What is covered by save(:validate => false)?

问题

I just implemented a number of custom counter_caches using code like this:

def after_save
    self.update_counter_cache
end
def after_destroy
    self.update_counter_cache
end
def update_counter_cache
    self.company.new_matchings_count = Matching.where(:read => false).count
    self.company.save
end

My question is this - what does the command Model.save(:validate => false) actually prevent beyond things like validates_with or before_validation?

Will my custom counter_caches be affected if I keep my existing saves without validation?

回答1:

If you pass in the :validate=>false, it skips the valid? command. Everything else functions the same.

You can check the code out here: http://api.rubyonrails.org/classes/ActiveRecord/Validations.html

def save(options={})
  perform_validations(options) ? super : false
end

...

if perform_validation
  valid?(options.is_a?(Hash) ? options[:context] : nil)
else
  true
end

回答2:

Testing on Rails 4.2.6 shows that .save(:validate=>false) will actually skip before_validations and after_validation callbacks.

来源：https://stackoverflow.com/questions/5356100/what-is-covered-by-savevalidate-false