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require 'active_support/core_ext/module/method_transplanting'
module ActiveRecord
module AttributeMethods
module Write
WriterMethodCache = Class.new(AttributeMethodCache) {
private
def method_body(method_name, const_name)
<<-EOMETHOD
def #{method_name}(value)
name = ::ActiveRecord::AttributeMethods::AttrNames::ATTR_#{const_name}
write_attribute(name, value)
end
EOMETHOD
end
}.new
extend ActiveSupport::Concern
included do
attribute_method_suffix "="
end
module ClassMethods
protected
if Module.methods_transplantable?
def define_method_attribute=(name)
method = WriterMethodCache[name]
generated_attribute_methods.module_eval {
define_method "#{name}=", method
}
end
else
def define_method_attribute=(name)
safe_name = name.unpack('h*').first
ActiveRecord::AttributeMethods::AttrNames.set_name_cache safe_name, name
generated_attribute_methods.module_eval <<-STR, __FILE__, __LINE__ + 1
def __temp__#{safe_name}=(value)
name = ::ActiveRecord::AttributeMethods::AttrNames::ATTR_#{safe_name}
write_attribute(name, value)
end
alias_method #{(name + '=').inspect}, :__temp__#{safe_name}=
undef_method :__temp__#{safe_name}=
STR
end
end
end
# Updates the attribute identified by <tt>attr_name</tt> with the
# specified +value+. Empty strings for fixnum and float columns are
# turned into +nil+.
def write_attribute(attr_name, value)
write_attribute_with_type_cast(attr_name, value, true)
end
def raw_write_attribute(attr_name, value)
write_attribute_with_type_cast(attr_name, value, false)
end
private
# Handle *= for method_missing.
def attribute=(attribute_name, value)
write_attribute(attribute_name, value)
end
def write_attribute_with_type_cast(attr_name, value, should_type_cast)
attr_name = attr_name.to_s
attr_name = self.class.primary_key if attr_name == 'id' && self.class.primary_key
type = type_for_attribute(attr_name)
unless has_attribute?(attr_name) || self.class.columns_hash.key?(attr_name)
raise ActiveModel::MissingAttributeError, "can't write unknown attribute `#{attr_name}'"
end
if should_type_cast
@attributes[attr_name] = Attribute.from_user(value, type)
else
@attributes[attr_name] = Attribute.from_database(value, type)
end
value
end
end
end
end
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