File upload for Guest Site user on Exp Cloud Lightning (Aura)

It looks like this is a problem for folks even in Flow. From what I can tell, if I can get the ContentVersion Id from the uploaded file, and then create another record that includes that ContentVersionId and the record Id of the custom object that’s created, we could then use Apex or Flow to associate them after the fact.

https://salesforce.stackexchange.com/questions/396284/guest-user-unable-to-upload-file-from-flow

Follow-up question: is there a way to get the record Id of the ContentDocument record that gets created as a result of the File Upload?

I’m sure there’s an API response from Salesforce somewhere that could be exposed; if I can store the returned ContactDocument Id on a field in the new custom object record, then Flow or Apex can take care of the rest, server-side.

Hey,

My dev has accomplished a similar request, by using a VF page and iframing it on site

VF Page: 
 

<apex:page showHeader="false" sidebar="false" standardController="your_object__c">    <apex:includeLightning />    <!--Lightning Container-->    <div style="width:100%;height:100px;" id="LightningContainer"/>    <script type="text/javascript">    //get account Id from URL    var recordId = "{!$CurrentPage.parameters.id}";         //Create Lightning Component UploadFileVfpage    $Lightning.use("c:sampleAuraFromVF", function() {        $Lightning.createComponent("c:uploadFileComponent",                                    { "parentID" : recordId }, //Pass Parameter                                   "LightningContainer", function(component) {                                       console.log('Component created');                                   });    });    </script></apex:page>

then on a template field:
<iframe src="/apex/c__UploadFileVfpage?Id={{{Id}}}&isdtp=vw" width="100%" height="140px" frameborder="0"/>

Dang. Ok. Welp, good to know. Thanks David!