Modify model associations to map to new schema

app/models/group.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 class Group < ApplicationRecord
-  belongs_to :matches
-  belongs_to :teams
+  belongs_to :stage
+  has_many :matches, dependent: :destroy
+  has_many :group_scores, dependent: :destroy
 end

app/models/group_score.rb

@@ -2,4 +2,5 @@
 
 class GroupScore < ApplicationRecord
   belongs_to :team
+  belongs_to :group
 end

app/models/match.rb

@@ -1,4 +1,7 @@
 # frozen_string_literal: true
 
 class Match < ApplicationRecord
+  belongs_to :stage
+  belongs_to :group
+  has_many :scores, dependent: :destroy
 end

app/models/team.rb

@@ -2,6 +2,6 @@
 
 class Team < ApplicationRecord
   belongs_to :tournament
-
-  has_one :group_score, dependent: :destroy
+  has_many :group_scores, dependent: :destroy
+  has_many :scores, dependent: :destroy
 end

app/models/tournament.rb

@@ -3,12 +3,13 @@
 require 'securerandom'
 
 class Tournament < ApplicationRecord
+  belongs_to :user
+  has_many :teams, dependent: :destroy
+  has_many :stages, dependent: :destroy
+
   validates :name, presence: true
   validates :code, presence: true, uniqueness: true
 
-  has_many :teams, dependent: :destroy
-  belongs_to :user
-
   alias_attribute :owner, :user
 
   after_initialize do |tournament|