added friends

app/controllers/friends_controller.rb

@@ -0,0 +1,56 @@
+class FriendsController < ApplicationController
+  before_action :set_friend, only: %i[ show edit update destroy ]
+
+  def index
+    @friends = Friend.all
+  end
+
+  def show
+  end
+
+  def new
+    @friend = Friend.new
+  end
+
+  def edit
+  end
+
+  def create
+    @friend = Friend.new(friend_params)
+
+    respond_to do |format|
+      if @friend.save
+        format.html { redirect_to friends_path, notice: "Der Freund wurde gespeichert." }
+      else
+        format.html { render :new, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  def update
+    respond_to do |format|
+      if @friend.update(friend_params)
+        format.html { redirect_to friends_path, notice: "Der Freund wurde angepasst.", status: :see_other }
+      else
+        format.html { render :edit, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  def destroy
+    @friend.destroy!
+
+    respond_to do |format|
+      format.html { redirect_to friends_path, notice: "Der Freund wurde gelöscht.", status: :see_other }
+    end
+  end
+
+  private
+    def set_friend
+      @friend = Friend.find(params.expect(:id))
+    end
+
+    def friend_params
+      params.expect(friend: [ :firstname, :lastname, :email, :telefon, :level ])
+    end
+end