Rule engine not able to extract key from dataCtx

[Bugging-Bot]

Hi,
I am trying to use Grule as middleware for GIN API’s. Issue which I am facing is data context key is not identified in rule file(*.grl).
I am getting an ### error: Got error left hand expression error. got non existent key Request" lib=grule-rule-engine package=engine.

Rule in the rule.grl file is

rule R001 "Check book request" salience 10 {
when
Request.Version == "v1"
then
Request.Category = "Executed";
}

Code:

type RequestCtx struct {
Version string
Category string // To get value
}

func GruleMiddleware() gin.HandlerFunc {
return func(c *gin.Context) {

    requestFact := grule.PrepareFacts(c) // this function extract content from gix context and return map[string]interface{}
    requestCtx := &RequestCtx{
        Version:     requestFact["version"].(string),
        Category:    requestFact["category"].(string),
    }
    dataCtx := ast.NewDataContext()
    err := dataCtx.Add("Request", requestCtx)
    if err != nil {
        zaplog.Logger.Error("Error in adding request to data context", zap.Any("Error Code:", err.Error()))
    }
 
    knowledgeLibrary := ast.NewKnowledgeLibrary()
    ruleBuilder := builder.NewRuleBuilder(knowledgeLibrary) // creating new instance of rule builder,
    fileRes := pkg.NewFileResource("C:/Users/../rules/sample/rule.grl") // rule content is shared above
    err0 := ruleBuilder.BuildRuleFromResource("TutorialRules", "0.0.1", fileRes)
    if err0 != nil {
        zaplog.Logger.Error("error", zap.Any("Error Code:", err0.Error()))
    }

    knowledgeBase := knowledgeLibrary.NewKnowledgeBaseInstance("TutorialRules", "0.0.1")
   engine := engine.NewGruleEngine()
    err1 := engine.Execute(dataCtx, knowledgeBase)
    if err1 != nil {
        zaplog.Logger.Error("Error in executing Rule Engine", zap.Any("Error Code:", err1.Error()))
    }
    c.Next() // to move on next step/ middleware
}

}

Please help me in troubleshooting this issue.

[Bugging-Bot]

Please help me in resolving error :

time="2023-07-22T22:32:28+05:30" level=error msg="Error while evaluating rule R001, got left hand expression error. got left hand expression error. got non existent key Request" lib=grule-rule-engine package=ast
time="2023-07-22T22:32:28+05:30" level=error msg="Failed testing condition for rule : R001. Got error left hand expression error. got left hand expression error. got non existent key Request" lib=grule-rule-engine package=engine

But rule is executing