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@mttdffy
Last active November 17, 2017 19:59
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RoR/Mongoid module for removing validations from a model
module Mongoid
module Unvalidate
extend ActiveSupport::Concern
module ClassMethods
# Removes specified validations from existing models for a given field
#
# @param [Symbol] field the field to remove validations from
# @param [Array<Symbol> | Symbol] validations validations to remove from field
#
# @return nil
#
def unvalidates(field, validations)
validations = Array(validations).map do |validation|
[validation, 'validator'].join('_').classify
end
_validators.reject! do |key, validators|
if field == key
validators.any? do |validator|
validations.include?(extract_validator_name(validator))
end
end
end
_validate_callbacks.each do |callback|
if is_callback_class?(callback) &&
callback.raw_filter.attributes.include?(field) &&
validations.include?(extract_validator_name(callback.raw_filter))
_validate_callbacks.delete(callback)
end
end
end
# Removes all validations from a given field
#
# @param [Symbol] field field to remove validations from
#
# @return nil
#
def unvalidates_all(field)
_validators.reject! do |key, _|
key == field
end
_validate_callbacks.each do |callback|
if is_callback_class?(callback) &&
callback.raw_filter.attributes.include?(field)
_validate_callbacks.delete(callback)
end
end
end
# Removes method-based validation
#
# @param [Symbol] method name of validation method to remove
#
# @return nil
#
def unvalidate(method)
_validate_callbacks.each do |callback|
if callback.raw_filter == method
_validate_callbacks.delete(callback)
end
end
end
private
def extract_validator_name(validator)
validator.class.to_s.demodulize
end
def is_callback_class?(callback)
callback.raw_filter.respond_to?(:attributes)
end
end
end
end
Review.class_eval do
include Mongoid::Unvalidate
unvalidates :name, :presence
unvalidates :email, [:presence, :uniqueness]
unvalidates_all :city
unvalidate :submitted_by_purchaser
end
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