On 5 January 2012 02:53, Daisy Di <li...@ruby-forum.com> wrote: > i have two table, comment and post, both have composite keys, and no id > column, comment belongs to post, i follow the instruction of > http://compositekeys.rubyforge.org/, and it seems successfully, > (But i still cant confirm to put require 'rubygems' and > require 'composite_primary_keys' on which file ). > I can do the CRUD operation for post,then i want to create comment form, > in the _form.html.erb, the code likes below: > <%= form_for([@post, @post.comments.build]) do |f| %> > then i got an error,"unknown attribute: comment_id", > i think the build method need the parameter id which is default, but i > dont have this column,and i cant change any thing in the database,how to > resolve this problem?Thanks .
A way to resolve the problem is to stick to the rails conventions for id columns and so on. That is the best way unless you have a legacy database and *really* cannot change the schema. Colin -- 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 rubyonrails-talk@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
