fohow_admin/db/migrate/20200504114641_create_carts.rb

# encoding:utf-8
class CreateCarts < ActiveRecord::Migration
  def up
    #购物车表
    create_table :carts do |t|
      # 会员ID
      t.column :user_id, :integer, :limit => 8, :default => 0
      # 微信ID
      t.column :wx_user_id, :integer, :limit => 8, :default => 0
      # 产品ID
      t.column :product_id, :integer, :limit => 8, :default => 0
      # 数量
      t.column :nums, :integer, :limit => 8, :default => 0
      # 是否购买
      t.column :is_buy, :boolean, :default=>1
      t.timestamps
    end

    #订单明细表
    create_table :order_details do |t|
      # 订单ID
      t.column :order_id, :integer, :limit => 8, :default => 0
      # 产品ID
      t.column :product_id, :integer, :limit => 8, :default => 0
      # 数量
      t.column :nums, :integer, :limit => 8, :default => 0
      # 价格
      t.column :price, :integer, :limit => 8, :default => 0
      # 产品名称
      t.column :product_name, :string,:limit => 500
      t.timestamps
    end

  end

  def down
  	drop_table :carts
  end
end