IIIRR-29 Update for issue in tables and prevent answer duplication

app/lib/discord/events/puzzle_answer.rb

@@ -40,23 +40,29 @@ def handle(event)
           return
         end
 
-        server = Server.find_or_initialize_by(server_id: event.server.id)
-
         # Create the answer record
-        answer = Answer.create!(
+        answer = Answer.create(
           puzzle_id: puzzle.id,
           user_id: user.id,
           server_id: server.id,
           choice: answer, # 'ruby' or 'rails'
           is_correct: puzzle.answer.to_s == answer # Correct answer check
         )
-
-        # Respond to the user with the result
-        event.respond(
-          content: nil,
-          embeds: [ answer_embed(answer, puzzle) ],
-          ephemeral: true # Only the user sees this message
-        )
+        if answer
+          # Respond to the user with the result
+          event.respond(
+            content: nil,
+            embeds: [ answer_embed(answer, puzzle) ],
+            ephemeral: true # Only the user sees this message
+          )
+        else
+          # If the user has already answered, prevent them from changing their answer
+          event.respond(
+            content: "You have already answered this puzzle. You cannot change your answer.",
+            ephemeral: true # Only the user sees this message
+          )
+          nil
+        end
       end
 
       private

app/models/answer.rb

@@ -1,4 +1,6 @@
 class Answer < ApplicationRecord
   belongs_to :puzzle
   belongs_to :user
+
+  validates :puzzle_id, uniqueness: { scope: [ :user_id, :server_id ] }
 end

app/models/server.rb

@@ -1,3 +1,4 @@
 class Server < ApplicationRecord
+  has_and_belongs_to_many :users, join_table: "users_servers"
   has_one :channel
 end

app/models/user.rb

@@ -1,6 +1,6 @@
 class User < ApplicationRecord
-  has_and_belongs_to_many :servers
-  has_many :servers
+  has_and_belongs_to_many :servers, join_table: "users_servers"
+  has_many :answers
 
   enum :role, admin: 0, member: 1
 end

db/migrate/20250917170711_add_unique_index_to_answers.rb

@@ -0,0 +1,5 @@
+class AddUniqueIndexToAnswers < ActiveRecord::Migration[8.0]
+  def change
+    add_index :answers, [ :puzzle_id, :user_id, :server_id ], unique: true, name: 'index_answers_on_puzzle_user_server'
+  end
+end

db/seeds.rb

@@ -1,19 +1,47 @@
-
 # db/seeds.rb
 
-# Create Puzzle records
-Puzzle.create!([
-  { question: "Ruby or Rails provided this method? Array.new(5) { |i| i * 2 }", answer: :ruby, explanation: "`Array.new` is a core Ruby method that creates a new array with a specified size and optional block for initialization. This is part of Ruby’s core library." },
-  { question: "Ruby or Rails provided this method? File.open('log.txt', 'w') { |file| file.write('Hello, World!') }", answer: :ruby, explanation: "`File.open` is a core Ruby method for opening files. It’s part of Ruby's standard library for file handling, not part of Rails." },
-  { question: "Ruby or Rails provided this method? render json: @user", answer: :rails, explanation: "`render json:` is a Rails method used to render a JSON response from a controller action." },
-  { question: "Ruby or Rails provided this method? link_to 'Home', root_path", answer: :rails, explanation: "`link_to` is a Rails helper method that generates HTML links. `root_path` is a Rails path helper." },
-  { question: "Ruby or Rails provided this method? params[:id]", answer: :rails, explanation: "`params[:id]` is used in Rails to fetch query parameters or URL parameters in controller actions." }
-])
+# ====== Create Puzzle records ======
+puzzles = [
+  {
+    question: "Ruby or Rails provided this method? Array.new(5) { |i| i * 2 }",
+    answer: :ruby,
+    explanation: "`Array.new` is a core Ruby method that creates a new array with a specified size and optional block for initialization. This is part of Ruby’s core library."
+  },
+  {
+    question: "Ruby or Rails provided this method? File.open('log.txt', 'w') { |file| file.write('Hello, World!') }",
+    answer: :ruby,
+    explanation: "`File.open` is a core Ruby method for opening files. It’s part of Ruby's standard library for file handling, not part of Rails."
+  },
+  {
+    question: "Ruby or Rails provided this method? render json: @user",
+    answer: :rails,
+    explanation: "`render json:` is a Rails method used to render a JSON response from a controller action."
+  },
+  {
+    question: "Ruby or Rails provided this method? link_to 'Home', root_path",
+    answer: :rails,
+    explanation: "`link_to` is a Rails helper method that generates HTML links. `root_path` is a Rails path helper."
+  },
+  {
+    question: "Ruby or Rails provided this method? params[:id]",
+    answer: :rails,
+    explanation: "`params[:id]` is used in Rails to fetch query parameters or URL parameters in controller actions."
+  }
+]
+
+puzzles.each do |p|
+  Puzzle.find_or_create_by!(question: p[:question]) do |puzzle|
+    puzzle.answer = p[:answer]
+    puzzle.explanation = p[:explanation]
+  end
+end
 
-# Create a server
-Server.create!(server_id: 1179555097060061245, name: "OmbuTest")
+# ====== Create the Server ======
+server = Server.find_or_create_by!(server_id: 1179555097060061245) do |s|
+  s.name = "OmbuTest"
+end
 
-# Seed data for 10 users with answers
+# ====== Create Users and associate with Server ======
 users = [
   { user_id: 101, username: "user1", role: "member" },
   { user_id: 102, username: "user2", role: "member" },
@@ -28,16 +56,24 @@
 ]
 
 users.each do |user_data|
-  user = User.create(user_id: user_data[:user_id], username: user_data[:username], role: user_data[:role])
+  user = User.find_or_create_by!(user_id: user_data[:user_id]) do |u|
+    u.username = user_data[:username]
+    u.role = user_data[:role]
+  end
+
+  # Associate user with the server if not already linked
+  user.servers << server unless user.servers.include?(server)
 
-  # Randomly assign scores to answers (you can adjust as needed)
-  3.times do
-    Answer.create!(
-      user_id: user.id,
-      puzzle_id: Puzzle.all.sample.id,
-      server_id: Server.first.id,
-      choice: [ "ruby", "rails" ].sample,
-      is_correct: [ true, false ].sample
-    )
+  # Seed random answers for this user if they have none
+  if user.answers.where(server_id: server.id).empty?
+    3.times do
+      Answer.create!(
+        user_id: user.id,
+        puzzle_id: Puzzle.all.sample.id,
+        server_id: server.id,
+        choice: [ "ruby", "rails" ].sample,
+        is_correct: [ true, false ].sample
+      )
+    end
   end
 end