Question

我的索引中有这个。但是，该命令不起作用。我可以就错误的位置得到一些反馈吗？

生成器索引

def index
    @generators=Generator.order("created_at DESC")
  end

结果索引

 def index
    @results=Result.all
  end

这是日志

Started GET "/generators" for 127.0.0.1 at 2013-12-22 13:18:20 +0800
Processing by GeneratorsController#index as HTML
  ←[1m←[35mUser Load (2.0ms)←[0m  SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1  [["id", 1]]
  ←[1m←[36mCACHE (0.0ms)←[0m  ←[1mSELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1←[0m  [["id", 1]]
  ←[1m←[35mGenerator Load (3.0ms)←[0m  SELECT "generators".* FROM "generators" WHERE "generators"."user_id" = $1  [["user_
id", 1]]
  ←[1m←[36mResult Load (2.0ms)←[0m  ←[1mSELECT "results".* FROM "results" WHERE "results"."generator_id" = $1 ORDER BY "re
sults"."id" ASC LIMIT 1←[0m  [["generator_id", 10]]
  ←[1m←[35mResult Load (2.0ms)←[0m  SELECT "results".* FROM "results" WHERE "results"."generator_id" = $1 ORDER BY "result
s"."id" ASC LIMIT 1  [["generator_id", 14]]

索引页

这是生成器索引页面。没有结果索引页

<html>
<body>
<div id="view_index">
        <h2 align="center">Primer Generated Results</h2>
            <p align ="center"><font size ="5"><strong>*** <u>Click Analyze for Binding-Time Analysis</u> *** </p></font></strong>  

<table class="index">
    <thead>
          <tr>
              <th class="no_col">Primer length</th>
              <th class="sstring_col">Method used</th>
              <th class="rpg_col">Random primer generated <b>[5'->3']</b></th>
              <th class="no_col">T<sub>m</sub> (<sup>o</sup>C)</th>
              <th class="string_col">Generated Time (UTC +8:00)</th>
              <th class="sstring_col">Reference sequence</th>
              <th class="gs_col">Description of reference sequence</th>
              <th class="no_col">Binding of primer (no.of times)</th>
          </tr>
    </thead>

    <tbody>
            <% current_user.generators.each do |generator| %>
          <tr class="result">
                <td align="center"><%= generator.primer_length %></td>
                <td align="center"><%= generator.choice %></td>
                <td>               <%= generator.random_primer_generated %></td>
                <td align="center"><%= generator.melting_temp %><sup>o</sup>C</td>
                <td>               <%= generator.created_at %></td>

                <% if generator.result.present? %>
                        <% if generator.result.ncbi_ref_seq.blank?%>
                            <td> NIL </td>
                            <td> SAMPLE </td>
                            <td align="center"><%= generator.result.binding_times %></td>
                        <%else%>
                            <td>               <%= generator.result.ncbi_ref_seq %></td>
                            <td>               <%= generator.result.genome_sample %></td>
                            <td align="center"><%= generator.result.binding_times %></td>
                        <%end%>
                <td id="change"><%= link_to 'Details',generator_result_path(:generator_id=>generator.id, :id=>generator.result.id) %></td>
                <td id="change"><%= link_to 'Delete',generator, :method => :delete, data: { confirm: 'Are you sure?' } %></td>
                <% else %>
                    <td></td>
                    <td></td>
                    <td></td>
                    <td id="change"><%= link_to 'Analyze',generator_path(generator) %></td>
                    <td id="change"><%= link_to 'Delete',generator,:method => :delete, data: { confirm: 'Are you sure?' } %></td>
                <% end %>
         </tr>
             <% end %>
          </tbody>
        </table>
</div>
</body> 
</html>

Answer 1

您可以在Generator模型中设置默认范围

default_scope order('created_at DESC')

Answer 2

Generator.all.order("created_at DESC")

订单无效

2 个答案: