Bryan Glazer
Reputation: 852
Deserializing ruby object from YAML failure: allocator undefined for Method (TypeError)
I'm trying to save the current state of a game. I serialize the game_state object to YAML by making a new file and writing YAML::dump(game_state). I then use this code to deserialize it:
input = YAML.open(@text_input.to_s + '.yml', 'r')
playstate = YAML.load(input.read)
puts playstate
I get this error at runtime
C:/Ruby192/lib/ruby/1.9.1/psych/visitors/to_ruby.rb:227:in `allocate': allocator
undefined for Method (TypeError)
from C:/Ruby192/lib/ruby/1.9.1/psych/visitors/to_ruby.rb:227:in `revive'
from C:/Ruby192/lib/ruby/1.9.1/psych/visitors/to_ruby.rb:183:in `visit_Psych_Nodes_Mapping'
from C:/Ruby192/lib/ruby/1.9.1/psych/visitors/visitor.rb:7:in `accept'
.......
(I can post the whole trace if necessary)
So, is my YAML poorly formatted? This is my first experience with it, so the stack trace didn't really mean much to me. Any help is appreciated.
This is what my YAML file looks like for the game_state.
--- &20832876 !ruby/object:PlanetDefense::PlayState
options:
:level: 0
:score: 0
game_objects: !ruby/object:Chingu::GameObjectList
game_objects: []
visible_game_objects: []
unpaused_game_objects: []
input_clients: []
previous_game_state: !ruby/object:PlanetDefense::MenuState
options:
- :start
- :options
- :credits
- :quit
game_objects: !ruby/object:Chingu::GameObjectList
game_objects: []
visible_game_objects: []
unpaused_game_objects: []
input_clients: []
previous_game_state: !!null
current: 0
selected: !ruby/object:Gosu::Color
__swigtype__: _p_Gosu__Color
font: !ruby/object:Gosu::Font
__swigtype__: _p_Gosu__Font
background_image: !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
title_image: !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
input:
:up_arrow:
- !ruby/object:Method {}
:down_arrow:
- !ruby/object:Method {}
! ': ':
- !ruby/object:Method {}
:enter:
- !ruby/object:Method {}
:return:
- !ruby/object:Method {}
music: !ruby/object:Gosu::Song
__swigtype__: _p_Gosu__Song
game_state_manager: &22575264 !ruby/object:Chingu::GameStateManager
inside_state: !!null
game_states:
- *20832876
- &20827872 !ruby/object:PlanetDefense::RingMenu
opaque: false
modal: true
rotation: 1
x_radius: 200
y_radius: 100
font: !ruby/object:Gosu::Font
__swigtype__: _p_Gosu__Font
background_image: !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
title_image: !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
cx: 512
cy: 459
caption: !ruby/object:Chingu::Text
size: 15
options:
:rotation_center: :top_left
:zorder: 4
parent: *20832876
paused: false
visible: true
color: !ruby/object:Gosu::Color
__swigtype__: _p_Gosu__Color
mode: :default
x: 512
y: 459
zorder: 4
angle: 0
factor_y: 2.0
factor_x: 1.8
factor: 1
center_x: 0.5
center_y: 0.5
text: SAVE GAME
font: Helvetica
line_spacing: 1
align: :left
max_width: !!null
padding: 5
gosu_font: &20826948 !ruby/object:Gosu::Font
__swigtype__: _p_Gosu__Font
name: Arial
image: !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
height: 20
items:
- !ruby/object:PlanetDefense::RingMenu::Icon
options:
:scale: 2
:zorder: 10
:image: &20827932 !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
:center: 0.5
parent: *20832876
paused: false
visible: true
image: *20827932
color: !ruby/object:Gosu::Color
__swigtype__: _p_Gosu__Color
mode: :default
x: 512.0
y: 359.0
zorder: 10
angle: 0.0
factor_y: 2
factor_x: 2
factor: 2
center_x: 0.5
center_y: 0.5
title: SAVE GAME
action: !ruby/object:Proc {}
- !ruby/object:PlanetDefense::RingMenu::Icon
options:
:scale: 2
:zorder: 10
:image: &20828040 !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
:center: 0.5
parent: *20832876
paused: false
visible: true
image: *20828040
color: !ruby/object:Gosu::Color
__swigtype__: _p_Gosu__Color
mode: :default
x: 321.78869674096927
y: 428.09830056250524
zorder: 10
angle: 288.0
factor_y: 2
factor_x: 2
factor: 2
center_x: 0.5
center_y: 0.5
title: QUIT TO MENU
action: !ruby/object:Proc {}
- !ruby/object:PlanetDefense::RingMenu::Icon
options:
:scale: 2
:zorder: 10
:image: &20827956 !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
:center: 0.5
parent: *20832876
paused: false
visible: true
image: *20827956
color: !ruby/object:Gosu::Color
__swigtype__: _p_Gosu__Color
mode: :default
x: 394.44294954150536
y: 539.9016994374947
zorder: 10
angle: 216.0
factor_y: 2
factor_x: 2
factor: 2
center_x: 0.5
center_y: 0.5
title: RETURN TO GAME
action: !ruby/object:Proc {}
- !ruby/object:PlanetDefense::RingMenu::Icon
options:
:scale: 2
:zorder: 10
:image: &20828004 !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
:center: 0.5
parent: *20832876
paused: false
visible: true
image: *20828004
color: !ruby/object:Gosu::Color
__swigtype__: _p_Gosu__Color
mode: :default
x: 629.5570504584946
y: 539.9016994374947
zorder: 10
angle: 144.0
factor_y: 2
factor_x: 2
factor: 2
center_x: 0.5
center_y: 0.5
title: OPTIONS
action: !ruby/object:Proc {}
- !ruby/object:PlanetDefense::RingMenu::Icon
options:
:scale: 2
:zorder: 10
:image: &20828100 !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
:center: 0.5
parent: *20832876
paused: false
visible: true
image: *20828100
color: !ruby/object:Gosu::Color
__swigtype__: _p_Gosu__Color
mode: :default
x: 702.2113032590307
y: 428.0983005625053
zorder: 10
angle: 72.0
factor_y: 2
factor_x: 2
factor: 2
center_x: 0.5
center_y: 0.5
title: HIGH SCORES
action: !ruby/object:Proc {}
step: 0
input:
:left_arrow:
- !ruby/object:Method {}
:holding_left_arrow:
- !ruby/object:Method {}
:right_arrow:
- !ruby/object:Method {}
:holding_right_arrow:
- !ruby/object:Method {}
:return:
- !ruby/object:Method {}
:released_escape: []
:released_right_arrow: []
cursor: !ruby/object:Chingu::GameObject
options:
:scale: 2.5
:image: &20828172 !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
:zorder: 5
parent: *20832876
paused: false
visible: true
image: *20828172
color: !ruby/object:Gosu::Color
__swigtype__: _p_Gosu__Color
mode: :default
x: 512
y: 359
zorder: 5
angle: 0
factor_y: 2.5
factor_x: 2.5
factor: 2.5
center_x: 0.5
center_y: 0.5
count: 5
game_state_manager: *22575264
- &21041148 !ruby/object:PlanetDefense::SaveGame
options: {}
game_objects: !ruby/object:Chingu::GameObjectList
game_objects:
- &21040788 !ruby/object:PlanetDefense::TextInput
options:
:x: 412
:y: 384
:width: 200
:height: 48
:font: &21040956 !ruby/object:Gosu::Font
__swigtype__: _p_Gosu__Font
parent: *21041148
paused: false
visible: true
color: !ruby/object:Gosu::Color
__swigtype__: _p_Gosu__Color
mode: :default
x: 412
y: 384
zorder: 100
angle: 0
factor_y: 1
factor_x: 1
factor: 1
center_x: 0.5
center_y: 0.5
width: 200
height: 48
font: *21040956
text: !ruby/object:Chingu::Text
size: 15
options:
:rotation_center: :top_left
:x: 412
:y: 384
parent: *21041148
paused: false
visible: true
color: !ruby/object:Gosu::Color
__swigtype__: _p_Gosu__Color
mode: :default
x: 412
y: 384
zorder: 100
angle: 0
factor_y: 1
factor_x: 1
factor: 1
center_x: 0
center_y: 0
text: asdf
font: Arial
line_spacing: 1
align: :left
max_width: !!null
padding: 5
gosu_font: *20826948
image: !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
rect:
- 392
- 372
- 200
- 48
visible_game_objects:
- *21040788
unpaused_game_objects:
- *21040788
input_clients: []
previous_game_state: *20827872
font: *21040956
text_input: *21040788
background_image: !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
title_image: !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
selected: !ruby/object:Gosu::Color
__swigtype__: _p_Gosu__Color
current: 0
menu_options:
- :save game
- :back
input:
:up_arrow:
- !ruby/object:Method {}
:down_arrow:
- !ruby/object:Method {}
:left_arrow:
- !ruby/object:Method {}
:right_arrow:
- !ruby/object:Method {}
:return:
- !ruby/object:Method {}
:released_return: []
:a: []
:s: []
:d: []
:f: []
:released_a: []
:released_s: []
:released_d: []
:released_f: []
game_state_manager: *22575264
color: !ruby/object:Gosu::Color
__swigtype__: _p_Gosu__Color
rect:
- 0
- 522
- 1024
- 36.0
transitional_game_state: !!null
transitional_game_state_options: {}
player: &20832516 !ruby/object:PlanetDefense::Player
vel_max: 7
acceleration: 1
deceleration: 0.95
vel_y: 0.0
vel_x: 0.0
x: 512.0
y: 718.0
image: !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
font: !ruby/object:Gosu::Font
__swigtype__: _p_Gosu__Font
particles: !ruby/object:Chingu::Animation
loop: true
bounce: false
file: media/gfx/fireball.png
index: 0
delay: 100
step: 1
dt: 0
sub_animations: {}
frame_actions: []
width: 32
height: 32
frames:
- !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
- !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
- !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
- !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
weapon: !ruby/object:PlanetDefense::Weapon
player: *20832516
cooldown_rate: 20
heatup_amount: 7
fire_rate: 85
overheat_penalty: 800
last_shot: 0
last_cooldown: 437667665
last_overheat: 0
heat: 0
overheated: false
gauge_color: !ruby/object:Gosu::Color
__swigtype__: _p_Gosu__Color
level:
:number: 0
:background_image: &20831460 !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
:background_music: &20831412 !ruby/object:Gosu::Song
__swigtype__: _p_Gosu__Song
:time: 15000
background_image: *20831460
music: *20831412
planet_health: 1000
lives: 3
life_image: !ruby/object:Gosu::Image
__swigtype__: _p_Gosu__Image
font: !ruby/object:Gosu::Font
__swigtype__: _p_Gosu__Font
health_font: !ruby/object:Gosu::Font
__swigtype__: _p_Gosu__Font
count: 13
pause: true
running: true
win: false
hit: false
game_start: 437666494
time_allowed: 15000
menu: *20827872
game_state_manager: *22575264
input:
:released_return: []
remaining_time: 13830
Upvotes: 1
Views: 2086
Answers (1)
fearless_fool
Reputation: 35219
I just went down a similar path. Look in your YAML file for lines of the form:
action: !ruby/object:Proc {}
YAML can't deal with lambdas or procs (there's no sensible way to serialize them). If you have access to the code that generated the YAML'd object, perhaps you can replace the lambdas with an actual object and method call?
For instance, if the code that generated this YAML dump:
icon = PlanetDefense::RingMenu::Icon.new
icon.action = lambda {|arg1| do_something_with(arg1)}
You might be able to write a class whose sole job is to replace the lambda:
class IconAction
def call(arg1)
do_something_with(arg1)
end
end
...
icon = PlanetDefense::RingMenu::Icon.new
icon.action = IconAction.new
Upvotes: 2
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