module ActiveRecord::Validations

def custom_validation_context? # :nodoc:

:nodoc:
def custom_validation_context? # :nodoc:
  validation_context && [:create, :update].exclude?(validation_context)
end

def default_validation_context

def default_validation_context
  new_record? ? :create : :update
end

def perform_validations(options = {})

def perform_validations(options = {})
  options[:validate] == false || valid?(options[:context])
end

def raise_validation_error

def raise_validation_error
  raise(RecordInvalid.new(self))
end

def save(**options)

with this when the validations module is mixed in, which it is by default.
The regular {ActiveRecord::Base#save}[rdoc-ref:Persistence#save] method is replaced
The validation context can be changed by passing context: context.
The validation process on save can be skipped by passing validate: false.
def save(**options)
  perform_validations(options) ? super : false
end

def save!(**options)

will raise an ActiveRecord::RecordInvalid exception instead of returning +false+ if the record is not valid.
Attempts to save the record just like {ActiveRecord::Base#save}[rdoc-ref:Base#save] but
def save!(**options)
  perform_validations(options) ? super : raise_validation_error
end

def valid?(context = nil)

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

run within multiple contexts.
If the argument is an array of contexts, post.valid?([:create, :update]), the validations are
{new_record?}[rdoc-ref:Persistence#new_record?] is +true+, and to :update if it is not.
If the argument is +false+ (default is +nil+), the context is set to :create if

Aliased as #validate.

no errors are found, +false+ otherwise.
Runs all the validations within the specified context. Returns +true+ if
def valid?(context = nil)
  context ||= default_validation_context
  output = super(context)
  errors.empty? && output
end