Yhyjyk

Trying to return all fields in object

System.QueryException: unexpected token: '('

when I run the Invocable class at the parents = assignment

public with sharing class AuditReportBulkifyClass 

 @InvocableMethod(label='Collect Bulkified Records')
 public static List<List<hdone__AuditReport__c>> gatherRequests(Request[] requests) 

 // Gather bulkified records from Flow
 Map<Id, hdone__AuditReport__c> parents = new Map<Id, hdone__AuditReport__c>();

 // Want to get all fields from object for use in Flows
 Map<String, Schema.SobjectField> fieldMap = hdone__AuditReport__c.SobjectType.getDescribe().fields.getMap();
 Set<String> fieldNames = fieldMap.keySet();
 String myset_Joined = string.join(new List<String>(fieldNames), ',');
 String theQuery = 'SELECT ' + myset_Joined + ' FROM hdone__AuditReport__c WHERE Id IN :parents.keySet()';

 for(Request request : requests) 
 parents.put(request.recordId, null);
 

 parents = new Map<Id, hdone__AuditReport__c>(
 (List<hdone__AuditReport__c>)Database.query(theQuery)
 );

 // Flows must return List<List> for Sobject Collections. This is returned as Sobject Collection to Flow
 List<List<hdone__AuditReport__c>> responseColl = new List<List<hdone__AuditReport__c>>();

 // Add all of the values to an initial List
 List<hdone__AuditReport__c> responseList = new List<hdone__AuditReport__c>();
 responseList.addAll(parents.values());

 System.debug('Size of ResponseList ' + responseList.size());

 // Adds actual values we will use to the List of List
 responseColl.add(responseList);
 System.debug('Return responseColl size ' + responseColl.size());

 // Initialize a new list which will return empty to ensure return same number of interviews back to Flow
 List<hdone__AuditReport__c> emptyList = new List<hdone__AuditReport__c>();

 // Iterate through number of interviews - 1 and assign to empty list
 for (Integer i=0; i<responseList.size()-1; i++)
 responseColl.add(emptyList);
 
 return responseColl;
 

 public with sharing class Request 
 @InvocableVariable(label='Record ID' required=true)
 public Id recordId;

 @InvocableVariable(label='Object API Name' required=false)
 public String objectName;

 @InvocableVariable(label='Parent ID' required=false)
 public Id parentId;
 

There are some variable bindings that "normal" SOQL can resolve, but Dynamic SOQL cannot.

It's probably not a perfect rule, but if your variable binding includes a period/dot/full-stop like you have in parents.keySet(), then chances are that it won't work with Dynamic SOQL.

See the "Dynamic SOQL Considerations" section of the documentation on dynamic SOQL for a better idea of what, precisely, is and is not allowed.

The solution here is to store your parents.keySet() in a dedicated variable of type Set<Id> sometime prior to when you need it in your dynamic query. You could probably use String.format() somehow as well.