Initial commit

db/migrate/20181017114624_enumerize_wallet_kind.rb

@@ -0,0 +1,15 @@
+class EnumerizeWalletKind < ActiveRecord::Migration[4.2]
+  def change
+    id_kind_hash = Wallet.pluck(:id, :kind).to_h
+
+    remove_column :wallets, :kind
+    add_column :wallets, :kind, :integer, limit: 4, null: false, after: :address
+
+    Wallet.find_each { |w| w.update!(kind: id_kind_hash[w.id]) }
+
+    add_index :wallets, :status
+    add_index :wallets, :kind
+    add_index :wallets, :currency_id
+    add_index :wallets, %i[kind currency_id status]
+  end
+end