如何使用 Active Support 核心扩展

发布于 2024-10-03 19:04:24 字数 286 浏览 0 评论 0原文

我安装了 Active Support 3.0.3 和 Rails 3.0.3 以及 Ruby 1.8.7。

当我尝试使用 1.week.ago 时，我发现

NoMethodError: undefined method 'week' for 1:Fixnum
from (irb):2

其他核心扩展似乎可以工作。我在朋友的计算机上尝试过（他的安装规格和旧版本相同），结果相同。

什么给？

所有这些都在 IRB 中。

原文

I have Active Support 3.0.3 installed and Rails 3.0.3 with Ruby 1.8.7.

When I try to use 1.week.ago I get

NoMethodError: undefined method 'week' for 1:Fixnum
from (irb):2

The other core extensions seem to work. I tried it on a friend's computer (same install specs and legacy versions are on his) with the same results.

What gives?

All of this is in IRB.

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凑诗 2024-10-10 19:04:24

由于使用 Rails 应该自动处理这个问题，因此我假设您正在尝试将 Active Support 添加到非 Rails 脚本中。

请阅读“如何加载核心扩展”。

Active Support 的方法在 Rails 3 中被分成更小的组，因此我们最终不会通过简单的 require 'activesupport' 加载大量不需要的内容。现在我们必须做一些事情，比如

require 'active_support/core_ext/object/blank'

如果你不关心粒度，你可以选择加载更大的块。如果你想一口气吞下所有东西，请使用...

对于 1.9.2：

rvm 1.9.2
irb -f
irb(main):001:0> require 'active_support/all'
=> true
irb(main):002:0> 1.week.ago
=> 2010-11-14 17:56:16 -0700
irb(main):003:0>

对于 1.8.7：

rvm 1.8.7
irb -f
irb(main):001:0> require 'rubygems'
=> true
irb(main):002:0> require 'active_support/all'
=> true
irb(main):003:0> 1.week.ago
=> Sun Nov 14 17:54:19 -0700 2010
irb(main):004:0>

Since using Rails should handle this automatically I'm going to assume you're trying to add Active Support to a non-Rails script.

Read "How to Load Core Extensions".

Active Support's methods got broken into smaller groups in Rails 3, so we don't end up loading a lot of unneeded stuff with a simple require 'activesupport'. Now we have to do things like

require 'active_support/core_ext/object/blank'

If you don't care about granularity, you can choose to load bigger chunks. If you want everything in one big gulp use...

For 1.9.2:

rvm 1.9.2
irb -f
irb(main):001:0> require 'active_support/all'
=> true
irb(main):002:0> 1.week.ago
=> 2010-11-14 17:56:16 -0700
irb(main):003:0>

For 1.8.7:

rvm 1.8.7
irb -f
irb(main):001:0> require 'rubygems'
=> true
irb(main):002:0> require 'active_support/all'
=> true
irb(main):003:0> 1.week.ago
=> Sun Nov 14 17:54:19 -0700 2010
irb(main):004:0>

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热鲨 2024-10-10 19:04:24

您可以通过已经提到的精细添加库

require 'active_support/core_ext/some_class/some_file'

还有另一个级别，您可以

require 'active_support/core_ext/some_class'

但是，目前，不幸的是，这不适用于 Time、Date 和 日期时间。

解决这个问题的方法是require 'active_support/time'，它将为您提供Time、Date和DateTime，其中将解决OP所要求的而不需要一切。

我的 Rails 补丁，其中添加了 active_support/core_ext /date 和 date_time 已纳入 Rails v4.0.0，因此现在您可以单独需要它们。耶！

You can granularly add libraries via the already mentioned

require 'active_support/core_ext/some_class/some_file'

There is also another level up where you can

require 'active_support/core_ext/some_class'

But, at the moment, this is unfortunately not available for Time, Date and DateTime.

A way around this is to require 'active_support/time' which will give you Time, Date and DateTime which would solve the OP was asking for without requiring everything.

My Rails patch, which adds active_support/core_ext/date and date_time, made it into Rails v4.0.0, so now you can require these individually. YAY!

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维持三分热 2024-10-10 19:04:24

就我而言，以下链接有效：

https://bundler.io/blog/2019/01/04/an-update-on-the-bundler-2-release.html

$ cat Gemfile.lock | grep -A 1 "BUNDLED WITH"
BUNDLED WITH
   1.17.3

$ gem install bundler -v '1.17.3'

In my case the following link worked:

https://bundler.io/blog/2019/01/04/an-update-on-the-bundler-2-release.html

$ cat Gemfile.lock | grep -A 1 "BUNDLED WITH"
BUNDLED WITH
   1.17.3

$ gem install bundler -v '1.17.3'

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寄离 2024-10-10 19:04:24

您可以：
需要“active_support/core_ext”
或：
需要“active_support/all”

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长安忆 2024-10-10 19:04:24

这可以在控制台上运行吗？这对我有用：

$ sw_vers
ProductName:    Mac OS X
ProductVersion: 10.6.5
BuildVersion:   10H574

$ rails c
Loading development environment (Rails 3.0.3)
>> 1.week.ago
=> Sun, 14 Nov 2010 16:57:18 UTC +00:00

Does this work from the console? This is working for me:

$ sw_vers
ProductName:    Mac OS X
ProductVersion: 10.6.5
BuildVersion:   10H574

$ rails c
Loading development environment (Rails 3.0.3)
>> 1.week.ago
=> Sun, 14 Nov 2010 16:57:18 UTC +00:00

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