困惑錢-Rails的寶石

我通過簡單的計算器應用程序工作我的方式...困惑錢-Rails的寶石

試圖整合在它的錢，寶石，但是迷茫......

這是當前模式（如你可以看到，它沒有與_cents結尾的列...和非常困惑是否需要_cents部分...

當前架構

ActiveRecord::Schema.define(version: 20170301051956) do 

    # These are extensions that must be enabled in order to support this database 
    enable_extension "plpgsql" 

    create_table "tippies", force: :cascade do |t| 
    t.float "tip",  null: false 
    t.decimal "cost",  null: false 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    end 

end

在模型中，我加入monetize :tip & monetize: cost ...

我是否需要修改tip和cost列模式，即改造它是整數，並添加後_cents一部分？

電流模型

class Tippy < ApplicationRecord 

    validates :tip, presence: true 
    validates :cost, presence: true 

    monetize :tip 
    monetize :cost 


    TIP_CHOICES = { "10%" => ".10", "20%" => ".20", "30%" => ".30", "40%" => ".40", "50%" => ".50", 
        "60%" => ".60", "70%" => ".70", "80%" => ".80", "90%" => ".90" } 


    def calculation_of_total_cost 
     cost + (tip * cost) 
    end 

end

當我嘗試去到我的主頁（它設置到新頁面），我得到這個錯誤：

ArgumentError in TippiesController#new

Unable to infer the name of the monetizable attribute for 'tip'. Expected amount column postfix is '_cents'. Use :as option to explicitly specify the name or change the amount column postfix in the initializer.

它特指模型中的monetize :tip ...

Show.html.erb

<br/><br/> 
<h1 class="text-center">Your Total Cost</h1> 
<br/><br /> 


<table class="table table-striped"> 
    <tr> 
     <td> 
      Cost of Your Meal: 
     </td> 
     <td> 
      <%= humanized_money_with_symbol @tippy.cost) %> 
     </td> 
    </tr> 
    <tr> 
     <td> 
      Tip You Picked: 
     </td> 
     <td> 
      <%= number_to_percentage(@tippy.tip * 100, format: "%n%", precision: 0) %> 
     </td> 
    </tr> 
    <tr> 
     <td> 
      The Total Cost: 
     </td> 
     <td> 
      <%= number_to_currency(@tippy.calculation_of_total_cost) %> 
     </td> 
    </tr> 
</table>

new.html.erb

<br /><br /> 
<h1 class="text-center">Calculate Your Tip!</h1> 

<%= render 'form', tippy: @tippy %>

_form.html.erb

<%= form_for(tippy, :html => {'class' => "form-horizontal"}) do |f| %> 
    <% if tippy.errors.any? %> 
    <div id="error_explanation"> 
     <h2><%= pluralize(tippy.errors.count, "error") %> prohibited this tippy from being saved:</h2> 

     <ul> 
     <% tippy.errors.full_messages.each do |message| %> 
     <li><%= message %></li> 
     <% end %> 
     </ul> 
    </div> 
    <% end %> 


    <div class="field form-group"> 
    <%= f.label :cost_of_your_meal, class: "control-label" %> 
    <%= f.text_field :cost, class: "form-control" %> 
    </div> 

    <div class="field form-group"> 
    <%= f.label :pick_your_tip, class: "control-label" %> 
    <%= f.select(:tip, Tippy::TIP_CHOICES, class: "form-control") %> 
    </div> 


    <div class="actions"> 
    <%= f.submit class: "btn btn-primary btn-lg btn-block" %> 
    </div> 
<% end %>

如何使這項工作？請讓我知道是否需要更多信息。謝謝

來源

2017-03-10 user273072545345

對所有**貨幣列使用小數類型（不是float）。 – max

@max，所以，重命名所有列以添加'_cents'並使其浮動？ – user273072545345

money-rails有自己的遷移方法 - [閱讀文檔]（https://github.com/RubyMoney/money-rails） – max

起初我也對此感到困惑。該寶石希望您使用它提供的第一列，這是與_cents添加到列的名稱。所以，你的模型應該有這個在它

monetize :tip_cents 
monetize :cost_cents

該列，並與_currency一列由寶石創建的。

來源

2017-12-31 22:25:28

困惑錢-Rails的寶石

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