Add contestants

app/controllers/contestants_controller.rb

@@ -0,0 +1,51 @@
+class ContestantsController < ApplicationController
+  before_action :set_contest
+  before_action :set_contestant, only: %i[ destroy edit update]
+
+  def edit
+    @title = "Edit contestant"
+  end
+
+  def new
+    @contestant = Contestant.new
+    @title = "New contestant"
+  end
+
+  def create
+    @contestant = Contestant.new(contestant_params)
+    @contestant.contest_id = @contest.id
+    if @contestant.save
+      redirect_to contest_path(@contest)
+    else
+      @title = "New contestant"
+      render :new, status: :unprocessable_entity
+    end
+  end
+
+  def update
+    if @contestant.update(contestant_params)
+      redirect_to @contest
+    else
+      render :edit, status: :unprocessable_entity
+    end
+  end
+
+  def destroy
+    @contestant.destroy
+    redirect_to contest_path(@contest)
+  end
+
+  private
+
+  def set_contest
+    @contest = Contest.find(params[:contest_id])
+  end
+
+  def set_contestant
+    @contestant = Contestant.find(params[:id])
+  end
+
+  def contestant_params
+    params.expect(contestant: [ :email, :name ])
+  end
+end