Apex defined field not accessible in the flow

Question

I'm returning this output from my flow action -

global class FlowOutput {
    @InvocableVariable(label='Content')
    @AuraEnabled
    global List<Types.Resource> content;
  }

Type.Resource class is defined as following -

global class Resource {
    @InvocableVariable
    @AuraEnabled
    global String id;

    @InvocableVariable
    @AuraEnabled
    global String type; // file|folder

    @InvocableVariable
    @AuraEnabled
    global String name;

    global Resource(String id, String type, String name) {
      this.id = id;
      this.type = type;
      this.name = name;
    }

    global Resource() {
    }
  }

When I try to use the content variable in collection filter, I get this error

How do I resolve this?

Answer 1

For the field to be visible in flow, it's class needs to be an outer class. Resource was a inner class earlier under Type. Moving it out as a outer class solved the problem