Initial commit

db/migrate/20180325001828_create_markets.rb

@@ -0,0 +1,22 @@
+# encoding: UTF-8
+# frozen_string_literal: true
+
+class CreateMarkets < ActiveRecord::Migration[4.2]
+  def change
+    create_table :markets do |t|
+      t.string  :ask_unit,      null: false, limit: 5,                 index: true
+      t.string  :bid_unit,      null: false, limit: 5,                 index: true
+      t.decimal :ask_fee,       null: false,            default: 0,    precision: 7, scale: 6
+      t.decimal :bid_fee,       null: false,            default: 0,    precision: 7, scale: 6
+      t.integer :ask_precision, null: false, limit: 1,  default: 4
+      t.integer :bid_precision, null: false, limit: 1,  default: 4
+      t.integer :position,      null: false,            default: 0,    index: true
+      t.boolean :visible,       null: false,            default: true, index: true
+      t.timestamps              null: false
+    end
+
+    change_column :markets, :id, :string, limit: 10
+
+    add_index :markets, %i[ ask_unit bid_unit ], unique: true
+  end
+end