purchaseorder

PurchaseOrder describes a transaction where a customer buys one or more products .

PurchaseOrder描述一个客户购买一个或多个产品的事务。

The latter is then used to write the PurchaseOrder object instance to the database .

后者随后用于将PurchaseOrder对象实例写入数据库。

A PurchaseOrder will have " date ,"" customer ," and " products " properties .

PurchaseOrder将具有“日期”、“客户”和“产品”属性。

The vector following the name PurchaseOrder defines the datatype 's fields .

遵循名称PurchaseOrder的矢量定义了数据类型的字段。

For this use case , I removed the order details section from my PurchaseOrder schema to keep things simple .

对于这个用例，为简单起见我从PurchaseOrder模式中除去了订单细节部分。

The arcs ( arrows ) represent events that can occur , causing the PurchaseOrder to transition from one state to another .

弧线（箭头）表示可能发生的事件，导致PurchaseOrder从一个状态转移到另外一个状态。

This meant if you were looking for all data elements that were of type PurchaseOrder , you had to hard code every possible qualified name in your search .

这意味着如果你查找所有PurchaseOrder类型的数据元素，你必须在你的搜索中硬编码每一个可能吻合的名字。

Once the instance is constructed , you can call the invoice and manifest functions on your PurchaseOrder object , which uses the implementations provided in the defrecord .

一旦构造了实例，您就可以在您的PurchaseOrder对象上调用invoice和manifest函数，其使用在defrecord中提供的实现。