Hi, thanks for answer. My pb with polymorphic is that I would have to create first in db a ligne for ad_real_estate_details and then create my ad, what is non sense for me, in terms of logic. and it might brings some pb as I read there http://stackoverflow.com/questions/3969025/accepts-nested-attributes-for-with-belongs-to-polymorphic
lets have another example which is almost the same image we have Student (age, classe, ...) and Teacher (subject_taught) classes that inherit from User classes. I would be non sense to create first a Teacher entity, and then to link it to User, no ? Le lundi 28 janvier 2013 01:10:30 UTC+1, jim a écrit : > > > > > On Mon, Jan 28, 2013 at 6:27 AM, oto iashvili > <optimum...@laposte.net<javascript:> > > wrote: > >> hi, >> >> i' trying to re-create my project from php to rails. But now Im faced >> with a pb to witch I had solution with php, but I cant figure how to make >> it work with rails >> >> here my tables >> >> ads >> id >> category_id >> title >> text >> >> ad_real_estate_details >> id >> ad_id >> nb_room >> floor >> >> ad_car_details >> id >> ad_id >> color >> brand >> >> here what I succeed to do >> >> >> class Ad < ActiveRecord::Base >> attr_accessible :category_id :title, :text, :ad_real_estate_details >> has_one :ad_real_estate_details >> accepts_nested_attributes_for :ad_real_estate_details, allow_destroy: >> true >> end >> >> class AdRealEstateDetail < ActiveRecord::Base >> belongs_to :ad >> validates :ad_id, presence: true >> end >> >> but this only work for other category than real_estate >> >> so I was thinking of polymorphism, but polymorphism mean I should add a >> reference in my "ad" table to the detail tables, and remove annonce_id from >> detail tables , what I thing is non-sense as some ads can have no details, >> but details are non-sense without an ad. >> > > i think you have it right when you mentioned using polymorphic > associations. it is fine to leave the polymorphic association > nil if the ad has no details if that's what you're worried about. > > >> >> I was also thinking of a class AdDetails, and AdRealEstateDetail would >> inherite from it, but this is not possible with rails as all subclasses >> will share the same table >> >> does anyone have a solution for this kind of problem ? >> >> thanks >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Ruby on Rails: Talk" group. >> To post to this group, send email to >> rubyonra...@googlegroups.com<javascript:> >> . >> To unsubscribe from this group, send email to >> rubyonrails-ta...@googlegroups.com <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msg/rubyonrails-talk/-/GLpFbbHm0ogJ. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > > > > -- > ------------------------------------------------------------- > visit my blog at http://jimlabs.heroku.com > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscr...@googlegroups.com. To post to this group, send email to rubyonrails-talk@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msg/rubyonrails-talk/-/zT4pri8N4GUJ. For more options, visit https://groups.google.com/groups/opt_out.
