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# frozen_string_literal: true
# requires `ActiveModel::AttributeAssignment` and `Hash#stringify_keys`
module ActiveModel
module AttributeAssignment
# Allows you to set nil attributes by passing in a hash of attributes with
# keys matching the attribute names.
#
# @raise [ActiveModel::ForbiddenAttributesError] If the passed hash responds to `permitted?` method
# and the return value of this method is +false+.
#
# @example
#
# class Cat
# include ActiveModel::AttributeAssignment
# attr_accessor :name, :status
# end
#
# cat = Cat.new
# cat.assign_nil_attributes(name: "Gorby")
# cat.name # => 'Gorby'
# cat.status # => nil
# cat.assign_nil_attributes(status: "yawning")
# cat.name # => 'Gorby'
# cat.status # => 'yawning'
# cat.assign_nil_attributes(status: "sleeping")
# cat.name # => 'Gorby'
# cat.status # => 'yawning'
#
# @param new_attributes
#
# @return [void]
#
def assign_nil_attributes(new_attributes)
unless new_attributes.respond_to?(:stringify_keys)
raise(ArgumentError, 'When assigning attributes, you must pass a hash as an argument.')
end
return if new_attributes.empty?
attributes = new_attributes.stringify_keys
_assign_nil_attributes(sanitize_for_mass_assignment(attributes))
end
private
# Assign any `nil` attribute
#
# @param attributes [Hash]
#
# @return [void]
#
def _assign_nil_attributes(attributes)
attributes.each do |k, v|
next unless v.nil?
_assign_attribute(k, v)
end
end
end
end
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20 entries across 20 versions & 1 rubygems