Drop useless indexes

app/services/karma_service.rb

@@ -31,7 +31,7 @@ def statistic_message
 
   def username(username)
     name = username || 'null'
-    until name.length == 20 do name += ' ' end
+    until name.length >= 20 do name += ' ' end
     name
   end
 

db/database.rb

@@ -13,7 +13,7 @@ def increase_karma(user_data, chat_id)
     if user.first
       update_user_karma_counter(user, user.first[:count] + 1)
     else
-      create_user(user_data, 1)
+      create_user(user_data, 1, chat_id)
     end
   end
 
@@ -23,7 +23,7 @@ def decrease_karma(user_data, chat_id)
     if user.first
       update_user_karma_counter(user, user.first[:count] - 1)
     else
-      create_user(user_data, chat_id)
+      create_user(user_data, 0, chat_id)
     end
   end
 
@@ -42,7 +42,7 @@ def count_grouped_users(chat_id)
   private
 
   def create_user(user_data, karma_count = 0, chat_id)
-    users.insert(UserBuilder.call(user_data, karma_count))
+    users.insert(UserBuilder.call(user_data, karma_count, chat_id))
   end
 
   def update_user_karma_counter(user, new_count)

db/migrations/7_drop_index_on_username.rb

@@ -0,0 +1,7 @@
+Sequel.migration do
+  change do
+    drop_index :users, :user_name
+    drop_index :users, :telegram_id
+    add_index :users, :telegram_id
+  end
+end