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...have the tag already in the DB and just want to link it to another problem it does not really like me. I do it like this: self.tags << Tag.find_by_name(tag) I get the following error: Mysql::Error: Duplicate entry ''20'' for key 1: INSERT INTO problems_tags (`tag_id`, `problem_id`, `id`) VALUES (20, 33, 20) The problem is basically that it is trying to create a row in problem_tags with an ''id'' that already exists. How come it is trying to do that? How can I prevent it from doing that? Thanks for your help guys and gals! John Kopanas http://www.ko...

I have one table that stores data related to math problems, and another table that stores users'' answers to those problems. To make this very simple, we''ll say that the math table has two numbers that get subtracted, and the answers table has a field that can either be "pos" or "neg" math _____ 2 5 8 3 Okay so if we do the math, we know that the

Hi begin ActiveRecord::Base.transaction do pb_status_history = ProblemStatusHistory.new pb_status_history.problem_id = @problem.id pb_status_history.problem_status_id = @problem.problem_status_id pb_status_history.save! ret_val=@problem.update_attribute("problem_status_id",''ab'') if ret_val==false raise ActiveRecord::ActiveRecordError...

...quot;, :datetime end create_table "tags" do |t| t.column "name", :string t.column "created_at", :datetime t.column "updated_at", :datetime end create_table "problems_tags" do |t| t.column "problem_id", :integer t.column "tag_id", :integer end ==== Now, from the console I do the following: ==== problem = Problem.find(1) problem.tags.create :name => "test this tag" ==== The problem is that a row is added to the Tags table but nothing is added to the...

Hi, I would like to know how to populate data in another text fields on selection from a drop down For Ex 1) The form contains 4 fields out of which 3 are text fields and the 4th one is drop down list. 1) i would like to know how to populate the 3 text fields with data simultaneously on selection from the drop down list. Please Help. -- Posted via http://www.ruby-forum.com/.