如何在 Rails 中打印出对象的内容以便于调试? [英] How do I print out the contents of an object in Rails for easy debugging?

问题描述

我想我正在尝试获得与 print_r() 等效的 PHP(打印人类可读)；目前原始输出是:

I think I'm trying to get the PHP equivalent of print_r() (print human-readable); at present the raw output is:

ActiveRecord::Relation:0x10355d1c0

我该怎么办?

推荐答案

我一般先尝试 .inspect，如果那不能给我想要的，我会切换到 .to_yaml.

I generally first try .inspect, if that doesn't give me what I want, I'll switch to .to_yaml.

class User
  attr_accessor :name, :age
end

user = User.new
user.name = "John Smith"
user.age = 30

puts user.inspect
#=> #<User:0x423270c @name="John Smith", @age=30>
puts user.to_yaml
#=> --- !ruby/object:User
#=> age: 30
#=> name: John Smith

希望有所帮助.

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