Bump acts-as-taggable-on to 6.0.0

Rails 5.1 introduced certain changes in the way a record is touched when
the counter cache option is enabled in a belongs to association.

We need to upgrade acts-as-taggable-on so it keeps changing the
`updated_at` attribute when a new tag is added to a record.

Note we now need to reload the records in some cases to get the
`context_tag_list` method to return what we expect. Methods like
`context_tags` however work properly with no need to reload the record.

Gemfile

@@ -2,7 +2,7 @@ source "https://rubygems.org"
 
 gem "rails", "5.1.7"
 
-gem "acts-as-taggable-on", "~> 5.0.0"
+gem "acts-as-taggable-on", "~> 6.0.0"
 gem "acts_as_votable", "~> 0.11.1"
 gem "ahoy_matey", "~> 1.6.0"
 gem "ancestry", "~> 3.0.7"

Gemfile.lock

@@ -47,8 +47,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    acts-as-taggable-on (5.0.0)
+    acts-as-taggable-on (6.0.0)
-      activerecord (>= 4.2.8)
+      activerecord (~> 5.0)
     acts_as_votable (0.11.1)
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
@@ -602,7 +602,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  acts-as-taggable-on (~> 5.0.0)
+  acts-as-taggable-on (~> 6.0.0)
   acts_as_votable (~> 0.11.1)
   ahoy_matey (~> 1.6.0)
   ancestry (~> 3.0.7)

db/migrate/20190619133544_add_missing_unique_indices.acts_as_taggable_on_engine.rb

@@ -0,0 +1,17 @@
+# This migration comes from acts_as_taggable_on_engine (originally 2)
+if ActiveRecord.gem_version >= Gem::Version.new("5.0")
+  class AddMissingUniqueIndices < ActiveRecord::Migration[4.2]; end
+else
+  class AddMissingUniqueIndices < ActiveRecord::Migration; end
+end
+AddMissingUniqueIndices.class_eval do
+  def self.up
+    add_index :taggings,
+              [:tag_id, :taggable_id, :taggable_type, :context, :tagger_id, :tagger_type],
+              unique: true, name: "taggings_idx"
+  end
+
+  def self.down
+    remove_index :taggings, name: "taggings_idx"
+  end
+end

db/migrate/20190619133547_add_missing_indexes_on_taggings.acts_as_taggable_on_engine.rb

@@ -0,0 +1,22 @@
+# This migration comes from acts_as_taggable_on_engine (originally 6)
+if ActiveRecord.gem_version >= Gem::Version.new("5.0")
+  class AddMissingIndexesOnTaggings < ActiveRecord::Migration[4.2]; end
+else
+  class AddMissingIndexesOnTaggings < ActiveRecord::Migration; end
+end
+AddMissingIndexesOnTaggings.class_eval do
+  def change
+    add_index :taggings, :taggable_id unless index_exists? :taggings, :taggable_id
+    add_index :taggings, :taggable_type unless index_exists? :taggings, :taggable_type
+    add_index :taggings, :tagger_id unless index_exists? :taggings, :tagger_id
+    add_index :taggings, :context unless index_exists? :taggings, :context
+
+    unless index_exists? :taggings, [:tagger_id, :tagger_type]
+      add_index :taggings, [:tagger_id, :tagger_type]
+    end
+
+    unless index_exists? :taggings, [:taggable_id, :taggable_type, :tagger_id, :context], name: "taggings_idy"
+      add_index :taggings, [:taggable_id, :taggable_type, :tagger_id, :context], name: "taggings_idy"
+    end
+  end
+end

db/schema.rb

@@ -1390,8 +1390,15 @@ ActiveRecord::Schema.define(version: 20191108173350) do
     t.integer "tagger_id"
     t.string "context", limit: 128
     t.datetime "created_at"
+    t.index ["context"], name: "index_taggings_on_context"
+    t.index ["tag_id", "taggable_id", "taggable_type", "context", "tagger_id", "tagger_type"], name: "taggings_idx", unique: true
     t.index ["tag_id"], name: "index_taggings_on_tag_id"
     t.index ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context"
+    t.index ["taggable_id", "taggable_type", "tagger_id", "context"], name: "taggings_idy"
+    t.index ["taggable_id"], name: "index_taggings_on_taggable_id"
+    t.index ["taggable_type"], name: "index_taggings_on_taggable_type"
+    t.index ["tagger_id", "tagger_type"], name: "index_taggings_on_tagger_id_and_tagger_type"
+    t.index ["tagger_id"], name: "index_taggings_on_tagger_id"
   end
 
   create_table "tags", id: :serial, force: :cascade do |t|

spec/models/budget/investment_spec.rb

@@ -1327,7 +1327,7 @@ describe Budget::Investment do
       let(:investment) { create(:budget_investment, :with_milestone_tags) }
 
       it "has milestone_tags" do
-        expect(investment.milestone_tag_list.count).to eq(1)
+        expect(investment.reload.milestone_tag_list.count).to eq(1)
       end
     end
   end

spec/models/legislation/process_spec.rb

@@ -218,7 +218,7 @@ describe Legislation::Process do
       let(:process) { create(:legislation_process, :with_milestone_tags) }
 
       it "has milestone_tags" do
-        expect(process.milestone_tag_list.count).to eq(1)
+        expect(process.reload.milestone_tag_list.count).to eq(1)
       end
     end
   end

spec/models/proposal_spec.rb

@@ -1045,7 +1045,7 @@ describe Proposal do
       let(:proposal) { create(:proposal, :with_milestone_tags) }
 
       it "has milestone_tags" do
-        expect(proposal.milestone_tag_list.count).to eq(1)
+        expect(proposal.reload.milestone_tag_list.count).to eq(1)
       end
     end
   end