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module ActiveRecord
module AttributeMethods
module Write
extend ActiveSupport::Concern
included do
attribute_method_suffix "="
end
module ClassMethods
protected
# See define_method_attribute in read.rb for an explanation of
# this code.
def define_method_attribute=(name)
safe_name = name.unpack('h*').first
generated_attribute_methods.module_eval <<-STR, __FILE__, __LINE__ + 1
def __temp__#{safe_name}=(value)
write_attribute(AttrNames::ATTR_#{safe_name}, value)
end
alias_method #{(name + '=').inspect}, :__temp__#{safe_name}=
undef_method :__temp__#{safe_name}=
STR
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)
attr_name = attr_name.to_s
attr_name = self.class.primary_key if attr_name == 'id' && self.class.primary_key
@attributes_cache.delete(attr_name)
column = column_for_attribute(attr_name)
# If we're dealing with a binary column, write the data to the cache
# so we don't attempt to typecast multiple times.
if column && column.binary?
@attributes_cache[attr_name] = value
end
if column || @attributes.has_key?(attr_name)
@attributes[attr_name] = type_cast_attribute_for_write(column, value)
else
raise ActiveModel::MissingAttributeError, "can't write unknown attribute `#{attr_name}'"
end
end
alias_method :raw_write_attribute, :write_attribute
private
# Handle *= for method_missing.
def attribute=(attribute_name, value)
write_attribute(attribute_name, value)
end
def type_cast_attribute_for_write(column, value)
return value unless column
column.type_cast_for_write value
end
end
end
end
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