Initial commit

db/migrate/20180329145257_alter_trades_currency.rb

@@ -0,0 +1,9 @@
+# encoding: UTF-8
+# frozen_string_literal: true
+
+class AlterTradesCurrency < ActiveRecord::Migration[4.2]
+  def change
+    change_column :trades, :currency, :string, limit: 10
+    rename_column :trades, :currency, :market_id
+  end
+end