Associations Problem

Hi guys,
I’m having a strange error in one of my model relationships and it’s
driving me crazy

I have:
class Target < ActiveRecord::Base
has_many :sections
end

class Section < ActiveRecord::Base
belongs_to :target
has_many :line_items
end

class LineItem < ActiveRecord::Base
belongs_to :section
end

When I do the following in script/console:
s = LineItem.last.section (s.id is 21, as is LineItem.last.section_id as
well)
s.target

I get the Section instance, and the logger shows no query to the
targets table. However, if I do:
s = Section.find(21)
s.target

I get the right Target instance.

Even more strange is that if I do:
s = LineItem.last.section
s.target.target (twice the target message)

I get the right Target instance.

I’m using Rails 2.3.5 and I’m getting this warning, but I’m not sure
if it has something to do with it:
vendor/rails/activerecord/lib/active_record/associations/association_proxy.rb:217:
warning: default `to_a’ will be obsolete

Any clue?

Thanx a lot in advance.


Leonardo M…
There’s no place like ~

On Jul 19, 9:26 pm, Leonardo M. [email protected] wrote:

Even more strange is that if I do:
s = LineItem.last.section
s.target.target (twice the target message)

I get the right Target instance.

If you do some_line_item.section what you get back isn’t a section but
an association proxy. If you do anything that actually requires the
section object, active record will load it and send the method calls
to it. Unfortunately for you the method on association proxy that
returns the actual object for the association is called target.

Fred

On 19 July 2010 22:09, Frederick C. [email protected]
wrote:

s = Section.find(21)

If you do some_line_item.section what you get back isn’t a section but
an association proxy. If you do anything that actually requires the
section object, active record will load it and send the method calls
to it. Unfortunately for you the method on association proxy that
returns the actual object for the association is called target.

See http://wiki.rubyonrails.org/rails/pages/ReservedWords for more
words you can’t use.

Colin

On Tue, Jul 20, 2010 at 4:46 AM, Colin L. [email protected]
wrote:

targets table. However, if I do:

If you do some_line_item.section what you get back isn’t a section but
an association proxy. If you do anything that actually requires the
section object, active record will load it and send the method calls
to it. Unfortunately for you the method on association proxy that
returns the actual object for the association is called target.
Thanks a lot, Frederick. Just the words I needed.

See http://wiki.rubyonrails.org/rails/pages/ReservedWords for more
words you can’t use.
Thanks Colin!, great tip! I didn’t know this.


Leonardo M…
There’s no place like ~

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