#692: small refactoring according to Alexander's comments

app/controllers/api/v1/groups_controller.rb

@@ -28,8 +28,7 @@ class Api::V1::GroupsController < Api::V1::BaseController
   end
 
   def create
-    @group = Group.new params[:group]
-    @group.owner = current_user
+    @group = current_user.own_groups.new params[:group]
     create_subject @group
   end
 

app/models/relation.rb

@@ -33,11 +33,8 @@ class Relation < ActiveRecord::Base
   end
 
   def self.remove_member(member, target)
-    if target.try(:owner) == member
-      false
-    else
-      Relation.by_actor(member).by_target(target).each{|r| r.destroy}
-    end
+    return false if target.try(:owner) == member
+    Relation.by_actor(member).by_target(target).each{|r| r.destroy}
   end
 
   protected