# File activerecord/lib/active_record/validations.rb, line 46
def save(options = {})
  perform_validations(options) ? super : false
end

The validation process on save can be skipped by passing validate: false. The validation context can be changed by passing context: context. The regular ActiveRecord::Base#save method is replaced with this when the validations module is mixed in, which it is by default.

# File activerecord/lib/active_record/validations.rb, line 52
def save!(options = {})
  perform_validations(options) ? super : raise_validation_error
end

Attempts to save the record just like ActiveRecord::Base#save but will raise an ActiveRecord::RecordInvalid exception instead of returning false if the record is not valid.

# File activerecord/lib/active_record/validations.rb, line 66
def valid?(context = nil)
  context ||= default_validation_context
  output = super(context)
  errors.empty? && output
end

Runs all the validations within the specified context. Returns true if no errors are found, false otherwise.

Aliased as validate.

If the argument is false (default is nil), the context is set to :create if new_record? is true, and to :update if it is not.

Validations with no :on option will run no matter the context. Validations with some :on option will only run in the specified context.