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Contents
# frozen_string_literal: true
class Serega
module SeregaValidations
#
# Attribute parameters validators
#
module Attribute
#
# Attribute `block` parameter validator
#
class CheckBlock
class << self
#
# Checks block parameter provided with attribute.
# Must have up to two arguments - object and context.
# It should not have any *rest or **key arguments
#
# @example without arguments
# attribute(:email) { CONSTANT_EMAIL }
#
# @example with one argument
# attribute(:email) { |obj| obj.confirmed_email }
#
# @example with two arguments
# attribute(:email) { |obj, context| context['is_current'] ? obj.email : nil }
#
# @param block [Proc] Block that returns serialized attribute value
#
# @raise [SeregaError] SeregaError that block has invalid arguments
#
# @return [void]
#
def call(block)
return unless block
check_block(block)
end
private
def check_block(block)
params = block.parameters
return if (params.count <= 2) && params.all? { |par| par[0] == :opt }
raise SeregaError, block_error
end
def block_error
"Block can have maximum two regular parameters (no **keyword or *array args)"
end
end
end
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems