in a

aws.ecs.TaskDefinition()

resource I’d like to use other resource attributes in the

container_definitions

parameter which requires a valid JSON document (currently declaring within

json.dumps

). However, when I try this I get the error

TypeError: Object of type Output is not JSON serializable

. Is there a way to do this?

Hey Josh - the whole Input/ Output thing takes some getting used to & still trips me up. Worth reading the whole section of the architecture docs to get familiar with it. Either way, you need to apply the output to the json using a closure, either via <https://www.pulumi.com/docs/intro/concepts/inputs-outputs/#apply%7C&lt;your-resource-attribute&gt;.apply()> or use Output.all() (python/ c#) or pulumi.all() (js/ ts, go)