Ruby on Rails

I suspect department.courses returns and array and when you print it
out you get the address of the first entry in the array.

That would also explain department.courses.course_name would fail
because you have to index into the department.courses array like
department.courses[x].course_name to be able to set it

On Nov 28, 1:07 pm, Bruno Amaral <m...@brunoamaral.eu> wrote:
> I am trying to build a small database of Universities, Departments and
> Courses. But for some reason I can't seem to get a list of courses
> attached to a Department.
>
> So far I have the following Database:
> => Course(id: integer, course_name: string, length: integer,
> description: text, programme: string, department_id: integer,
> university_id: integer, created_at: datetime, updated_at: datetime)
>
> => Department(id: integer, department_name: string,
> department_description: text, head_firstname: string, head_lastname:
> string, head_email: string, university_id: integer, courses_id:
> integer, created_at: datetime, updated_at: datetime)
>
> => University(id: integer, name: string, website: string, country:
> string, city: string, departments_id: integer, courses_id: integer,
> created_at: datetime, updated_at: datetime)
>
> Models:
> class Course < ActiveRecord::Base
>         belongs_to :department
>         belongs_to :university
> end
> class Department < ActiveRecord::Base
>   belongs_to :university
>   has_many :courses
> end
> class University < ActiveRecord::Base
>   has_many :departments
>   has_many :courses
> end
>
> For the Department I am trying to run the following controller
>   def index
>     @departments = Department.includes(:courses, :university)
>
> and the following view:
> <% @departments.each do |department| %>
>   <tr>
>     <td><%= department.department_name %></td>
>     <td><%= department.department_description %></td>
>     <td><%= department.head_firstname %></td>
>     <td><%= department.head_lastname %></td>
>     <td><%= department.head_email %></td>
>     <td><%=    department.university.name %></td>
>     <td><%= department.courses %>
>
> that last line outputs #<Course:0x1042b8270> and it fails when i try
> to add something like department.courses.course_name
>
> I am at a loss here and haven't been able to find any clues on the
> documentation as to what I might be doing wrong. If anyone could at
> least point me in the right direction, that would be great.

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