Allow to delete puzzles

app/controllers/puzzles_controller.rb

@@ -39,7 +39,7 @@ class PuzzlesController < ApplicationController
 
   def destroy
     @puzzle.destroy
-    redirect_to puzzles_path
+    redirect_to contest_path(@contest)
   end
 
   private

app/models/contest.rb

@@ -1,4 +1,4 @@
 class Contest < ApplicationRecord
-  belongs_to :user, dependent: :destroy
-  has_many :puzzles
+  belongs_to :user
+  has_many :puzzles, dependent: :destroy
 end

app/models/puzzle.rb

@@ -1,5 +1,5 @@
 class Puzzle < ApplicationRecord
-  belongs_to :contest, dependent: :destroy
+  belongs_to :contest
   has_one_attached :image
   validates :name, presence: true
 end

app/views/puzzles/_form.html.slim

@@ -8,6 +8,8 @@
     .col
       .form-text Select an image
       = form.file_field :image, accept: "image/*", class: "form-control"
-  .row
+  .row.mt-4
     .col
+      - if method == :patch
+        = link_to "Delete", contest_puzzle_path(contest, puzzle), data: { turbo_method: :delete }, class: "btn btn-danger me-2"
       = form.submit submit_text, class: "btn btn-primary"