如何将某些内容转换为Ruby Proc？

if j.job_type_name
  j.type = j.job_type_name
elsif j.type.length > 1
  # jty = Jobtype.find_by_id(j.type)
  # We don't want to relentlessly hit the db for JobTypes, Colors, Priorities, etc. so we use the stored 'all' variable
  jty = allJobTypes.find { |h| h['_id'] == BSON::ObjectId(j.type) }
  j.type = jty && jty.job_type ? jty.job_type : 'N/A'
end

if j.priority_name
  j.priority = j.priority_name
elsif j.priority
  pri = Jobpriority.find_by_id(j.priority)
  j.priority = !pri.blank? && !pri.job_priority.blank? ? pri.job_priority : 'N/A'
end
if j.job_type_name
  j.type = j.job_type_name
e