I am creating a new EmailMessage record from my apex code and I want that this record should be associated to a Lead record. As per documentation, we can not use RelatedToId
RelatedToId : The RelatedToId represents nonhuman objects such as accounts, opportunities, campaigns, cases, or custom objects. RelatedToIds are polymorphic. Polymorphic means a RelatedToId is equivalent to the ID of a related object.
and if I try to use it , I get a
FIELD_INTEGRITY_EXCEPTION : Invalid id type
Is there any way we can associate EmailMessage to Lead?
The larger picture about what I have to do here is that:
We are sending an single email message from a lightning component button click through apex SingleMessage. When we do this, a record of activity history should be created for this lead and I have to add some custom fields on this activity history record to show some more information. I used
setSaveAsActivity(true) methods of
Messaging.SingleEmailMessage class but that gives a similar error as
SendEmail failed. First exception on row 0; first error: INVALID_ID_FIELD, SaveAsActivity is not allowed with whatId that is not supported as a task whatId.: [whatId, 00Q3a00000pHXf4]