Feature: Improve label experience (#975)

Co-authored-by: Sojan <sojan@pepalo.com>

db/migrate/20200625124400_migrate_and_add_unique_index_to_labels.rb

@@ -0,0 +1,20 @@
+class MigrateAndAddUniqueIndexToLabels < ActiveRecord::Migration[6.0]
+  def change
+    add_index :labels, [:title, :account_id], unique: true
+    migrate_existing_tags
+  end
+
+  private
+
+  def migrate_existing_tags
+    ::ActsAsTaggableOn::Tag.all.each do |tag|
+      tag.taggings.each do |tagging|
+        ensure_label_for_account(tag.name, tagging.taggable.account)
+      end
+    end
+  end
+
+  def ensure_label_for_account(name, account)
+    account.labels.where(title: name.downcase).first_or_create
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2020_06_10_143132) do
+ActiveRecord::Schema.define(version: 2020_06_25_124400) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_stat_statements"
@@ -280,6 +280,7 @@ ActiveRecord::Schema.define(version: 2020_06_10_143132) do
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
     t.index ["account_id"], name: "index_labels_on_account_id"
+    t.index ["title", "account_id"], name: "index_labels_on_title_and_account_id", unique: true
   end
 
   create_table "messages", id: :serial, force: :cascade do |t|