问题
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?
回答1:
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As jordanpg commented, this answer is outdated.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
回答2:
You should try hirb. It's a gem made to to pretty format objects in the ruby console. Your script/console session would look like this:
>> 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
You can learn more about hirb at its homepage.
回答3:
Awesome print is nice too if you want an object indented. Something like:
$ 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
}
]
To integrate it by default with your irb/rails/pry console, add to your ~/.irbrc or ~/.pryrc file:
require "awesome_print"
AwesomePrint.irb! # just in .irbrc
AwesomePrint.pry! # just in .pryrc
回答4:
May also be noted that you can use:
j ProductColor.all.inspect
to output in Json format rather than Yaml
回答5:
>> puts ProductColor.all.to_yaml
Simply works fine!
Source: https://stackoverflow.com/a/4830096
回答6:
Hi you can also try this in your script/console if
>> y ProductColor.all
not working for you.
Try this:
>> require 'yaml'
>> YAML::ENGINE.yamler = 'syck'
then
>> y ProductColor.all
回答7:
I had some troubles making it work so I'll add my two cents to awesome_print
add this to your Gemfile, preferably in :development
gem 'awesome_print', require: 'ap'
then in
rails console
you can do
> ap Model.all
That's it. However you can also add
require "awesome_print"
AwesomePrint.irb!
to your ~/.irbrc, this way awesome_print will be required anytime you open the console and you can simply do
Model.all without the need of typing ap
回答8:
Use irbtools gem.
It will automatically format the the console output plus you'll get tons of great features.
回答9:
You might want to define ProductColor's inspect method to return something that you find nice. For example:
def inspect
"<#{id} - #{name} (#{internal_name})>"
end
After which the result of ProductColor.all will display as something like [<1 - White (White)>, ...]. Of course you should adjust the inspect method to your needs, so that it displays all the information you need in a style that you like.
Edit: also if the issue was the lack of line breaks in the output, you might try
require 'pp'
pp ProductColor.all
which should insert linebreaks where appropriate
回答10:
You may also try the following for a group of objects
Object.all.map(&:attributes).to_yaml
This will give you much nicer output, like
---
id: 1
type: College
name: University of Texas
---
id: 2
type: College
name: University of California
Calling to_yaml on attributes rather than the object itself saves you from viewing the full contents of the object in the output
Or puts Object.last.attributes.to_yaml for a single object
Shorthand is also available: y Object.last.attributes
回答11:
To add to Alter Lago's suggestion for using AwesomePrint, If you can't/shouldn't/don't want to add the awesome_print gem to your project's Gemfile, do this:
gem install awesome_print
Edit ~/.irb.rc and add this:
$LOAD_PATH << '/Users/your-user/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/gems/1.9.1/gems/awesome_print-1.1.0/lib'
require 'awesome_print'
(Making sure the path and version are correct, of course)
回答12:
I think this solution is the most accurate one. You should try this:
puts JSON.pretty_generate Entry.all.map(&:attributes)
This will give you a super nice output compare to YAML format:
[
{
"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"
}
]
来源：https://stackoverflow.com/questions/1224525/how-to-get-nice-formatting-in-the-rails-console