How to work with the result of a query from RoR to the database?

Question

Ruby on Rails

There is a model in RoR. I make a request to the database, a boolean value should be returned from the request.

logger.debug "subscribe_on subs-: #{subs}"

- shows

subscribe_on subs-: #Subscription:0x7f9954e08158

logger.debug "subscribe_on subs-: #{subs.inspect}"

shows

subscribe_on subs-: #Subscription subscribe: false

What type of data does the query return and how to get the boolean type from it?
Update:
Model :

validates :email, :presence=> true, 
  					:format=> VALID_EMAIL_REGEX,
  					:uniqueness=> {:if=> :subscribe_on?}
def subscribe_on?
  subs = Subscription.find(:email self.email).subscribe
  logger.debug "subscribe_on subs-: #{subs}"
end

UPD2:
In general, almost such code is needed

class Subscription < ActiveRecord::Base
  before_save { self.email = email.downcase}
  VALID_EMAIL_REGEX = /\A[\w+\-.][email protected][a-z\d\-.]+\.[a-z]+\z/i
  validates :email, :presence=> true, :format=> VALID_EMAIL_REGEX, :uniqueness=> {:scope => :subscribe}

Executing a query like this

SELECT 1 FROM `subscriptions` WHERE `subscriptions`.`subscribe` = 0 AND (`subscriptions`.`email` = BINARY '[email protected]') LIMIT 1

And instead of subscribe` = 0
subscribe` = 1
It didn’t work yet ( , how?
ruby ​​1.8.7

Answer 1

class Subscription < ActiveRecord::Base
  before_save { email = email.downcase}
  VALID_EMAIL_REGEX = /\A[\w+\-.][email protected][a-z\d\-.]+\.[a-z]+\z/i
  validates :email, :presence=> true, :format=> VALID_EMAIL_REGEX, :uniqueness=> {:if=> :subscribe_on?}
  
  scope :subscribe_on, lambda(subscribe_email){ where(email: subscribe_email, subscribe: true) }
        
  def subscribe_on?
    subs = self.class.subscribe_on(email)
    logger.debug "subscribe_on subs-: #{subs}"
    subs.first
  end
end

Answer 2

If you have a Subscription model with a boolean subscribe attribute, then you need to request subs.subscribe. This should return true or false.

Answer 3

It was worth putting the request itself into the body of the question, otherwise it is not very clear. From the comments, I understood that you are building a query through a model, so an instance (s) of this model will be returned. Moreover, if you specify the attributes that the query should return through select, then only they will be in the model.
Let's say you have a Foo model with bar and baz attributes.

f = Foo.select(:bar).first
# выведет bar
f.bar
# будет ошибка, т.к. этот атрибут не был загружен
f.baz