I have set my float id's. I have a Rails 3.0 app and using a MySQL database. It seemed to work fine on a Postgres database. Here is my problem: irb(main):033:0> Patient.first *Patient Load (1.3ms)* SELECT `patients`.* FROM `patients` LIMIT 1 => #<Patient pid: 29312000.0, created_at: "2014-04-25 19:05:10", updated_at: "2014-04-25 19:05:10", race: "WHITE", ethnicity: "NOT HISPANIC", age: 47> irb(main):034:0> Patient.find_by_pid(Patient.first.pid) *Patient Load (1.1ms)* *SELECT `patients`.* FROM `patients` LIMIT 1* *Patient Load (346.1ms)* SELECT `patients`.* FROM `patients` WHERE `patients`.`pid` = 29312000.0 LIMIT 1 => nil Basically, I can not use where I have used Float as a part of an Active Record Query. Another similar problem on another model. irb(main):035:0> Lab.first *Lab Load (1.3ms)* *SELECT `labs`.* FROM `labs` LIMIT 1* => #<Lab id: 1, patient_id: 29312000.0, code_id: 1, lab_date: "2010-11-29", value: 51, age: 47, created_at: "2014-04-25 19:05:10", updated_at: "2014-04-25 19:05:10", difference: 12, report_id: 2432930000.0> irb(main):036:0> Lab.find_by_patient_id(Lab.first.patient_id) *Lab Load (1.2ms)* SELECT `labs`.* FROM `labs` LIMIT 1 *Lab Load (341.4ms)* *SELECT `labs`.* FROM `labs` WHERE `labs`.`patient_id` = 29312000.0 LIMIT 1* -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/c3009ec3-2990-44ab-960e-caa75658b3b9%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.