From: Rick DeNatale <rick.denatale@...>
Date: 2007-12-07T23:45:38+09:00
Subject: Re: help with has_and_belongs_to_many

On 12/7/07, Junkone <junkone1@gmail.com> wrote:

> i get error when assigning many to many relationship
> >> a=Trade.find(1)
> => #<Trade:0x477f4bc @attributes={"tradestatus"=>"O", "size"=>nil,
> "mfe"=>nil, "
> tradestrategy"=>nil, "symbol_alias"=>"PRGX", "tradeinterval"=>"DAILY",
> "getpictu
> res"=>nil, "tradename"=>nil, "id"=>"1", "mae"=>nil,
> "grossrevenue"=>nil, "tradec
> omments"=>nil, "tradedirection"=>"Short"}>
> >> z=Tag.find(1)
> => #<Tag:0x4779044 @attributes={"id"=>"1", "description"=>"exampe1"}>
> >> a.tags=z
> NoMethodError: undefined method `each' for #<Tag:0x4779044>
>         from e:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/

You don't replace a habtm relationship with an assignment, you add to it

    a.tags << z

-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/