Question

可以在：after回调中产生项目吗？当我执行下面的代码时，我得到了LocalJumpException

app.get('/incidents/all', function(req, res){
    let data = globals.dataTopdesk;
    let output = {}
    Promise.all([
        data.length,
        calculateProcessingStatus(data),
        calculateOnHold(data),
        calculateOpen(data),
        calculateStatus(data),
        calculateCallType(data);
    ])
    .then(function(values) {
        output.all = values[0]
        output.processingStatus = values[1],
        output.onHold = values[2],
        output.open = values[3],
        output.status = values[4],
        output.callType = values[5]
        return output;
    })
    .then(function(output) {
        console.log('1')
        return new Promise(resolve=> {
            output.today = getToday(db, output)
            resolve(output);
        })
    })
    .then(function(output) {
        console.log('2')
        res.send(output)
    })
    .catch (function(err) {
        res.send('failed: ' + err)
    })
})

Answer 1

由于aasm丢弃了传递给事件调用的代码块，因此开箱即用是不可能的，但是，它是红宝石。

require 'aasm'
class TestClass
  include AASM
  aasm do
    state :created, initial: true
    state :running
    event :run do
      transitions from: :created,
      to: :running,
      after: -> { @λ_run.call(1) if @λ_run } # invoke the code block if was passed
    end
  end
end
TestClass.prepend(Module.new do
  def run!(*args, &λ)
    @λ_run = λ # store the code block passed to the method
    super
  end
end)
TestClass.new.run! { |v| puts v.inspect }

通过一些元编程，应该很容易扩展到所有已定义的事件处理程序。

回调后AASM中的收益项目

1 个答案: