无法使用 Rails 检索列数据 3

Question

我想使用 Rails 3 访问一列数据，但无法检索 it.Finally 呈现输出时出现空数组 table.Please 检查我的 table 首先是下面给出的。

table- Payment_vendors:
id  Receipt_No   type   v_amount    v_date      c_date      v_name    v_status

7    150325006   SWD     60.00     2015-04-15  2015-04-28   Deepak    No

8    150325006   GOODS   1195.00   2015-04-15  2015-04-28   Deepak    No

从上面的 table 我想访问 "type" 列通过使用 v_name.I 尝试过一次但是得到空 array.I 解释我的代码。

payment.html.erb:

<div class="tbpaddingdiv2">
    <%= form_for :payment,:url => {:action => "check_type" },remote: true do |f| %>
    <div class="totalaligndiv">
      <div class="input-group bmargindiv1 col-md-6 pull-left"><span class="input-group-addon text-left"><div class="leftsidetextwidth">Type :</div></span>
      <%= f.select(:s_catagory,options_for_select([['Wood','Woods'],['Puja Samagree','GOODS'],['Sweeper','SWD'],['Photo Grapher','PHOTO'],['Burning Assistant','BURNING'],['BRAHMIN','BRAHMIN']],selected: "Type"),{},{:class => 'form-control',:onchange => ("$('#switch_car').submit()")}) %>
      </div>
      <div id="div_select" style="display:none">
      <div class="input-group bmargindiv1 col-md-6 pull-left" ><span class="input-group-addon text-left" ><div class="leftsidetextwidth">Select Vendor :</div></span>
      <div id="name-option">

      </div>
      </div>
      </div>
      <div class="clearfix"></div>
      <div class="tbpaddingdiv1 text-center">
        <%= f.submit "submit",:class => "btn btn-success",:id => "switch_car" %>
      </div>
    </div>
    <% end %>
</div>

payments_controller.rb:

class PaymentsController < ApplicationController

    def payment
        @payment=Vendor.new
        respond_to do |format|
            format.html 
            format.js
        end

    end
    def check_type  
        if params[:commit]=="submit"
           @vendor_type=PaymentVendor.where(:v_name => params[:payment][:v_name] ).pluck(:type)
        else
            @v_name=Vendor.where(:s_catagory => params[:payment][:s_catagory] ).pluck(:v_name)
        end
    end
end

check_type.js.erb:

<% if @v_name %>
$("#div_select").css("display", "block");
$("#name-option").html("<%= escape_javascript (render 'nameoption' ) %>");
$("#name-option").slideDown(350);
<% end %>
<% if @vendor_type  %>
console.log('hello')
$(".flash-message").html('<%= escape_javascript flash[:notice] %>');
$("#paymentdetail").css("display", "block");
$("#paymentoption").html("<%= escape_javascript (render 'paymentdetails' ) %>");
$("#paymentoption").slideDown(350);
<% end %>

当type=="SWD"获取我需要的所有列数据后，该行的所有相关值将显示在table.

下方

paymentdetails.html.erb:

<table class="table table-bordered">
    <colgroup>
        <col class="col-md-1 col-sm-1">
        <col class="col-md-1 col-sm-1">
        <col class="col-md-3 col-sm-3">
        <col class="col-md-3 col-sm-3">
        <col class="col-md-4 col-sm-4">
    </colgroup>
    <thead>
        <tr>
            <th class="text-center"><input type="checkbox"></th>
            <th class="text-center">Sl. No</th>
            <th class="text-center">Date</th>
            <th class="text-center">Receipt No.</th>
            <th class="text-center">Amount</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <th class="text-center"><input type="checkbox" id="checkbox1-1" name="checkbox1-1"></th>
            <td class="text-center"></td>
            <td class="text-center"></td>
            <td class="text-center"></td>
            <td class="text-center"><i class="fa fa-rupee"></i></td>
        </tr>
    </tbody>
</table>

请帮我解决这个问题。

Answer 1

您正试图通过 params[:payment][:v_name] 而不是 params[:v_name]

试试这个：在控制器的 check_type 方法中：

@vendor_type = PaymentVendor.where(:v_name => params[:v_name] ).pluck(:type)

无法使用 Rails 检索列数据 3

Cannot retrieve a column data using Rails 3

ruby

ruby-on-rails-3.2