On Jun 8, 2012, at 8:04 AM, Erwin wrote: > when contents.state is NULL, then the record IS NOT selected > when contents.state is'' ( empty ) then the record is selected > ( obviously when set to any other value too..)
Yes, it's how SQL works--NULL is 'unknown', so comparison with any value returns null. You need a SQL primer, and look especially for three-valued logic. -- Scott Ribe [email protected] http://www.elevated-dev.com/ (303) 722-0567 voice -- 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.
