如何在Rails控制台中获得良好的格式

Question

我希望得到这样的东西看起来不错:

>> 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">]

这不起作用:

>> 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\">]"

这也不是:

>> 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"

思考？

Answer 1

该y方法是获得一些漂亮的YAML输出的便捷方法.

y ProductColor.all

假设你在 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方法起作用:

YAML::ENGINE.yamler = 'syck'

来自ruby-docs

在较旧的Ruby版本中,即.<= 1.9,仍然提供Syck,但随着Ruby 2.0.0的发布,它已被完全删除.

对于rails 4/ruby​​ 2,您可以使用

puts object.to_yaml

Answer 2

你应该试试hirb.它是一个宝石,用于在ruby控制台中对漂亮的格式化对象.您的脚本/控制台会话将如下所示:

>> require 'hirb'
=> true
>> Hirb.enable
=> true
>> ProductColor.first
+----+-------+---------------+---------------------+---------------------+
| id | name  | internal_name | created_at          | updated_at          |
+----+-------+---------------+---------------------+---------------------+
| 1  | White | White         | 2009-06-10 04:02:44 | 2009-06-10 04:02:44 |
+----+-------+---------------+---------------------+---------------------+
1 row in set
=> true

您可以在其主页上了解有关hirb的更多信息.

Answer 3

如果你想要一个缩进的对象,真棒印刷也很好.就像是:

$ rails console
rails> require "awesome_print"
rails> ap Account.all(:limit => 2)
[
    [0] #<Account:0x1033220b8> {
                     :id => 1,
                :user_id => 5,
            :assigned_to => 7,
                   :name => "Hayes-DuBuque",
                 :access => "Public",
                :website => "http://www.hayesdubuque.com",
        :toll_free_phone => "1-800-932-6571",
                  :phone => "(111)549-5002",
                    :fax => "(349)415-2266",
             :deleted_at => nil,
             :created_at => Sat, 06 Mar 2010 09:46:10 UTC +00:00,
             :updated_at => Sat, 06 Mar 2010 16:33:10 UTC +00:00,
                  :email => "info@hayesdubuque.com",
        :background_info => nil
    },
    [1] #<Account:0x103321ff0> {
                     :id => 2,
                :user_id => 4,
            :assigned_to => 4,
                   :name => "Ziemann-Streich",
                 :access => "Public",
                :website => "http://www.ziemannstreich.com",
        :toll_free_phone => "1-800-871-0619",
                  :phone => "(042)056-1534",
                    :fax => "(106)017-8792",
             :deleted_at => nil,
             :created_at => Tue, 09 Feb 2010 13:32:10 UTC +00:00,
             :updated_at => Tue, 09 Feb 2010 20:05:01 UTC +00:00,
                  :email => "info@ziemannstreich.com",
        :background_info => nil
    }
]

在默认情况下你的IRB /导轨/撬控制台整合它,添加到您的~/.irbrc或~/.pryrc文件:

require "awesome_print"
AwesomePrint.irb! # just in .irbrc
AwesomePrint.pry! # just in .pryrc

Answer 4

也可以注意到你可以使用:

j ProductColor.all.inspect

以Json格式而不是Yaml输出

Answer 5

>> puts ProductColor.all.to_yaml

干得好!

资料来源:https://stackoverflow.com/a/4830096

Answer 6

我认为这个解决方案是最准确的。你应该试试这个：

puts JSON.pretty_generate Entry.all.map(&:attributes)

与 YAML 格式相比，这将为您提供非常好的输出：

[
  {
    "id": 44,
    "team_id": null,
    "member_id": 1000000,
    "match_id": 1,
    "created_at": "2019-04-09 15:53:14 +0900",
    "updated_at": "2019-04-09 15:53:14 +0900"
  },
  {
    "id": 45,
    "team_id": null,
    "member_id": 1000001,
    "match_id": 1,
    "created_at": "2019-04-09 15:53:36 +0900",
    "updated_at": "2019-04-09 15:53:36 +0900"
  },
  {
    "id": 46,
    "team_id": null,
    "member_id": 1000003,
    "match_id": 1,
    "created_at": "2019-04-09 15:56:40 +0900",
    "updated_at": "2019-04-09 15:56:40 +0900"
  },
  {
    "id": 47,
    "team_id": null,
    "member_id": 1000004,
    "match_id": 1,
    "created_at": "2019-04-09 15:56:48 +0900",
    "updated_at": "2019-04-09 15:56:48 +0900"
  }
]

Answer 7

嗨,您也可以在脚本/控制台中尝试这个

>> y ProductColor.all

不适合你.

试试这个:

>> require 'yaml'

>> YAML::ENGINE.yamler = 'syck'

然后

>> y ProductColor.all

Answer 8

我有一些麻烦使它工作,所以我将我的两美分添加到awesome_print添加到你的Gemfile,最好是 :development

gem 'awesome_print', require: 'ap'

然后在

rails console

你可以做

> ap Model.all 而已.但是你也可以添加

require "awesome_print"
AwesomePrint.irb!

到你的〜/ .irbrc,这样一来打开控制台就会需要awesome_print,你可以简单地做

Model.all无需输入ap

Answer 9

您也可以针对一组对象尝试以下操作

Object.all.map(&:attributes).to_yaml

这会给你更好的输出，比如

---
id: 1
type: College
name: University of Texas
---
id: 2
type: College
name: University of California

调用to_yaml属性而不是对象本身可以避免在输出中查看对象的完整内容

或者puts Object.last.attributes.to_yaml对于单个对象

速记也可用： y Object.last.attributes

Answer 10

使用irbtools宝石.

它会自动格式化控制台输出,你会得到很多很棒的功能.