hello folks, i’m playing around with RoR and let’s say I have 2 tables
in ny DB: products and categories. each product must have a category.
i can associate the category_id field in products table with the
different categories that already exist (i used scaffolding). what i
cannot do -and i can’t see where the problem is- is to retrieve the
category name when i’m displaying my product info.
in my app/views/product/list.rhtml i have:
<td><%=h product.title %></td>
<td><%=h product.category.name %></td>
<td><%=h product.price %></td>
<td><%=h product.stock %></td>
and it keeps saying ‘You have a nil object when you didn’t expect it!’
as I want to get product.category.name
my models are:
class Product < ActiveRecord::Base
belongs_to :category
end
class Category < ActiveRecord::Base
has_many :products
end
the most strange thing of this is that in app/views/product/
_form.rhtml i have:
<%= collection_select :product, :category_id, @categories, :id, :name
%>
and the combo fills up with the categories name!
what am i doing wrong?