延迟作业：与变量执行时间handle_asynchronously

Question

我希望在X秒后运行延迟功能。 X由对象的字段确定。

我试过了：

# after_create this function is triggered
def save_distance
    update_attribute :distance, 5
end

# function gets delayed by X seconds (X = field named "timespan" of my object)
handle_asynchronously :save_distance, :run_at => Proc.new { timespan.seconds.from_now }

但它不起作用，返回：

undefined local variable or method `timespan' for #<Class:0x007f9b9d4f4c88>

怎么做？

Answer 1

您需要将参数传递给proc

handle_asynchronously :save_distance, :run_at => Proc.new {|object| object.timespan.seconds.from_now }