Rule MUST change the state?

[Akhil Dixit]

Can I write a rule that does not change the state, but only the data inside?

When I write a rule like this, it is getting disabled on the browser interface.

Imagine a scenario in 'too many bananas' problem. If we want to include a possibility that while carrying bananas home, a person may drop few of them in the middle of the road.

Can I do this?

rule DropBananas for state in roommates {

match state {

Happy{}

Hungry{}

GoingToStore{}

ReturningFromStore(bag){

var dropped : 0..bag.carrying = urandomRange(0, bag.carrying);

state = ReturningFromStore{carrying : bag.carrying - dropped}; 

} 

}

}

[Diego Ongaro]

Hi Akhil,

That should be allowed, and by assigning something different back to the variable 'state', the rule does change the global state.

It's possible that you're running into this issue https://github.com/salesforce/runway-compiler/issues/2 , where if Runway happens to test the rule with a random number that doesn't alter the state (dropped=0), it then considers the rule inactive/disabled. Try replacing the random numbers with constants to see if that's the problem.

Best,

Diego

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