NoMethodError

ruby-talk
1

I am trying to validate the uniqueness of a field:

class Department < ActiveRecord::Base
  belongs_to :company
  belongs_to :region
  has_many :employees
  validates_presence_of :dept_name
end

When I run it, I get this error message:

NoMethodError in Department#create

Showing app/views/department/_form.rhtml where line #34 raised:

You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occured while evaluating nil.each

Extracted source (around line #34):

31: <% if @page_title == "New Department" %>
32: <select name="department[company_id]">
33: <option value="0">Select One</option>
34: <% @companies.each do |company| %>
35: <option value="<%= company.id %>">
36: <%= company.comp_name %>
37: </option>

However, if I take validates_uniqueness_of off, i.e.:

class Department < ActiveRecord::Base
  belongs_to :company
  belongs_to :region
  has_many :employees
  #validates_uniqueness_of :dept_name
end

everything works just fine. What am I doing wrong?

George

2

I am trying to validate the uniqueness of a field:

[ snip ]

However, if I take validates_uniqueness_of off, i.e.:

class Department < ActiveRecord::Base
  belongs_to :company
  belongs_to :region
  has_many :employees
  #validates_uniqueness_of :dept_name
end

everything works just fine. What am I doing wrong?

Well first, you are posting to the wrong mailing list ;). You want the
Rails mailing list for this question. Second, I'm guessing that the
table column isn't actually dept_name (maybe a typo, dep_name, maybe you
actually spelled it out department_name, who knows). But that's just a
guess. I would suggest asking your question again on the rails list.

···

On Sun, Sep 24, 2006 at 03:10:06PM +0900, gpasley@gmail.com wrote: