I'm trying to build a bulkified version of Flow's Fast Lookup element so that I can safely trigger bulkified flows from process builder.

I've written an InvocableMethod which allows me to pass in a list of Ids and return a list of SObjects with the appropriate fields queried. These work perfectly with the test class I've written with them, but when invoked from a flow they fail:

public class UserFastLookup {

    @InvocableMethod(label='Retrieve User' description='Returns the User requested, acts as a bulkified version of Fast Lookup')
    public static list<User> getUsers(list<Id> requestIds) {

        //query for user Ids requested
        map<Id,User> recordMap = new map<Id,User>([SELECT Id, Name FROM User WHERE Id IN :requestIds]);

        list<User> userResults = new list<User>();

        //return Users in same order as request to Flow
        for (Id request : requestIds) {

        return userResults;

I've created a very simple flow, which invokes the Apex InvocableMethod with an Id passed into it, captures the User object output into an SObject variable, and dumps it to the screen (as a simplification to the headless flow using a record update, which exhibits the same errors).

<?xml version="1.0" encoding="UTF-8"?>
<Flow xmlns="http://soap.sforce.com/2006/04/metadata">
        <label>Lookup User</label>
    <interviewLabel>User Lookup Test {!$Flow.CurrentDateTime}</interviewLabel>
    <label>User Lookup Test</label>

This fails with the following error:

FLOW_ELEMENT_ERROR The flow failed to access the value for usr.Name because it hasn't been set or assigned.|FlowScreen|Display

If I rewrite the code to return a list of strings it works perfectly (and plugs into process builder and works perfectly for bulk operations, as described here).

public static list<String> getUsers(list<Id> requestIds) {}

I've also attempted to define the SObject within an InvocableVariable for the return type, again no luck

public static list<Result> getUsers(list<Id> requestIds) {}

public class Result {
    @InvocableVariable(label='User' description='Retrieved User Object')
    public User usr;

Can anyone see where I'm going wrong with this, or has anyone successfully passed SObject from an Apex Invocable Method to a Flow?

  • I got the same problem, and the debug log is not helping... Commented Mar 17, 2015 at 10:51
  • Thanks for looking into this. As you say, debug log doesn't add much. I can debug the returned userResults which contains what I'd expect when running the flow. Also invoking the InvocableMethod from the REST API, as described here codeandvogue.com/2015/02/02/el-poder-de-invocable-spring-15, is successful.
    – James
    Commented Mar 19, 2015 at 22:11

1 Answer 1


This was resolved by Salesforce around 3rd May 2015 https://twitter.com/andyinthecloud/status/594895616381165569

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