问题描述
更新的代码:在何处添加?f<-(practice-is-on-off OFF)
Updated code:where to add the check for ?f<-(practice-is-on-off OFF)
(defrule no-practice "Rules for when practice cannot be held"
(or ?f <- (practice (number-of-paddlers ?p&:(< ?p 6)))
?f <- (practice (number-of-coaches ?c&:(< ?c 1))))
=>
(modify ?f (practice-is-on-off OFF)))
;end
我正在CLIPS中定义模板,并且正在使用逻辑运算符OR.但是,当我加载模板时,它会抛出一个错误
I am defining a template in CLIPS and I am using logical operator OR.However, when I load the template, it is throwing an error saying
[TMPLTDEF1] Invalid slot or not defined in corresponding deftemplate practice.
ERROR:
(defrule MAIN::no-practice "Rules for when practice cannot be held"
?f <- (practice (or
这是我所拥有的:预先感谢您的任何见解.谢谢
Here's what I have:Thanks in advance for any insight. Thanks
(deftemplate practice "structure of a practice"
(slot number-of-paddlers (type NUMBER))
(slot number-of-coaches (type NUMBER))
(slot practice-is-on-off (type SYMBOL) (default ON))
(slot practice-id (type NUMBER))
)
(defrule no-practice "Rules for when practice cannot be held"
?f <- (practice
(or
(number-of-paddlers
?v_number-of-paddlers&:(
< ?v_number-of-paddlers 6))
(number-of-coaches
?v_number-of-coaches&:(
< ?v_number-of-coaches 1))
)
)
=>
(modify ?f (practice-is-on-off OFF)
)
)
推荐答案
该错误告诉您您正在尝试匹配practice
deftemplate中名为或"的插槽,并且该插槽不存在.这是"no-practice"规则的两个替代版本,可以完成您尝试做的事情.
The error is telling you that you are attempting to match a slot named "or" in the practice
deftemplate and that slot does not exist. Here are two alternate versions of the "no-practice" rule that will accomplish what you are trying to do.:
版本1:
(defrule no-practice "Rules for when practice cannot be held"
(or ?f <- (practice (practice-is-on-off ON)
(number-of-paddlers ?p&:(< ?p 6)))
?f <- (practice (practice-is-on-off ON)
(number-of-coaches ?c&:(< ?c 6))))
=>
(modify ?f (practice-is-on-off OFF)))
请注意,除非您还检查CE中的practice-is-on-off
是否为"ON",否则上述规则可能会为practice
触发两次.
Note that the rule above may fire twice for a practice
unless you also check that practice-is-on-off
is "ON" in the CE's.
版本2:
(defrule no-practice "Rules for when practice cannot be held"
?f <- (practice (practice-is-on-off ON)
(number-of-paddlers ?p) (number-of-coaches ?c))
(test (or (< ?p 6) (< ?c 6)))
=>
(modify ?f (practice-is-on-off OFF)))
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