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Contents
module ActiveType
module Util
def cast(object, klass)
if object.is_a?(ActiveRecord::Relation)
cast_relation(object, klass)
elsif object.is_a?(ActiveRecord::Base)
cast_record(object, klass)
else
raise ArgumentError, "Don't know how to cast #{object.inspect}"
end
end
def scoped(klass_or_relation)
klass_or_relation.where(nil)
end
private
def cast_record(record, klass)
# record.becomes(klass).dup
klass.new do |casted|
# Rails 3.2, 4.2
casted.instance_variable_set(:@attributes, record.instance_variable_get(:@attributes))
# Rails 3.2
casted.instance_variable_set(:@attributes_cache, record.instance_variable_get(:@attributes_cache))
# Rails 4.2
casted.instance_variable_set(:@changed_attributes, record.instance_variable_get(:@changed_attributes))
# Rails 5.0
casted.instance_variable_set(:@mutation_tracker, record.instance_variable_get(:@mutation_tracker))
# Rails 3.2, 4.2
casted.instance_variable_set(:@new_record, record.new_record?)
# Rails 3.2, 4.2
casted.instance_variable_set(:@destroyed, record.destroyed?)
# Rails 3.2, 4.2
errors = record.errors
if errors.kind_of? ActiveModel::Errors
errors = errors.dup
# otherwise attributes defined in ActiveType::Record
# won't be visible to `errors.add`
errors.instance_variable_set(:@base, casted)
end
casted.instance_variable_set(:@errors, errors)
end
end
def cast_relation(relation, klass)
scoped(klass).merge(scoped(relation))
end
extend self
end
end
Version data entries
6 entries across 6 versions & 1 rubygems