Mutable Value issues

[hieubui2409]

I have a fact with struct like below:

type MyFact struct {
	Data  []*OrderInfo
	First *OrderInfo
	Last  *OrderInfo

	MutableVar1 string
        MutableVar2 []string
        MutableVar3 []*EvaluationHistoryItem
}

type EvaluationHistoryItem struct {
	EvaluatedBy  string
	EvaluatedAt  int64
	ExchangeRate float64
}

When I try to change value (assign or append value to slice) MutableVar1/MutableVar2/MutableVar3 by both builtin and custom functions, It didn't work.
But when I change my fact struct to (Put all fields need to be mutable inside another object):

type MyFact struct {
	Data  []*OrderInfo
	First *OrderInfo
	Last  *OrderInfo
	Evaluation *EvaluationInfo
}

type EvaluationInfo struct {
	MutableVar1 string
        MutableVar2 []string
        MutableVar3 []*EvaluationHistoryItem
}

type EvaluationHistoryItem struct {
	EvaluatedBy  string
	EvaluatedAt  int64
	ExchangeRate float64
}

I can update value of MutableVar1/MutableVar2/MutableVar3 normally.
Tell me if I did anything wrong. Thank you.

[raymondsryang]

Meet the same problem

[yjagdale]

can you share rule, How you are trying to manipulate the values? Thanks.

[OvenBaker]

Most likely you added the struct to the DataContext by value instead of by reference. If you do so and try to modify a value you'll likely see an error along the lines of got rule engine execute panic ! recovered : reflect: call of reflect.Value.Elem on struct Value.