id params[:budget_id]
       results = Investment.by_budget(budget)
 
       results = results.where("cached_votes_up + physical_votes >= ?",

spec/controllers/budgets/ballots/lines_controller_spec.rb

@@ -0,0 +1,25 @@
+require "rails_helper"
+
+describe Budgets::Ballot::LinesController do
+
+  describe "#load_budget" do
+
+    it "raises an error if budget slug is not found" do
+      controller.params[:budget_id] = "wrong_budget"
+
+      expect do
+        controller.send(:load_budget)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    it "raises an error if budget id is not found" do
+      controller.params[:budget_id] = 0
+
+      expect do
+        controller.send(:load_budget)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+  end
+
+end

spec/features/admin/budget_groups_spec.rb

@@ -32,6 +32,43 @@ describe "Admin budget groups" do
 
   end
 
+  context "Load" do
+
+    let!(:budget) { create(:budget, slug: "budget_slug") }
+    let!(:group)  { create(:budget_group, slug: "group_slug", budget: budget) }
+
+    scenario "finds budget and group by slug" do
+      visit edit_admin_budget_group_path("budget_slug", "group_slug")
+      expect(page).to have_content(budget.name)
+      expect(page).to have_field "Group name", with: group.name
+    end
+
+    scenario "raises an error if budget slug is not found" do
+      expect do
+        visit edit_admin_budget_group_path("wrong_budget", group)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if budget id is not found" do
+      expect do
+        visit edit_admin_budget_group_path(0, group)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if group slug is not found" do
+      expect do
+        visit edit_admin_budget_group_path(budget, "wrong_group")
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if group id is not found" do
+      expect do
+        visit edit_admin_budget_group_path(budget, 0)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+  end
+
   context "Index" do
 
     scenario "Displaying no groups for budget" do

spec/features/admin/budget_headings_spec.rb

@@ -33,6 +33,56 @@ describe "Admin budget headings" do
 
   end
 
+  context "Load" do
+
+    let!(:budget)  { create(:budget, slug: "budget_slug") }
+    let!(:group)   { create(:budget_group, slug: "group_slug", budget: budget) }
+    let!(:heading) { create(:budget_heading, slug: "heading_slug", group: group) }
+
+    scenario "finds budget, group and heading by slug" do
+      visit edit_admin_budget_group_heading_path("budget_slug", "group_slug", "heading_slug")
+      expect(page).to have_content(budget.name)
+      expect(page).to have_content(group.name)
+      expect(page).to have_field "Heading name", with: heading.name
+    end
+
+    scenario "raises an error if budget slug is not found" do
+      expect do
+        visit edit_admin_budget_group_heading_path("wrong_budget", group, heading)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if budget id is not found" do
+      expect do
+        visit edit_admin_budget_group_heading_path(0, group, heading)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if group slug is not found" do
+      expect do
+        visit edit_admin_budget_group_heading_path(budget, "wrong_group", heading)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if group id is not found" do
+      expect do
+        visit edit_admin_budget_group_heading_path(budget, 0, heading)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if heading slug is not found" do
+      expect do
+        visit edit_admin_budget_group_heading_path(budget, group, "wrong_heading")
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if heading id is not found" do
+      expect do
+        visit edit_admin_budget_group_heading_path(budget, group, 0)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+  end
+
   context "Index" do
 
     scenario "Displaying no headings for group" do

spec/features/admin/budget_investments_spec.rb

@@ -32,6 +32,34 @@ describe "Admin budget investments" do
 
   end
 
+  context "Load" do
+
+    let(:group)      { create(:budget_group, budget: budget) }
+    let(:heading)    { create(:budget_heading, group: group) }
+    let!(:investment) { create(:budget_investment, heading: heading) }
+
+    before { budget.update(slug: "budget_slug") }
+
+    scenario "finds investments using budget slug" do
+      visit admin_budget_budget_investments_path("budget_slug")
+
+      expect(page).to have_link investment.title
+    end
+
+    scenario "raises an error if budget slug is not found" do
+      expect do
+        visit admin_budget_budget_investments_path("wrong_budget", investment)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if budget id is not found" do
+      expect do
+        visit admin_budget_budget_investments_path(0, investment)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+  end
+
   context "Index" do
 
     scenario "Displaying investments" do

spec/features/admin/budgets_spec.rb

@@ -24,6 +24,29 @@ describe "Admin budgets" do
 
   end
 
+  context "Load" do
+
+    let!(:budget) { create(:budget, slug: "budget_slug") }
+
+    scenario "finds budget by slug" do
+      visit admin_budget_path("budget_slug")
+      expect(page).to have_content(budget.name)
+    end
+
+    scenario "raises an error if budget slug is not found" do
+      expect do
+        visit admin_budget_path("wrong_budget")
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if budget id is not found" do
+      expect do
+        visit admin_budget_path(0)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+  end
+
   context "Index" do
 
     scenario "Displaying no open budgets text" do

spec/features/budgets/ballots_spec.rb

@@ -8,6 +8,55 @@ describe "Ballots" do
   let!(:california) { create(:budget_heading, group: states, name: "California", price: 1000) }
   let!(:new_york)   { create(:budget_heading, group: states, name: "New York", price: 1000000) }
 
+  context "Load" do
+
+    let(:ballot) { create(:budget_ballot, user: user, budget: budget) }
+
+    before do
+      budget.update(slug: "budget_slug")
+      ballot.investments << create(:budget_investment, :selected, heading: california)
+      login_as(user)
+    end
+
+    scenario "finds ballot using budget slug" do
+      visit budget_ballot_path("budget_slug")
+
+      expect(page).to have_content("You have voted one investment")
+    end
+
+    scenario "raises an error if budget slug is not found" do
+      expect do
+        visit budget_ballot_path("wrong_budget")
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if budget id is not found" do
+      expect do
+        visit budget_ballot_path(0)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+  end
+
+  context "Lines Load" do
+
+    let!(:investment) { create(:budget_investment, :selected, heading: california) }
+
+    before do
+      create(:budget_ballot, user: user, budget: budget)
+      budget.update(slug: "budget_slug")
+      login_as(user)
+    end
+
+    scenario "finds ballot lines using budget slug", :js do
+      visit budget_investments_path("budget_slug", states, california)
+      add_to_ballot(investment)
+
+      within("#sidebar") { expect(page).to have_content investment.title }
+    end
+
+  end
+
   context "Voting" do
 
     before do

spec/features/budgets/budgets_spec.rb

@@ -6,6 +6,30 @@ describe "Budgets" do
   let(:level_two_user)     { create(:user, :level_two) }
   let(:allowed_phase_list) { ["balloting", "reviewing_ballots", "finished"] }
 
+  context "Load" do
+
+    before { budget.update(slug: "budget_slug") }
+
+    scenario "finds budget by slug" do
+      visit budget_path("budget_slug")
+
+      expect(page).to have_content budget.name
+    end
+
+    scenario "raises an error if budget slug is not found" do
+      expect do
+        visit budget_path("wrong_budget")
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if budget id is not found" do
+      expect do
+        visit budget_path(0)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+  end
+
   context "Index" do
 
     scenario "Show normal index with links" do

spec/features/budgets/executions_spec.rb

@@ -11,6 +11,22 @@ describe "Executions" do
   let!(:investment4) { create(:budget_investment, :winner,       heading: heading) }
   let!(:investment3) { create(:budget_investment, :incompatible, heading: heading) }
 
+  scenario "finds budget by id or slug" do
+    budget.update(slug: "budget_slug")
+
+    visit budget_executions_path("budget_slug")
+    within(".budgets-stats") { expect(page).to have_content budget.name }
+
+    visit budget_executions_path(budget)
+    within(".budgets-stats") { expect(page).to have_content budget.name }
+
+    visit budget_executions_path("budget_slug")
+    within(".budgets-stats") { expect(page).to have_content budget.name }
+
+    visit budget_executions_path(budget)
+    within(".budgets-stats") { expect(page).to have_content budget.name }
+  end
+
   scenario "only displays investments with milestones" do
     create(:milestone, milestoneable: investment1)
 

spec/features/budgets/groups_spec.rb

@@ -2,8 +2,45 @@ require "rails_helper"
 
 describe "Budget Groups" do
 
-  let(:budget) { create(:budget) }
-  let(:group)  { create(:budget_group, budget: budget) }
+  let(:budget) { create(:budget, slug: "budget_slug") }
+  let!(:group)  { create(:budget_group, slug: "group_slug", budget: budget) }
+
+  context "Load" do
+
+    scenario "finds group using budget slug and group slug" do
+      visit budget_group_path("budget_slug", "group_slug")
+      expect(page).to have_content "Select an option"
+    end
+
+    scenario "finds group using budget id and group id" do
+      visit budget_group_path(budget, group)
+      expect(page).to have_content "Select an option"
+    end
+
+    scenario "raises an error if budget slug is not found" do
+      expect do
+        visit budget_group_path("wrong_budget", group)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if budget id is not found" do
+      expect do
+        visit budget_group_path(0, group)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if group slug is not found" do
+      expect do
+        visit budget_group_path(budget, "wrong_group")
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if group id is not found" do
+      expect do
+        visit budget_group_path(budget, 0)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+  end
 
   context "Show" do
     scenario "Headings are sorted by name" do

spec/features/budgets/investments_spec.rb

@@ -26,6 +26,53 @@ describe "Budget Investments" do
     it_behaves_like "relationable", Budget::Investment
   end
 
+  context "Load" do
+
+    let(:investment) { create(:budget_investment, heading: heading) }
+
+    before do
+      budget.update(slug: "budget_slug")
+      heading.update(slug: "heading_slug")
+    end
+
+    scenario "finds investment using budget slug" do
+      visit budget_investment_path("budget_slug", investment)
+
+      expect(page).to have_content investment.title
+    end
+
+    scenario "raises an error if budget slug is not found" do
+      expect do
+        visit budget_investment_path("wrong_budget", investment)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if budget id is not found" do
+      expect do
+        visit budget_investment_path(0, investment)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "finds investment using heading slug" do
+      visit budget_investment_path(budget, investment, heading_id: "heading_slug")
+
+      expect(page).to have_content investment.title
+    end
+
+    scenario "raises an error if heading slug is not found" do
+      expect do
+        visit budget_investment_path(budget, investment, heading_id: "wrong_heading")
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if heading id is not found" do
+      expect do
+        visit budget_investment_path(budget, investment, heading_id: 0)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+  end
+
   scenario "Index" do
     investments = [create(:budget_investment, heading: heading),
                    create(:budget_investment, heading: heading),

spec/features/budgets/results_spec.rb

@@ -52,6 +52,30 @@ describe "Results" do
     end
   end
 
+  scenario "Does not raise error if budget (slug or id) is not found" do
+    visit budget_results_path("wrong budget")
+
+    within(".budgets-stats") do
+      expect(page).to have_content "Participatory budget results"
+    end
+
+    visit budget_results_path(0)
+
+    within(".budgets-stats") do
+      expect(page).to have_content "Participatory budget results"
+    end
+  end
+
+  scenario "Loads budget and heading by slug" do
+    visit budget_results_path(budget.slug, heading.slug)
+
+    expect(page).to have_selector("a.is-active", text: heading.name)
+
+    within("#budget-investments-compatible") do
+      expect(page).to have_content investment1.title
+    end
+  end
+
   scenario "Load first budget heading if not specified" do
     other_heading = create(:budget_heading, group: group)
     other_investment = create(:budget_investment, :winner, heading: other_heading)

spec/features/budgets/stats_spec.rb

@@ -2,14 +2,36 @@ require "rails_helper"
 
 describe "Stats" do
 
-  let(:budget)  { create(:budget) }
+  let(:budget)  { create(:budget, :finished) }
   let(:group)   { create(:budget_group, budget: budget) }
   let(:heading) { create(:budget_heading, group: group, price: 1000) }
 
+  context "Load" do
+
+    before { budget.update(slug: "budget_slug") }
+
+    scenario "finds budget by slug" do
+      visit budget_stats_path("budget_slug")
+
+      expect(page).to have_content budget.name
+    end
+
+    scenario "raises an error if budget slug is not found" do
+      expect do
+        visit budget_stats_path("wrong_budget")
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if budget id is not found" do
+      expect do
+        visit budget_stats_path(0)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+  end
+
   describe "Show" do
     describe "advanced stats" do
-      let(:budget) { create(:budget, :finished) }
-
       scenario "advanced stats enabled" do
         budget.update(advanced_stats_enabled: true)
 

spec/features/management/budget_investments_spec.rb

@@ -3,7 +3,7 @@ require "rails_helper"
 describe "Budget Investments" do
 
   let(:manager) { create(:manager) }
-  let(:budget)  { create(:budget, phase: "selecting", name: "2033") }
+  let(:budget)  { create(:budget, phase: "selecting", name: "2033", slug: "budget_slug") }
   let(:group)   { create(:budget_group, budget: budget, name: "Whole city") }
   let(:heading) { create(:budget_heading, group: group, name: "Health") }
 
@@ -18,6 +18,33 @@ describe "Budget Investments" do
                   { "budget_id": "budget_id" },
                   management = true
 
+  context "Load" do
+
+    let(:investment) { create(:budget_investment, budget: budget) }
+    let(:user)       { create(:user, :level_two) }
+
+    before { login_managed_user(user) }
+
+    scenario "finds investment using budget slug" do
+      visit management_budget_investment_path("budget_slug", investment)
+
+      expect(page).to have_content investment.title
+    end
+
+    scenario "raises an error if budget slug is not found" do
+      expect do
+        visit management_budget_investment_path("wrong_budget", investment)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if budget id is not found" do
+      expect do
+        visit management_budget_investment_path(0, investment)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+  end
+
   context "Create" do
     before { heading.budget.update(phase: "accepting") }
 

spec/features/valuation/budget_investments_spec.rb

@@ -11,6 +11,30 @@ describe "Valuation budget investments" do
     login_as(valuator.user)
   end
 
+  context "Load" do
+
+    before { budget.update(slug: "budget_slug") }
+
+    scenario "finds investment using budget slug" do
+      visit valuation_budget_budget_investments_path("budget_slug")
+
+      expect(page).to have_content budget.name
+    end
+
+    scenario "raises an error if budget slug is not found" do
+      expect do
+        visit valuation_budget_budget_investments_path("wrong_budget")
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+    scenario "raises an error if budget id is not found" do
+      expect do
+        visit valuation_budget_budget_investments_path(0)
+      end.to raise_error ActiveRecord::RecordNotFound
+    end
+
+  end
+
   scenario "Disabled with a feature flag" do
     Setting["process.budgets"] = nil
     expect{

spec/models/budget/investment_spec.rb

@@ -382,6 +382,30 @@ describe Budget::Investment do
     end
   end
 
+  describe "scoped_filter" do
+
+    let!(:budget)     { create(:budget, slug: "budget_slug") }
+    let!(:group)      { create(:budget_group, budget: budget) }
+    let!(:heading)    { create(:budget_heading, group: group) }
+    let!(:investment) { create(:budget_investment, :feasible, heading: heading) }
+
+    it "finds budget by id or slug" do
+      result = described_class.scoped_filter({budget_id: budget.id}, nil)
+      expect(result.count).to be 1
+      expect(result.first.id).to be investment.id
+
+      result = described_class.scoped_filter({budget_id: "budget_slug"}, nil)
+      expect(result.count).to be 1
+      expect(result.first.id).to be investment.id
+    end
+
+    it "does not raise error if budget is not found" do
+      result = described_class.scoped_filter({budget_id: "wrong_budget"}, nil)
+      expect(result).to be_empty
+    end
+
+  end
+
   describe "scopes" do
     describe "valuation_open" do
       it "returns all investments with false valuation_finished" do