Object
OpenStruct allows you to create data objects and set arbitrary attributes. For example:
require 'ostruct' record = OpenStruct.new record.name = "John Smith" record.age = 70 record.pension = 300 puts record.name # -> "John Smith" puts record.address # -> nil
It is like a hash with a different way to access the data. In fact, it is implemented with a hash, and you can initialize it with one.
hash = { "country" => "Australia", :population => 20_000_000 } data = OpenStruct.new(hash) p data # -> <OpenStruct country="Australia" population=20000000>
Create a new OpenStruct object. The optional hash, if given, will generate attributes and values. For example.
require 'ostruct' hash = { "country" => "Australia", :population => 20_000_000 } data = OpenStruct.new(hash) p data # -> <OpenStruct country="Australia" population=20000000>
By default, the resulting OpenStruct object will have no attributes.
# File ostruct.rb, line 46
def initialize(hash=nil)
@table = {}
if hash
for k,v in hash
@table[k.to_sym] = v
new_ostruct_member(k)
end
end
end
Compare this object and other for equality.
# File ostruct.rb, line 147
def ==(other)
return false unless(other.kind_of?(OpenStruct))
return @table == other.table
end
Remove the named field from the object.
# File ostruct.rb, line 109
def delete_field(name)
@table.delete name.to_sym
end
Duplicate an OpenStruct object members.
# File ostruct.rb, line 57
def initialize_copy(orig)
super
@table = @table.dup
end
Returns a string containing a detailed summary of the keys and values.
# File ostruct.rb, line 118
def inspect
str = "#<#{self.class}"
ids = (Thread.current[InspectKey] ||= [])
if ids.include?(object_id)
return str << ' ...>'
end
ids << object_id
begin
first = true
for k,v in @table
str << "," unless first
first = false
str << " #{k}=#{v.inspect}"
end
return str << '>'
ensure
ids.pop
end
end
# File ostruct.rb, line 65
def marshal_load(x)
@table = x
@table.each_key{|key| new_ostruct_member(key)}
end
# File ostruct.rb, line 80
def new_ostruct_member(name)
name = name.to_sym
unless self.respond_to?(name)
class << self; self; end.class_eval do
define_method(name) { @table[name] }
define_method("#{name}=") { |x| modifiable[name] = x }
end
end
name
end