I have an invocable Apex class that returns me a list of ids. But when I create an apex action at the level of my flow builder, I cannot store the list in a collection variable, it just offers me a simple variable.
and my need is to retrieve this list of id and apply a loop on this list in my flow.
[SalesForce] How – Call invocable Apex class that returns me a list of ids, in flow builder
Related Solutions
The InvocableMethod interface is bulkified. This allows you to map flows within Process Builder in a bulkified manner. As the documentation states, your parameter must be...
A list of a primitive data type or a list of lists of a primitive data type – the generic Object type is not supported.
This means that to pass in a collection, you actually need to use List<List<String>> (or whichever other type you need), and to pass in a normal variable, you need to use List<String>.
I have copied and pasted your apex code in my org. Created firstNameOptions text variable in flow and it shows up under Apex Action.Please see below screenshot.
Deselect Allow Multiple values(Collection)
Best Answer
The InvocableMethod annotation is designed to handle Flows in bulk (e.g. Process Builder automations). To return a simple variable, you need to return a list, to assign to a collection, you must return a list of lists (e.g.
List<List<Id>>). The size of the returned list must match the size of the input parameter list.