blocks|key|1333500|text|在视图中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1333501|include+DebugHelper

...your+code...

debug(object)|code-block|syntax|javascript|1333502|在控制器、模型和其他代码中：|1333503|puts+YAML::dump(object)|1333504|Source|offset|length|1333505|entityMap|0|LINK|mutability|MUTABLE|url|http://source.mihelac.org/2006/3/31/ruby-rails-alternative-to-php-print_r-and-var_dump^0|0|0|0|0|0|6|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|10|8|@]|9|@$M|11|N|12|1|13]]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

In views:

<pre><code>include DebugHelper

...your code...

debug(object)
</code></pre>

In controllers, models, and other code:

<pre><code>puts YAML::dump(object)
</code></pre>

<a href="http://source.mihelac.org/2006/3/31/ruby-rails-alternative-to-php-print_r-and-var_dump" rel="noreferrer">Source</a>

blocks|key|1333552|text|任何对象的.inspect方法的格式都应该正确显示，只需这样做即可。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1333553|<%25=+theobject.inspect+%25>|code-block|syntax|javascript|1333554|.methods方法也可能有用：|1333555|<%25=+theobject.methods.inspect+%25>|1333556|根据数据的不同，将其放入<pre>标记可能会有所帮助|1333557|entityMap^0|5|8|0|0|0|8|0|0|C|5|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|R|$]]

The <code>.inspect</code> method of any object should format is correctly for display, just do..

<pre><code>&lt;%= theobject.inspect %&gt;
</code></pre>

The <code>.methods</code> method may also be of use:

<pre><code>&lt;%= theobject.methods.inspect %&gt;
</code></pre>

It may help to put that in <code>&lt;pre&gt;</code> tags, depending on the data

blocks|key|1333630|text|如果只想将相关数据显示到标准输出(如果从命令行运行，则是终端输出)，可以使用p+some_object。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1333631|entityMap^0|12|D|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

If you just want the relevant data to be displayed to stdout (the terminal output if you're running from the command line), you can use <code>p some_object</code>.

blocks|key|1333672|text|在视图中，您可以使用<%25=+debug(yourobject)+%25>，它将生成数据的YAML视图。如果你想在你的日志中记录一些东西，你应该使用logger.debug+yourobject.inspect。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1333673|entityMap^0|A|O|1Z|V|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

In a view you can use <code>&lt;%= debug(yourobject) %&gt;</code> which will generate a YAML view of your data. If you want something in your log you should use <code>logger.debug yourobject.inspect</code>.

blocks|key|1333720|text|我使用这个:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1333721|require+'yaml'

module+AppHelpers
++module+Debug
++++module+VarDump

++++++class+<<+self

++++++++def+dump(dump_object,+file_path)
++++++++++File.open+file_path,+"a%2B"+do+%7Clog_file%7C
++++++++++++current_date+=+Time.new.to_s+%2B+"\n"+%2B+YAML::dump(dump_object)+%2B+"\n"
++++++++++++log_file.puts+current_date
++++++++++++log_file.close
++++++++++end
++++++++end

++++++end

++++end
++end
end|code-block|syntax|javascript|1333722|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I use this :)

<pre><code>require 'yaml'

module AppHelpers
 module Debug
 module VarDump

 class &lt;&lt; self

 def dump(dump_object, file_path)
 File.open file_path, "a+" do |log_file|
 current_date = Time.new.to_s + "\n" + YAML::dump(dump_object) + "\n"
 log_file.puts current_date
 log_file.close
 end
 end

 end

 end
 end
end
</code></pre>

blocks|key|1549395|text|最近我成了PRY的粉丝，我发现它非常适合做像检查变量，调试运行代码和检查外部代码这样的事情。作为对这个特定问题的回答，它可能有点夸张。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1549396|entityMap|0|LINK|mutability|MUTABLE|url|http://pryrepl.org/^0|5|3|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Recently I have become a fan of <a href="http://pryrepl.org/" rel="nofollow">PRY</a>, I've found it incredibly for doing things like inspecting variables, debugging running code and inspecting external code. It might be a little overkill as an answer to this specific question.

blocks|key|1549418|text|您可以使用puts+some_variable.inspect。或者简称为：p+some_variable。为了获得更美观的输出，您可以使用awesome_print+gem。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1549419|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/michaeldv/awesome_print^0|5|Q|12|F|1Y|H|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]]|E|$]]|$1|F|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

You can use <code>puts some_variable.inspect</code>. Or the shorter version: <code>p some_variable</code>. And for prettier output, you can use the <a href="https://github.com/michaeldv/awesome_print" rel="noreferrer">awesome_print gem</a>.

blocks|key|1549500|text|前面的答案很好，但是如果您不想使用控制台(终端)，在Rails中，您可以使用调试的帮助程序ActionView::Helpers::DebugHelper在视图中打印结果|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1549501|#app/view/controllers/post_controller.rb
def+index
+@posts+=+Post.all
end

#app/view/posts/index.html.erb
<%25=+debug(@posts)+%25>

#start+your+server
rails+-s|code-block|syntax|javascript|1549502|结果(在浏览器中)|1549503|-+!ruby/object:Post
++raw_attributes:
++++id:+2
++++title:+My+Second+Post
++++body:+Welcome!++This+is+another+example+post
++++published_at:+'2015-10-19+23:00:43.469520'
++++created_at:+'2015-10-20+00:00:43.470739'
++++updated_at:+'2015-10-20+00:00:43.470739'
++attributes:+!ruby/object:ActiveRecord::AttributeSet
++++attributes:+!ruby/object:ActiveRecord::LazyAttributeHash
++++++types:+&5
++++++++id:+&2+!ruby/object:ActiveRecord::Type::Integer
++++++++++precision:+
++++++++++scale:+
++++++++++limit:+
++++++++++range:+!ruby/range
++++++++++++begin:+-2147483648
++++++++++++end:+2147483648
++++++++++++excl:+true
++++++++title:+&3+!ruby/object:ActiveRecord::Type::String
++++++++++precision:+
++++++++++scale:+
++++++++++limit:+
++++++++body:+&4+!ruby/object:ActiveRecord::Type::Text
++++++++++precision:+
++++++++++scale:+
++++++++++limit:+
++++++++published_at:+!ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter
++++++++++subtype:+&1+!ruby/object:ActiveRecord::Type::DateTime
++++++++++++precision:+
++++++++++++scale:+
++++++++++++limit:+
++++++++created_at:+!ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter
++++++++++subtype:+*1
++++++++updated_at:+!ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter
++++++++++subtype:+*1|1549504|entityMap|0|LINK|mutability|MUTABLE|url|http://api.rubyonrails.org/classes/ActionView/Helpers/DebugHelper.html^0|19|W|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

Prrevious answers are great but if you don't want to use the console (terminal), in Rails you can print the result in the View by using the debug's Helper <a href="http://api.rubyonrails.org/classes/ActionView/Helpers/DebugHelper.html" rel="nofollow">ActionView::Helpers::DebugHelper</a>

<pre><code>#app/view/controllers/post_controller.rb
def index
 @posts = Post.all
end

#app/view/posts/index.html.erb
&lt;%= debug(@posts) %&gt;

#start your server
rails -s
</code></pre>

results (in browser)

<pre><code>- !ruby/object:Post
 raw_attributes:
 id: 2
 title: My Second Post
 body: Welcome! This is another example post
 published_at: '2015-10-19 23:00:43.469520'
 created_at: '2015-10-20 00:00:43.470739'
 updated_at: '2015-10-20 00:00:43.470739'
 attributes: !ruby/object:ActiveRecord::AttributeSet
 attributes: !ruby/object:ActiveRecord::LazyAttributeHash
 types: &amp;5
 id: &amp;2 !ruby/object:ActiveRecord::Type::Integer
 precision: 
 scale: 
 limit: 
 range: !ruby/range
 begin: -2147483648
 end: 2147483648
 excl: true
 title: &amp;3 !ruby/object:ActiveRecord::Type::String
 precision: 
 scale: 
 limit: 
 body: &amp;4 !ruby/object:ActiveRecord::Type::Text
 precision: 
 scale: 
 limit: 
 published_at: !ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter
 subtype: &amp;1 !ruby/object:ActiveRecord::Type::DateTime
 precision: 
 scale: 
 limit: 
 created_at: !ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter
 subtype: *1
 updated_at: !ruby/object:ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter
 subtype: *1
</code></pre>

I'm looking for a way to dump the structure of an object, similar to the PHP functions <code>print_r</code> and <code>var_dump</code> for debugging reasons.

Is there a print_r or var_dump equivalent in Ruby / Ruby on Rails?

出于调试的原因，我正在寻找一种转储对象结构的方法，类似于PHP函数print_r和var_dump。

问在Ruby / Ruby on Rails中有没有print_r或var_dump的等价物？
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