Add selected attribute to proposals

app/models/proposal.rb

@@ -74,6 +74,7 @@ class Proposal < ApplicationRecord
   scope :successful,               -> { where("cached_votes_up >= ?", Proposal.votes_needed_for_success) }
   scope :unsuccessful,             -> { where("cached_votes_up < ?", Proposal.votes_needed_for_success) }
   scope :public_for_api,           -> { all }
+  scope :selected,                 -> { where(selected: true) }
   scope :not_supported_by_user,    ->(user) { where.not(id: user.find_voted_items(votable_type: "Proposal").compact.map(&:id)) }
   scope :published,                -> { where.not(published_at: nil) }
   scope :draft,                    -> { where(published_at: nil) }

db/migrate/20190410132842_add_selected_to_proposal.rb

@@ -0,0 +1,5 @@
+class AddSelectedToProposal < ActiveRecord::Migration
+  def change
+    add_column :proposals, :selected, :bool, default: false, index: true
+  end
+end

db/schema.rb

@@ -1194,6 +1194,7 @@ ActiveRecord::Schema.define(version: 20190429125842) do
     t.text     "retired_explanation"
     t.integer  "community_id"
     t.datetime "published_at"
+    t.boolean  "selected",                       default: false
     t.index ["author_id", "hidden_at"], name: "index_proposals_on_author_id_and_hidden_at", using: :btree
     t.index ["author_id"], name: "index_proposals_on_author_id", using: :btree
     t.index ["cached_votes_up"], name: "index_proposals_on_cached_votes_up", using: :btree

spec/factories/proposals.rb

@@ -33,6 +33,10 @@ FactoryBot.define do
       created_at { 25.months.ago }
     end
 
+    trait :selected do
+      selected true
+    end
+
     trait :with_hot_score do
       before(:save) { |d| d.calculate_hot_score }
     end

spec/models/proposal_spec.rb

@@ -866,6 +866,23 @@ describe Proposal do
     end
   end
 
+  describe "selected" do
+    let!(:unselected_proposal) { create(:proposal) }
+    let!(:selected_proposal)   { create(:proposal, :selected) }
+
+    it "selected? is true" do
+      expect(unselected_proposal.selected?).to be false
+      expect(selected_proposal.selected?).to be true
+    end
+
+    it "scope selected" do
+      selected = Proposal.selected
+
+      expect(selected.size).to be 1
+      expect(selected.first).to eq selected_proposal
+    end
+  end
+
   describe "public_for_api scope" do
     it "returns proposals" do
       proposal = create(:proposal)