Question

I have a table which list a set amount of managers. In the Manager User Id column I am trying to get the name to appear instead of the integer. I have the following relationships

User model

has_many :roles, :through => :roles_users
  has_many :projects, :foreign_key => "manager_user_id"

Projects

class Project < ActiveRecord::Base
  belongs_to :user, :foreign_key => "manager_user_id"

Index.html.erb

    <tr>


  <td><%= project.project_number %></td>
  <td><%= project.project_name %></td>
  **<td><%= user.project.manager_user_id%></td>**
  <td><center><%= link_to image_tag("icons/user.png"), project %></center></td>
  <td><center><%= link_to image_tag("icons/user_edit.png"), edit_project_path(project) %></center></td>
  <td><center><%= link_to image_tag("icons/user_delete.png"), project, :confirm => 'Are you sure?', :method => :delete %></center></td>

    </tr>

I have tried the following:

• project.user.manager_user_id
• user.project.manager_user_id

Neither of these work and I get this error: undefined local variable or method `user’ for #<#:0xb14cf5c>

What is it that I am doing wrong. I used the above similar method for another table and this worked fine.

Answer 1

It looks from your view that you have project defined in the view, but not user. That being so, you definitely want the project.user form. That also makes sense in that a Project only has one associated User, whereas a User has multiple Projects, so user.project is an array.

Secondly, remember that manager_user_id is a member of Project, not of User, so project.user.manager_user_id won’t work.

I suspect you want something like project.user.name.