时间.现在&created_at 有什么不同?Ruby on Rails [英] Time.now & Created_at are different? Ruby on Rails

问题描述

我的网站部署在 heroku 上.Time.now 将在今天返回，但记录的 created_at 字段(现在创建)将显示明天.我认为这与服务器时间有关?

My site is deployed on heroku. Time.now will return today, but the created_at field of a record (created right now) will say its tomorrow. I assume this has to do with server time?

有没有办法确保它们相同?最好的，艾略特

Is there a way to make sure they're the same? Best, Elliot

更新所以我做了这个heroku rake time:zones:us"

Update so I did this "heroku rake time:zones:us"

它给了我:

    * UTC -10:00 *
Hawaii

* UTC -09:00 *
Alaska

* UTC -08:00 *
Pacific Time (US & Canada)

* UTC -07:00 *
Arizona
Mountain Time (US & Canada)

* UTC -06:00 *
Central Time (US & Canada)

* UTC -05:00 *
Eastern Time (US & Canada)
Indiana (East)

但是，当我在我的环境中设置 config.time_zone = 'UTC -05:00' 时，应用程序无法启动.有什么想法吗?

however, when I set config.time_zone = 'UTC -05:00' in my environment, the app fails to start. any ideas?

推荐答案

Rails 总是在数据库中存储 UTC 时间；created_at 字段本身应该正好被您的时区相对于 UTC 的变化所抵消.

Rails always stores UTC time on the database; the created_at field by itself should be offset by exactly your timezone's variation relative to UTC.

每当您在应用程序中加载记录时，字段都会转换为 environment.rb 中指定的时区.它可能是这样的:

Whenever you load a record in your application, the fields get converted to the timezone specified in environment.rb. It might have something like this:

config.time_zone = 'UTC'

为了将时间正确转换为您的时区，您可以将此配置设置更改为与您的实际时区相匹配的设置.例如:

For the time to be converted properly to your timezone, you might change this configuration setting to one matching your actual time zone. For instance:

config.time_zone = 'Central Time (US & Canada)'

要查看可用区域，请在您的 rails 目录中发出rake -D time".这将为您提供有关如何获取用于配置的时区名称的说明.

To see available zones, issue "rake -D time" on your rails directory. This will give you instructions on how to get time zone names for use in configuration.

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