public function rules()
{
// NOTE: you should only define rules for those attributes that
// will receive user inputs.
return array(array('drug_id decisiontree_id, available, contraindications_required, decisiontree_id, template_code, intervention_name,
dose_and_frequency, administration_route, cost, cost_type_id, monitoring_frequency, monitoring_frequency_period_id,
duration, toxicity', 'safe'), array('drug_id contraindications_required, intervention_name, dose_and_frequency,
administration_route, cost, cost_type_id, monitoring_frequency, monitoring_frequency_period_id,
duration, toxicity', 'required'), array('id, drug_id, available, contraindications_required', 'safe', 'on' => 'search'));
}