Basic Delete Functionality

You can delete a task on the index page, with a basic confirm dialog box
to prevent accidental deletion.

app/controllers/tasks_controller.rb

@@ -23,6 +23,16 @@ def update
     end
   end
 
+  def destroy
+    @task = Task.find(params[:id])
+    if @task.delete
+      redirect_to tasks_path
+    else
+      flash[:error] = "Task deletion failed! #{print_errors(@task)}"
+      redirect_to tasks_path
+    end
+  end
+
   def task_create_params
     params.permit(:name)
   end

app/views/tasks/index.html.erb

@@ -15,17 +15,20 @@
             task_path(id: task.id, completed_flag: false),
             method: "patch",
             class: "btn btn-sm btn-danger" ) %>
-          <%= task.name %>
-        </li>
       <% else %>
         <li class='list-group-item task-item' id="task_<%= task.id %>">
           <%= link_to('Mark Complete',
             task_path(id: task.id, completed_flag: true),
             method: 'patch',
             :class => 'btn btn-sm btn-success')  %>
-          <%= task.name %>
-        </li>
       <% end %>
+        <%= link_to("Delete",
+            task_path(id: task.id),
+            method: "delete",
+            class: "btn btn-sm btn-warning",
+            data: { confirm: "Are you sure?" }) %>
+        <%= task.name %>
+      </li>
     <% end %>
     <li class='list-group-item' id="new-task-form">
       <%= form_tag("/tasks", method: "post") do %>

config/routes.rb

@@ -13,7 +13,7 @@
 
   # Example resource route (maps HTTP verbs to controller actions automatically):
   #   resources :products
-  resources :tasks, only: [:index, :create, :update]
+  resources :tasks, only: [:index, :create, :update, :destroy]
 
   # Example resource route with options:
   #   resources :products do