Hi!
I’m making a graph tool, and i have some problem with the
serialization of my graphs. The problem comes when i try to load a
graph i earlier serialized with YAML. In the objects i serialize, I
have two instance variables (arrays, as below) that contain some other
objects of similar type (also serialized). I managed to reproduce the
problem with a simpler object structure below. To me, this seems very
wierd, especially since it saves some data and breaks it when
loading. Could it be a bug, or am I doing something wrong here?
ruby --version is “1.8.4 (2005-12-24) [i486-linux]”. My operating
system is Debian GNU/Linux 4.0.
Ruby code:
require “yaml”
Test class with two instance variables to hold arrays with similar
objects
class Test
attr_accessor :c1, :c2
def initialize(c1=[], c2=[]) @c1, @c2 = c1, c2 end
end
a = Test.new
b = Test.new([a],[Test.new])
a.c1 << b
a.c2 << b
The problem comes when saving the whole thing as an array
ary = [a, b]
yaml1 = YAML.dump(ary)
+ary_from_yaml[0]+ looses its c2 even though it’s clearly in the YAML
output
ary_from_yaml = YAML.load(yaml1)
yaml2 = YAML.dump(ary_from_yaml)
print “YAML 1\n” + yaml1 + “\n\n”
print “YAML 2\n” + yaml2 + “\n\n”
print “YAML 1 length: #{yaml1.length} \tYAML 2 length: #{yaml2.length}”