CRUD FLS issue to edit task access for site guest user

Question

I am applying CRUD FLS on task object fields and also I have provided read and edit access to task for site user profile. Even checked with sharing settings as 'Controlled by parent'.

But still when I debug that field is accessible but not having updateable access so it's not entering inside if loop. Below is the code for reference

for (Task objTask : taskList){
     if(Schema.SObjectType.Task.fields.Message_Status__c.isAccessible() && Schema.sObjectType.Task.fields.Message_Status__c.isUpdateable()){              
            objTask.Message_Status__c = taskStatus;
     }
}

Answer 1

How were you able to add CRUD for the task object in the site user? that object is not in the options (only the fields), but like @crmprogdev you are not going to be able to do this, even is you set everything to public.

I had this before, the only alternative sadly for sites, was having a custom object to replace this task.

perhaps a trigger will do the trick when a native task is edited, created, deleted, undeleted .... ammend the custom activity object

and i will add a trigger in the custom object to update the task that is link to make sure the class of this trigger is without sharing

public without sharing class

if this doesnt update the actual task, you might need to set a schedule job, this way the job is excecuted by a user with the full task permissions

Just an idea

Sharing settings of activity