No doubt there are neater ways but you could define a named scope that finds all records where column1 is true, then in your validate method if column1 for the new record is true and if your named scope.count > 1 then add an error for column1. The named scope is not compulsory, it is just for tidiness.
You may have to worry about what happens if two people try to update the db at the same time though. I am not sure of the best way to solve that one. 2009/5/20 cardinallijr <[email protected]> > > Hi all, > > I'm trying to validate my model through equal values occuring a number > of times on the same column. I think that I have to use a custom > validation, right? I tried to use it but had no success. > > For example, that's the table: > > class MyTest < ActiveRecord::Migration > def self.up > create_table :mytest do |t| > t.column :name, :string > t.column :column1, :boolean > end > def self.down > drop_table :products > end > end > > What I need is that when 2 records on the table 'mytest' had column1 = > TRUE (1), and we try to insert a new record with this condition > (column1 = TRUE), an error to this field be added. Please, can you > help me to find a solution for this? Any hint for the model file > (mytest.rb)? > > > Thanks for the help. > > -- > Alberto > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
