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A more useful rule, to fetch the patient's age, would be:
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return new Result(context.getPatient(patientId).getAge(context.indexDate)) |
Here's a verbose version of that same age logic
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/* * In order to add as little overhead as possible, allowing rules to be run relatively efficiently on very large * cohorts, the rule framework does not automatically provide us with a Patient object, but just a patientId. * This line fetches that Patient object. (It actually fetches all patients in the cohort the rule is being evaluated * on.) */ def patient = context.getPatient(patientId) /* * We want this rule to work correctly if you evaluate it as-of some other date. So we fetch the index date from * the LogicContext. "context.indexDate" is groovy shorthand for "context.getIndexDate()" */ def age = patient.getAge(context.indexDate) /* * We need to wrap our returned value in a logic Result. */ return new Result(age) |
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