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
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
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