Question

在我的Rails应用程序中，我在创建新记录后获得了最后一个Expense记录的重复，但我希望在复制时排除一个属性：description_other，＆＃34; ＆＃34;

expenses_controller.rb

class ExpensesController < ApplicationController

 # GET /expenses/new
  def new
    if Expense.last.present?
      @expense = Expense.last.dup
    else
      @expense = Expense.new
    end
   end

def expense_params
      params.require(:expense).permit(:date, :description, :description_other, :trips, :fare, :credit)
    end
end

_form.html.erb

<div class="row">
  <div class="col-md-3 col-md-offset-4">

    <%= form_for(@expense) do |f| %>

   <div class="form-group">
    <%= f.label :date %><br>
    <span class="datetime"><%= f.date_select :date %></span>
  </div>

  <div class="form-group">
        <%= f.label :credit %><br>
        <%= f.text_field :credit, class: "form-control" %>
    </div>

  <div class="form-group">
  <%= f.label :description %><br>
  <%= f.select(:description, options_for_select([['PLEASE SELECT...', ''],['METRO', 'METRO'], ['BUS', 'BUS'], ['TAXI', 'TAXI'], ['OTHERS', 'OTHERS'], ['FOOTLOOSE', 'FOOTLOOSE']]), {}, {class: "form-control", id: "expense_description"}) %>
  <br>
  <div id="otherDesc">
    <%= f.text_field :description_other, class: "form-control" %>
  </div>
</div>

  <div class="form-group">
    <%= f.label :trips %><br>
    <%= f.number_field :trips, class: "form-control" %>
  </div>

  <div class="form-group">
    <%= f.label :fare %><br>
    <%= f.text_field :fare, class: "form-control" %>
  </div>

  <br>
  <div style="margin-left: 70px;" class="form-group">
    <%= f.submit @expense.new_record? ? "Create Expense" : "Update Expense", class: "btn btn-lg btn-primary" %>
  </div>

  <% end %>

</div>
</div>

我已经尝试但无法获得所需的结果。

欢迎任何建议。

提前谢谢。

Answer 1

你应该添加

<div id="otherDesc">
<%= f.text_field :description_other, class: "form-control", value: " "%>
</div>

Answer 2

使用点按，然后通过设置为nil

排除属性

def new
  if Expense.last.present?
    # exclude here
    @expense  = Expense.last.dup.tap do | exp |
                  exp.description_other = nil  
                end
  else
    @expense = Expense.new
  end
end

除了一个属性外，在Rails中复制一条记录？

2 个答案: