我正在尝试保存游戏的当前状态。我通过创建一个新文件并编写YAML::dump(game_state)，将game_state对象序列化为YAML。然后，我使用以下代码对其进行反序列化：
input = YAML.open(@text_input.to_s + '.yml', 'r')
playstate = YAML.load(input.read)
puts playstate
我在运行时收到这个错误
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)
那么，我的YAML格式不好吗？这是我第一次使用它，所以堆栈跟踪对我来说意义不大。任何帮助都将不胜感激。
这就是game_state的YAML文件的样子。
--- &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
我只是走了一条类似的路。在您的YAML文件中查找以下格式的行：
action: !ruby/object:Proc {}
YAML不能处理lambdas或proc（没有合理的方法来序列化它们）。如果您可以访问生成YAML'd对象的代码，也许您可以用实际的对象和方法调用来替换lambdas？
例如，如果生成此YAML转储的代码：
icon = PlanetDefense::RingMenu::Icon.new
icon.action = lambda {|arg1| do_something_with(arg1)}
您可能可以编写一个类，它的唯一工作就是替换lambda:
class IconAction
def call(arg1)
do_something_with(arg1)
end
end
...
icon = PlanetDefense::RingMenu::Icon.new
icon.action = IconAction.new