Ruby-on-rails 格式化时间戳
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Formatting timestamps
提问by alamodey
How do you format Rails timestamps in a more human-readable format? If I simply print out created_ator updated_atin my view like this:
您如何以更易于阅读的格式格式化 Rails 时间戳？如果我只是打印出来created_at或updated_at在我看来是这样的：
<% @created = scenario.created_at %>
Then I will get:
然后我会得到：
2009-03-27 23:53:38 UTC
2009-03-27 23:53:38 UTC
回答by Greg Campbell
The strftime(from Ruby's Time) and to_formatted_s(from Rails' ActiveSupport) functions should be able to handle all of your time-formatting needs.
将strftime（从Ruby的时间）和to_formatted_s（从Rails的的ActiveSupport）函数应该能够处理所有的时间格式化的需求。
回答by acw
回答by wildDAlex
Also
还
<%= l scenario.created_at, :format => :sample) %>
And in locales/en.yml(depending of language)
并在 locales/en.yml（取决于语言）
en:
time:
formats:
sample: '%d.%m.%Y'
To learn more, see - http://guides.rubyonrails.org/i18n.html
要了解更多信息，请参阅 - http://guides.rubyonrails.org/i18n.html
回答by Devaroop
Time.now().to_i works great. For reverse conversion use Time.at(argument)
Time.now().to_i 效果很好。对于反向转换使用 Time.at(argument)
回答by ekauffmann
You can use strftimeto format the timestamp in many ways. I prefer some_data[:created_at].strftime('%F %T'). %Fshows "2017-02-08" (Calendar date extended), and %Tshows "08:37:48" (Local time extended).
您可以使用strftime多种方式来格式化时间戳。我更喜欢some_data[:created_at].strftime('%F %T')。%F显示“2017-02-08”（日历日期延长），并%T显示“08:37:48”（当地时间延长）。
For timezone issues, add this lines to your config/application.rbfile
对于时区问题，将此行添加到您的config/application.rb文件中
config.time_zone = 'your_timezone_string'
config.active_record.default_timezone = :local
回答by user3803150
you have to modify the timestamp file, in my case this file is located in /usr/local/rvm/gems/ruby-2.0.0-p195/gems/activerecord-4.2.0/lib/active_record/timestamp.rb. You must search for this line:
您必须修改时间戳文件，在我的情况下，此文件位于/usr/local/rvm/gems/ruby-2.0.0-p195/gems/activerecord-4.2.0/lib/active_record/timestamp.rb. 您必须搜索此行：
self.class.default_timezone == :utc ? Time.now.utc : Time.now
and change it to this:
并将其更改为：
self.class.default_timezone == :utc ? Time.now.utc : Time.now.strftime('%Y-%m-%d %H-%M-%S')
The trick is to modify the format with the strftimemethod, you can change the format if you want.
诀窍是使用strftime方法修改格式，您可以根据需要更改格式。
Now rails will use your format to update the "updated_at" column.
现在 rails 将使用您的格式来更新“updated_at”列。
