Ruby:从Ruby生成Google？

Question

这是一个模型blog。

# id  :bigint(8)
#  created_at                  :datetime         not null
#  updated_at                  :datetime         not null

class Blog < ApplicationRecord

end

我想将模型的created_at和updated_at转换为google

blog = Blog.first
blog.created_at

如何在生成原型消息时将DateTime转换为google？

Answer 1

库有方法可以做到这一点：

require 'google/protobuf/well_known_types'

# Convert ruby Time to protobuf value
time = Time.current
Google::Protobuf::Timestamp.new.from_time(time)

# Convert protobuf value to ruby Time
data = {:nanos=>801877000, :seconds=>1618811494}
Google::Protobuf::Timestamp.new(data).to_time

请参阅：L74#L74-L97

Answer 2

如果您正在使用Rails，您可以使用以下方式：

## Convert Ruby DateTime to Google::Protobuf::Timestamp
time = DateTime.now
seconds = time.to_i
nanos = time.nsec
gpt = Google::Protobuf::Timestamp.new(seconds: seconds, nanos: nanos)


## Convert Google::Protobuf::Timestamp to ruby DateTime
micros = gpt.nanos / 10 ** 3
time2 = Time.at(gpt.seconds, micros)

参考文献

1. ActiveSupport: DateTime#nsec
2. 堆栈溢出:如何将google.protobuf.Timestamp转换为Ruby DateTime对象？