Problems with master-detail relationship

I have two tables. Let say headers and details.

On headers_controller.rb I have

  has_many :details

On details_controller.rb I have

  belongs_to :header

I have in my model for header (just for testing):

def list
  @headers = Headers.sort( "headers.kind ASC")
end

So when i run after loading the proper data a header.details.size it
returns me the number of details for the selected header.

But when I try to display header.details.size in a list view for the
headers I get an arror saying
  "Unrecognized constant Header::Detail"

I try to get this in the list with:

  <%= header.details.size %>

What am I doing wrong?

I have two tables. Let say headers and details.

On headers_controller.rb I have

has_many :details

That should be in the model not the controller

On details_controller.rb I have

belongs_to :header

ditto

I have in my model for header (just for testing):

This should be in the controller

def list
@headers = Headers.sort( "headers.kind ASC")

That should be Header (singular)

I have two tables. Let say headers and details.

On headers_controller.rb I have

has_many :details

That should be in the model not the controller

On details_controller.rb I have

belongs_to :header

ditto

I have in my model for header (just for testing):

This should be in the controller

def list
@headers = Headers.sort( "headers.kind ASC")

That should be Header (singular)

Also it should be order not sort

Colin