add player rating to the db

main-server/app/channels/matchmaking_channel.rb

@@ -3,7 +3,7 @@
 # Client flow:
 #   1. Connect: ws(s)://host/cable?token=<JWT>
 #   2. Subscribe to "MatchmakingChannel"
-#   3. Send { action: "start", rating: <optional int> } to enter the queue
+#   3. Send { action: "start" } to enter the queue
 #   4. Receive { type: "matched", ... } or { type: "timeout" }
 #   5. Disconnecting (or sending { action: "stop" }) cancels the search.
 class MatchmakingChannel < ApplicationCable::Channel
@@ -17,8 +17,8 @@ class MatchmakingChannel < ApplicationCable::Channel
     end
   end
 
-  def start(data)
-    MatchmakingService.enqueue(current_user.id, rating: data["rating"])
+  def start(_data)
+    MatchmakingService.enqueue(current_user.id, rating: current_user.rating)
   end
 
   def stop

main-server/app/models/user.rb

@@ -7,6 +7,7 @@ class User < ApplicationRecord
   normalizes :nickname, with: ->(n) { n.strip }
 
   validates :nickname, presence: true, uniqueness: { case_sensitive: false }, length: { minimum: 3, maximum: 24 }
+  validates :rating, presence: true
   validates :password, presence: true, length: { minimum: 6 }, if: -> { new_record? || password_digest_changed? }
   validate :avatar_content_type, if: -> { avatar.attached? }
 

main-server/app/services/matchmaking_service.rb

@@ -186,8 +186,7 @@ class MatchmakingService
     # Adds the user to the queue and immediately tries to pair them.
     # The result (match or timeout) is delivered asynchronously via
     # MatchmakingChannel broadcasts.
-    def enqueue(user_id, rating: nil)
-      rating ||= config.default_rating
+    def enqueue(user_id, rating:)
       results = call_pair_script("enqueue", extra: [ user_id, rating ])
       process_results(results)
     end