Ruby on rails Rails：根据不同的字段类型计算多个结果的总和

我的用户有许多与他们相关的投资模型。我需要做的是计算他们所有贡献的总和：每月一列关于投资模型的内容，我将在下面讨论

在我的控制器中，我有：

   #get Investment types that are Roth IRAs, Traditional IRAs, etc.
    @getira = Investment.where(user_id: current_user, investmenttype: ["Roth IRA","Traditional IRA","Other"])

通常，我会在该查询中添加.sum:contributions。然而，并非所有捐款都是平等的

投资还有一个：contributionfrequency字段，这是一个字符串，用户可以在其中选择每月、每季度或每年

因此，我在同一控制器中添加了以下内容：

当我执行此操作时，会出现以下错误：

找不到没有ID的投资

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我不确定是否进行了正确的查询，或者是否在此处输入了正确的字段

您一定收到了错误，无法在下一行中找到没有ID的投资

 investment = @getira.find(params[:contributionfrequency])

这仅仅意味着params[：contributionfrequency]为零，即您没有在params中传递键：contributionfrequency

根据与OP的聊天会话，删除了参数[：contributionfrequency]，并使用了直接查询：

@contribution_quarterly = Investment.where(user_id: current_user, investmenttype: ["Roth IRA","Traditional IRA","Other"], contributionfrequency: ["Quarterly"]).sum(:contribution) 
@contribution_monthly = Investment.where(user_id: current_user, investmenttype: ["Roth IRA","Traditional IRA","Other"], contributionfrequency: ["Monthly"]).sum(:contribution) 
@contribution_annually = Investment.where(user_id: current_user, investmenttype: ["Roth IRA","Traditional IRA","Other"], contributionfrequency: ["Annually"]).sum(:contribution) 

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如何在参数中传递键：contributionfrequency？

@contribution_quarterly = Investment.where(user_id: current_user, investmenttype: ["Roth IRA","Traditional IRA","Other"], contributionfrequency: ["Quarterly"]).sum(:contribution) 
@contribution_monthly = Investment.where(user_id: current_user, investmenttype: ["Roth IRA","Traditional IRA","Other"], contributionfrequency: ["Monthly"]).sum(:contribution) 
@contribution_annually = Investment.where(user_id: current_user, investmenttype: ["Roth IRA","Traditional IRA","Other"], contributionfrequency: ["Annually"]).sum(:contribution)