如何在特定表格中显示特定属性，而不为当前用户显示所有属性RAILS 4

Question

I have a student and school database tied to my rails project I have these attributes for student table :

[id,fname,lname,created_at,updated_at,school_id,user_id]

and my school table has these attributes

[id,name,address,franchise_id,created_at,updated_at]

so far I am trying to display the school name for each student that a current user may have. but when I run it, it will show all the schools for all the students of that user on each iteration of the loop. here is my index action method where the magic is supposed to happen.

  @child = Student.where(user_id:current_user.id).pluck(:school_id)
  @schoolname = School.where(id:@child).pluck(:name)

and my index page in my view:

 <div class="container">
 <h1><font color="white"><b>My students</font></b></h1>

 <table class="table table-striped">
 <thead>
  <tr>
  <th><font color="white"><b>Id</font></b></th>
  <th><font color="white"><b>Fname</font></b></th>
  <th><font color="white"><b>Lname</font></b></th>
  <th><font color="white"><b>School</font></b></th>
  <th><font color="white"><b>manage</font></b></th>
  <th colspan="3"></th>
   </tr>
  </thead>

  <tbody>
   <% @students.each do |student| %>
      <tr>
        <td><font color="white"><b><%= student.id %></font></b></td>
       <td><font color="white"><b><%= student.fname %></font></b></td>
       <td><font color="white"><b><%= student.lname %></font></b></td>
       <td><font color="white"><b><%= @schoolname %></font></b></td>
       <td><%= link_to 'Show', student %>
       <%= link_to 'Edit', edit_student_path(student) %>
       <%= link_to 'Destroy', student, method: :delete, data: { confirm: 
       'Are you sure?' } %></td>
       </tr>
        <% end %>
        </tbody>
       </table>

       <br>

       <b><%= link_to 'Add Student', add_students_path(@student),
       {:style=>'color:#FFFFFF;'} %></b><br/>

       <b> <%= link_to 'New Student', new_student_path, 
        {:style=>'color:#FFFFFF;'} %></b>
          </div>

my model is empty

Answer 1

而不是在视图循环中使用@schoolname，而是编写student.school.name如果您的一对多关系有效，那么应该可以。

Answer 2

Sorry I don't the ability to comment but I wanted to ask where you assign @students ? You use it in your view but I don't see it in your controller's index method. Also @student should be student in the link_to methods at the end.