[SalesForce] Passing a list of records to an invocable method

The documentation on invocableMethod clearly states that you can pass in a list of a sObject type.

There can be at most one input parameter and its data type must be one of the following:
A list of a primitive data type or a list of lists of a primitive data type – the generic Object type is not supported.
A list of an sObject type or a list of lists of an sObject type – the generic sObject type is not supported.

However, in my flow, i only have the option to pass in a sObject variable – there is no option to pass in a sObject collection (I have a sObject collection set to public input / output in the flow).

So how can you pass a list of a sObject type from flow to invocable method? Seems like you can only pass a single sObject.

Best Answer

Found answer on developer boards from Chad Barbour.

If the expectation is to receive a collection you can use in the flow, you'll need to have your method return a collection of collections. In this case, if you're wanting a list of strings (List), you'll want to have it return a list containing lists of strings (List>).

Apparently a sObject variable is a list, and a sObject collection is a list of lists. So you need to be able to work with lists of lists and then you will have the option to pass / receive sObject collections. Go figure...

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Passing multiple collection variables from flow into an apex method using Invocable Variables

To pass in a collection, use List<Type> (for the appropriate Type), and use List<Wrapper> for the input parameter (which translates to just a Wrapper for each Flow Input).

So, the correct code should be:

public class flowInputs {
    @InvocableVariable
    public List<String> psrTestList;

    @InvocableVariable
    public List<String> poaTestList;
}

@InvocableMethod
public static void psr(List<flowInputs> request) {

You're likely getting confused because you'd see this in an example:

@InvocableMethod public static void psr(List<List<String>> request) {

In order to allow a Collection of type String to be brought in. This is because the parameter itself is bulkified, which means the top-level List actually represents a bulk input of data.

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