数据库语句使用rails已有的

app/controllers/admin_controller.rb

@@ -596,7 +596,7 @@ class AdminController < ApplicationController
   #代码测试列表
   def code_work_tests
     #求出所有条数
-    tCount = StudentWorkTest.find_by_sql("select count(*) from code_tests").first['count(*)']
+    tCount = CodeTests.count()
 
     #设置个空的数组 以便paginateHelper来分页
     @code_work_tests = []
@@ -615,7 +615,8 @@ class AdminController < ApplicationController
       if is_test[test['student_work_id']] != nil
           test['is_test'] = is_test[test['student_work_id']]
       else
-          test['is_test'] = CodeTests.find_by_sql("select is_test from student_works where id = #{test['student_work_id']}").first['is_test']
+          test['is_test'] = StudentWork.find(test['student_work_id']).is_test
+          #test['is_test'] = CodeTests.find_by_sql("select is_test from student_works where id = #{test['student_work_id']}").first['is_test']
           is_test[test['student_work_id']] = test['is_test']
       end
     end

app/views/admin/code_work_tests.html.erb

@@ -40,7 +40,7 @@
                 <%=link_to(test['homework_id'], student_work_index_path(:homework => test['homework_id']))%>
               </td>
               <td style="text-align: center; " title='<%=test['student_work_id']%>'>
-                <% if test['is_test'] == 0 %>
+                <% if !test['is_test'] %>
                     <%=link_to(test['student_work_id'], student_work_index_path(:homework => test['homework_id'],:student_work_id=>test['student_work_id']))%>
                 <% else %>
                     <%=link_to(test['student_work_id'], new_user_commit_homework_users_path(homework_id: test['homework_id'], is_test: true))%>