Ben Vishny wrote: > Hi all! > > In my application I'm trying to create a model (Groups), which will > allow me to save groups of objects from various tables under a common > name. For example, one record in this table could refer to a group of > users. Another could refer to a group of photos. How should I do this? > When I use has_many_through I have to specify the group_id as well as > the id for whatever object I am referring to. But if the other id could > refer to a photo, or a user, or another model, how do I setup this kind > of inheritance? Do I have multiple foreign key fields in the table that > links the two together? EX: group_id, user_id, photo_id etc. and leave > the fields not being used blank. Or does this cause an error because > they are indexes? > > Best, > Ben
1. You should name the model like Group, not Groups 2. You should look for :polymorphic => true, somewhere like this: http://railscasts.com/episodes/154-polymorphic-association http://guides.rubyonrails.org/association_basics.html#polymorphic-associations or just type in Google "polymorphic association Rails", like this http://www.google.com.ua/search?hl=uk&client=firefox-a&rls=org.mozilla:en-US:official&hs=8kT&ei=z9lFSsb0MMG1sgby4MEM&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=polymorphic+association+Rails&spell=1 -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ 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 [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
