How to stop the default email notifications for a particular User in salesforce through apex code

Question

I am trying to stop the default email notifications for a particular User in salesforce through apex code. Stopping default email notifications can be done manually by going to My Settings -> Email Settings and unchecking 'Receive emails' checkbox. I need to achieve the same thing through Apex code. Please suggest how can this be done?

Answer 1

Have you tried the settings on the NetworkMember object? For Communities, this seems to take precedence. For a similar issue, I poked it via the developer console with this query:

SELECT Id, PreferencesDisableAllFeedsEmail FROM NetworkMember WHERE MemberId = ''

Answer 2

Assuming you are referring to the chatter email settings feature:

You can clear this checkbox by setting the UserPreferencesDisableAllFeedsEmail field to true for the user. In the screenshot above my Receive emails checkbox is set, but if I execute the following Apex code:

User u=[select id, UserPreferencesDisableAllFeedsEmail from User 
      where id=:UserInfo.getUserId()];
u.UserPreferencesDisableAllFeedsEmail=true;
update u;

the checkbox is cleared:

Answer 3

Run below code in developer console to disable chatter only for community users.

Profile p = [Select Id,name from Profile where name = 'System Administrator']; 
List<NetworkMember> nmList = [Select Id,MemberId,NetworkId,PreferencesDisableAllFeedsEmail FROM NetworkMember WHERE Member.ProfileId != p.Id];
    for(NetworkMember nm: netMemList){
     nm.PreferencesDisableAllFeedsEmail = true;   
    }
    update nmList;