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2021-08-31

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#clara
<
2021-08-31
>
ishodge05:08:07

i was trying to evaluate the following query from the query documentation: 

(defquery get-promotions
  "Query to find promotions for the purchase."
  [?type] ;;; can also be specified using a keyword as :?type, but symbols are more idiomatic to specify bindings.
  [?promotion <- Promotion (= ?type type)])
and got a syntax error: unable to resolve symbol ?type in this context. when i change the ?type symbol to a keyword, the error goes away. very new to clojure/clara here. am i missing something? thanks!

mikerod16:08:50

@johsi.k can you share the full stack trace?

ishodge05:09:31

here’s the full stack trace 

2. Unhandled clojure.lang.Compiler$CompilerException
   Error compiling src/bug.clj at (19:1)
   #:clojure.error{:phase :compile-syntax-check,
                   :line 19,
                   :column 1,
                   :source "/Users/johsi/Documents/clj-rules/src/bug.clj"}
             Compiler.java: 6812  clojure.lang.Compiler/analyze
             Compiler.java: 6749  clojure.lang.Compiler/analyze
             Compiler.java: 3191  clojure.lang.Compiler$SetExpr/parse
             Compiler.java: 6803  clojure.lang.Compiler/analyze
             Compiler.java: 6749  clojure.lang.Compiler/analyze
             Compiler.java: 3108  clojure.lang.Compiler$MapExpr/parse
             Compiler.java: 6801  clojure.lang.Compiler/analyze
             Compiler.java:   38  clojure.lang.Compiler/access$300
             Compiler.java:  596  clojure.lang.Compiler$DefExpr$Parser/parse
             Compiler.java: 7111  clojure.lang.Compiler/analyzeSeq
             Compiler.java: 6793  clojure.lang.Compiler/analyze
             Compiler.java: 6749  clojure.lang.Compiler/analyze
             Compiler.java: 7185  clojure.lang.Compiler/eval
             Compiler.java: 7136  clojure.lang.Compiler/eval
                  core.clj: 3202  clojure.core/eval
                  core.clj: 3198  clojure.core/eval
    interruptible_eval.clj:   87  nrepl.middleware.interruptible-eval/evaluate/fn/fn
                  AFn.java:  152  clojure.lang.AFn/applyToHelper
                  AFn.java:  144  clojure.lang.AFn/applyTo
                  core.clj:  667  clojure.core/apply
                  core.clj: 1977  clojure.core/with-bindings*
                  core.clj: 1977  clojure.core/with-bindings*
               RestFn.java:  425  clojure.lang.RestFn/invoke
    interruptible_eval.clj:   87  nrepl.middleware.interruptible-eval/evaluate/fn
                  main.clj:  437  clojure.main/repl/read-eval-print/fn
                  main.clj:  437  clojure.main/repl/read-eval-print
                  main.clj:  458  clojure.main/repl/fn
                  main.clj:  458  clojure.main/repl
                  main.clj:  368  clojure.main/repl
               RestFn.java:  137  clojure.lang.RestFn/applyTo
                  core.clj:  667  clojure.core/apply
                  core.clj:  662  clojure.core/apply
                regrow.clj:   18  refactor-nrepl.ns.slam.hound.regrow/wrap-clojure-repl/fn
               RestFn.java: 1523  clojure.lang.RestFn/invoke
    interruptible_eval.clj:   84  nrepl.middleware.interruptible-eval/evaluate
    interruptible_eval.clj:   56  nrepl.middleware.interruptible-eval/evaluate
    interruptible_eval.clj:  152  nrepl.middleware.interruptible-eval/interruptible-eval/fn/fn
                  AFn.java:   22  clojure.lang.AFn/run
               session.clj:  202  nrepl.middleware.session/session-exec/main-loop/fn
               session.clj:  201  nrepl.middleware.session/session-exec/main-loop
                  AFn.java:   22  clojure.lang.AFn/run
               Thread.java:  829  java.lang.Thread/run

1. Caused by java.lang.RuntimeException
   Unable to resolve symbol: ?type in this context

                 Util.java:  221  clojure.lang.Util/runtimeException
             Compiler.java: 7418  clojure.lang.Compiler/resolveIn
             Compiler.java: 7362  clojure.lang.Compiler/resolve
             Compiler.java: 7323  clojure.lang.Compiler/analyzeSymbol
             Compiler.java: 6772  clojure.lang.Compiler/analyze
             Compiler.java: 6749  clojure.lang.Compiler/analyze
             Compiler.java: 3191  clojure.lang.Compiler$SetExpr/parse
             Compiler.java: 6803  clojure.lang.Compiler/analyze
             Compiler.java: 6749  clojure.lang.Compiler/analyze
             Compiler.java: 3108  clojure.lang.Compiler$MapExpr/parse
             Compiler.java: 6801  clojure.lang.Compiler/analyze
             Compiler.java:   38  clojure.lang.Compiler/access$300
             Compiler.java:  596  clojure.lang.Compiler$DefExpr$Parser/parse
             Compiler.java: 7111  clojure.lang.Compiler/analyzeSeq
             Compiler.java: 6793  clojure.lang.Compiler/analyze
             Compiler.java: 6749  clojure.lang.Compiler/analyze
             Compiler.java: 7185  clojure.lang.Compiler/eval
             Compiler.java: 7136  clojure.lang.Compiler/eval
                  core.clj: 3202  clojure.core/eval
                  core.clj: 3198  clojure.core/eval
    interruptible_eval.clj:   87  nrepl.middleware.interruptible-eval/evaluate/fn/fn
                  AFn.java:  152  clojure.lang.AFn/applyToHelper
                  AFn.java:  144  clojure.lang.AFn/applyTo
                  core.clj:  667  clojure.core/apply
                  core.clj: 1977  clojure.core/with-bindings*
                  core.clj: 1977  clojure.core/with-bindings*
               RestFn.java:  425  clojure.lang.RestFn/invoke
    interruptible_eval.clj:   87  nrepl.middleware.interruptible-eval/evaluate/fn
                  main.clj:  437  clojure.main/repl/read-eval-print/fn
                  main.clj:  437  clojure.main/repl/read-eval-print
                  main.clj:  458  clojure.main/repl/fn
                  main.clj:  458  clojure.main/repl
                  main.clj:  368  clojure.main/repl
               RestFn.java:  137  clojure.lang.RestFn/applyTo
                  core.clj:  667  clojure.core/apply
                  core.clj:  662  clojure.core/apply
                regrow.clj:   18  refactor-nrepl.ns.slam.hound.regrow/wrap-clojure-repl/fn
               RestFn.java: 1523  clojure.lang.RestFn/invoke
    interruptible_eval.clj:   84  nrepl.middleware.interruptible-eval/evaluate
    interruptible_eval.clj:   56  nrepl.middleware.interruptible-eval/evaluate
    interruptible_eval.clj:  152  nrepl.middleware.interruptible-eval/interruptible-eval/fn/fn
                  AFn.java:   22  clojure.lang.AFn/run
               session.clj:  202  nrepl.middleware.session/session-exec/main-loop/fn
               session.clj:  201  nrepl.middleware.session/session-exec/main-loop
                  AFn.java:   22  clojure.lang.AFn/run
               Thread.java:  829  java.lang.Thread/run
i think the issue is that a syntax change was made and the documentation updated, but those never made it to a new release: https://github.com/cerner/clara-rules/pull/463

👍 2
ethanc04:09:10

I will try and work with @U0KRSVDHR and see if we can get that released

wparker21:09:35

I can plan on doing a release sometime this weekend @U3KC48GHW.

ishodge05:09:09

thank you!

mikerod03:09:31

Good find!