Trim WebHookUserSerializer.

app/serializers/user_serializer.rb

@@ -339,22 +339,36 @@ class UserSerializer < BasicUserSerializer
     User.system_avatar_template(object.username)
   end
 
+  def include_gravatar_avatar_upload_id?
+    object.user_avatar&.gravatar_upload_id
+  end
+
   def gravatar_avatar_upload_id
-    object.user_avatar.try(:gravatar_upload_id)
+    object.user_avatar.gravatar_upload_id
+  end
+
+  def include_gravatar_avatar_template?
+    include_gravatar_avatar_upload_id?
   end
 
   def gravatar_avatar_template
-    return unless gravatar_upload_id = object.user_avatar.try(:gravatar_upload_id)
-    User.avatar_template(object.username, gravatar_upload_id)
+    User.avatar_template(object.username, object.user_avatar.gravatar_upload_id)
+  end
+
+  def include_custom_avatar_upload_id?
+    object.user_avatar&.custom_upload_id
   end
 
   def custom_avatar_upload_id
-    object.user_avatar.try(:custom_upload_id)
+    object.user_avatar.custom_upload_id
+  end
+
+  def include_custom_avatar_template?
+    include_custom_avatar_upload_id?
   end
 
   def custom_avatar_template
-    return unless custom_upload_id = object.user_avatar.try(:custom_upload_id)
-    User.avatar_template(object.username, custom_upload_id)
+    User.avatar_template(object.username, object.user_avatar.custom_upload_id)
   end
 
   def has_title_badges

app/serializers/web_hook_user_serializer.rb

@@ -5,6 +5,31 @@ class WebHookUserSerializer < UserSerializer
   def staff_attributes(*attrs)
   end
 
+  %i{
+    can_edit
+    can_edit_username
+    can_edit_email
+    can_edit_name
+    can_send_private_messages
+    can_send_private_message_to_user
+    uploaded_avatar_id
+    has_title_badges
+    bio_cooked
+    custom_fields
+    can_be_deleted
+    can_delete_all_posts
+    system_avatar_upload_id
+    gravatar_avatar_upload_id
+    custom_avatar_upload_id
+    can_change_bio
+    user_api_keys
+    group_users
+  }.each do |attr|
+    define_method("include_#{attr}?") do
+      false
+    end
+  end
+
   def include_email?
     scope.is_admin?
   end

spec/serializers/web_hook_user_serializer_spec.rb

@@ -18,4 +18,21 @@ RSpec.describe WebHookUserSerializer do
     expect(payload[:email]).to eq(user.email)
     expect(payload[:external_id]).to eq('12345')
   end
+
+  it 'should only include the required keys' do
+    count = serializer.as_json.keys.count
+    difference = count - 42
+
+    expect(difference).to eq(0), lambda {
+      message = ""
+
+      if difference < 0
+        message << "#{difference * -1} key(s) have been removed from this serializer."
+      else
+        message << "#{difference} key(s) have been added to this serializer."
+      end
+
+      message << "\nPlease verify if those key(s) are required as part of the web hook's payload."
+    }
+  end
 end