如何在 Rails 控制台中获得漂亮的格式 [英] How to get nice formatting in the Rails console

问题描述

我想让这样的东西看起来不错:

<代码>>>产品颜色.all=>[#<ProductColor id: 1, name: "White", internal_name: "White", created_at: "2009-06-10 04:02:44", updated_at: "2009-06-10 04:02:44">, #<ProductColor id: 2, name: "Ivory", internal_name: "Ivory", created_at: "2009-06-10 04:02:44", updated_at: "2009-06-10 04:02:44">, #, #]

这不起作用:

<代码>>>产品颜色.all.inspect=>"[#<ProductColor id: 1, name: \"White\", internal_name: \"White\", created_at: \"2009-06-10 04:02:44\", updated_at: \"2009-06-10 04:02:44\">, #<ProductColor id: 2, name: \"Ivory\", internal_name: \"Ivory\", created_at: \"2009-06-10 04:02:44\", updated_at: \"2009-06-10 04:02:44\">, #<ProductColor id: 3, name: \"Blue\", internal_name: \"Light Blue\", created_at: \"2009-06-10 04:02:44\", updated_at: \"2009-06-10 04:02:44\">, #]"

这也没有:

<代码>>>ProductColor.all.to_yaml=>"--- \n- !ruby/object:ProductColor \n 属性:\n 名称:White\n created_at: 2009-06-10 04:02:44\n updated_at: 2009-06-10 04:02:44\n id: \"1\"\n internal_name: White\n attributes_cache: {}\n\n- !ruby/object:ProductColor \n attributes: \n name: Ivory\n created_at: 2009-06-10 04:02:44\n updated_at: 2009-06-10 04:02:44\n id: \"2\"\n internal_name: Ivory\n attributes_cache: {}\n\n- !ruby/object:ProductColor \n 属性:\n 名称:蓝色\n created_at: 2009-06-10 04:02:44\n updated_at: 2009-06-10 04:02:44\n id: \"3\"\n internal_name: Light蓝色\n 属性缓存:{}\n\n- !ruby/object:ProductColor \n 属性:\n 名称:绿色\n created_at:2009-06-10 04:02:44\n updated_at:2009-06-1004:02:44\n id: \"4\"\n internal_name: Green\n attributes_cache: {}\n\n"

想法?

解决方案

y 方法是获得一些漂亮的 YAML 输出的便捷方法.

y ProductColor.all

假设您在 script/console

正如 jordanpg 评论的那样，这个答案已经过时了.对于 Rails 3.2+，您需要执行以下代码才能使 y 方法工作:

YAML::ENGINE.yamler = 'syck'

来自 ruby-docs<块引用>

在较旧的 Ruby 版本中，即.<= 1.9，仍然提供 Syck，但是它随着 Ruby 2.0.0 的发布，它被完全删除.

对于 rails 4/ruby 2，你可以只使用

放入 object.to_yaml

I want to get something like this to look nice:

>> ProductColor.all
=> [#<ProductColor id: 1, name: "White", internal_name: "White", created_at: "2009-06-10 04:02:44", updated_at: "2009-06-10 04:02:44">, #<ProductColor id: 2, name: "Ivory", internal_name: "Ivory", created_at: "2009-06-10 04:02:44", updated_at: "2009-06-10 04:02:44">, #<ProductColor id: 3, name: "Blue", internal_name: "Light Blue", created_at: "2009-06-10 04:02:44", updated_at: "2009-06-10 04:02:44">, #<ProductColor id: 4, name: "Green", internal_name: "Green", created_at: "2009-06-10 04:02:44", updated_at: "2009-06-10 04:02:44">]

This doesn't work:

>> ProductColor.all.inspect
=> "[#<ProductColor id: 1, name: \"White\", internal_name: \"White\", created_at: \"2009-06-10 04:02:44\", updated_at: \"2009-06-10 04:02:44\">, #<ProductColor id: 2, name: \"Ivory\", internal_name: \"Ivory\", created_at: \"2009-06-10 04:02:44\", updated_at: \"2009-06-10 04:02:44\">, #<ProductColor id: 3, name: \"Blue\", internal_name: \"Light Blue\", created_at: \"2009-06-10 04:02:44\", updated_at: \"2009-06-10 04:02:44\">, #<ProductColor id: 4, name: \"Green\", internal_name: \"Green\", created_at: \"2009-06-10 04:02:44\", updated_at: \"2009-06-10 04:02:44\">]"

And neither does this:

>> ProductColor.all.to_yaml
=> "--- \n- !ruby/object:ProductColor \n  attributes: \n    name: White\n    created_at: 2009-06-10 04:02:44\n    updated_at: 2009-06-10 04:02:44\n    id: \"1\"\n    internal_name: White\n  attributes_cache: {}\n\n- !ruby/object:ProductColor \n  attributes: \n    name: Ivory\n    created_at: 2009-06-10 04:02:44\n    updated_at: 2009-06-10 04:02:44\n    id: \"2\"\n    internal_name: Ivory\n  attributes_cache: {}\n\n- !ruby/object:ProductColor \n  attributes: \n    name: Blue\n    created_at: 2009-06-10 04:02:44\n    updated_at: 2009-06-10 04:02:44\n    id: \"3\"\n    internal_name: Light Blue\n  attributes_cache: {}\n\n- !ruby/object:ProductColor \n  attributes: \n    name: Green\n    created_at: 2009-06-10 04:02:44\n    updated_at: 2009-06-10 04:02:44\n    id: \"4\"\n    internal_name: Green\n  attributes_cache: {}\n\n"

Thoughts?

解决方案

The y method is a handy way to get some pretty YAML output.

y ProductColor.all

Assuming you are in script/console

As jordanpg commented, this answer is outdated. For Rails 3.2+ you need to execute the following code before you can get the y method to work:

YAML::ENGINE.yamler = 'syck'

From ruby-docs

In older Ruby versions, ie. <= 1.9, Syck is still provided, however it was completely removed with the release of Ruby 2.0.0.

For rails 4/ruby 2 you could use just

puts object.to_yaml

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