无法转换出 state。state 未指向下一个 state

Question

hi I want to create a step function I which scenario is I want to go Like this there are 2 scenarios :

1st_step --> 2nd step --> if (Job Complete) -- > special function --> step 3

or

1st_step --> 2nd step --> step 3

and I wrote code like this for cdk

sfn_step_1.next(sfn_step_2).next(sfn.Choice(self, "Job Complete?").when(sfn.Condition.string_equals("$.is_query", "True"), sfn_special_step ).afterwards()).next(sfn_step_3)

In case of "False" I am getting

** Failed to transition out of the state. The state does not point to a next state.**

As I don't want to add state and let it go to step 3 and end. what should I do to fix this?

Answer 1

You can do it like this:

step1 = tasks.LambdaInvoke()
step2 = tasks.LambdaInvoke()
step3 = tasks.LambdaInvoke()

sfn_special_step = tasks.LambdaInvoke()
# here you define the next step and it will keep the flow on as you define in the main flow
sfn_special_step.next(step3)  

step1.next(step2)
    .next(
        sfn.Choice(self, "Job Complete?")
            .when(sfn.Condition.string_equals("$.is_query", "True"), sfn_special_step)
            .afterwards())
    .next(step3)