def initialize(attributes = nil, options = {})
@attributes = attributes_from_column_definition
@association_cache = {}
@aggregation_cache = {}
@attributes_cache = {}
@new_record = true
@readonly = false
@destroyed = false
@marked_for_destruction = false
@previously_changed = {}
@changed_attributes = {}
@relation = nil
ensure_proper_type
set_serialized_attributes
populate_with_current_scope_attributes
assign_attributes(attributes, options) if attributes
yield self if block_given?
run_callbacks :initialize
end