在drupal的官网看到commerce userpoints模块的介绍；可以让网站用户使用网站余额付款；但配置总不能成功；显示“This order cannot be paid with points because there is no exchange rate configured.”意思就是说，我没有设置好转换率；

检查官网的配置介绍原文如下：

1. Enable the module
2. Create a taxonomy term in userpoints vocabulary (Say "Credit" for instance)
3. Go to Store > Config > Commerce points settings

• Setup the taxonomy term that will serve as "money"
• Setup the price component that can be paid by the points (base_price is the standard product total)
• Setup the decimal multiplicator. Points are handled as "Integer" while prices are most of the time "Decimals" (Even thought Drupal Commerce manages it
• with Integer to avoid calculation precision issues). The easiest way to handle it is to have a "100 points = 1 currency" value
• conversion rate. To keep this conversion rate, leave the field value to 1.

• Grant points to your user (either manually, through rules... whatever your workflow requires)

第一步和第二步好理解；配置也很简单；

但是第三步， 

Go to Store > Config > Commerce points settings

store菜单下有config，但是config菜单下没有Commerce points settings

剩下的全是废话，完全找不到配置的地方；

然后又去模块页面，发现模块后面可以点击“配置”按钮；

进去以后，为“Currency settings”的“points Currencies”选项卡内

进行以下设置

• Setup the taxonomy term that will serve as "money"
• Setup the price component that can be paid by the points (base_price is the standard product total)
• Setup the decimal multiplicator. Points are handled as "Integer" while prices are most of the time "Decimals" (Even thought Drupal Commerce manages it
• with Integer to avoid calculation precision issues). The easiest way to handle it is to have a "100 points = 1 currency" value
• conversion rate. To keep this conversion rate, leave the field value to 1.

• Grant points to your user (either manually, through rules... whatever your workflow requires)

但发现无论如何设置，依然无法支付；到底如何才能配置正确，达到 “1 point == 1 元”的效果！

这个模块网络上的资料太少；如果有更方便的模块烦请告知一下；