Render 'complete' button only if the task's status is not 'done'.

app/controllers/tasks_controller.rb

@@ -18,9 +18,18 @@ class TasksController < ApplicationController
   end
 
   def destroy
-    @task = @project.tasks.find(params[:id])
+    @task = @project.tasks.find_by(id: params[:id])
+    return unless @task
+
+    task_dom_id = "task_#{@task.id}"
     @task.destroy
+
+    respond_to do |format|
+      format.turbo_stream { render turbo_stream: turbo_stream.remove(task_dom_id) }
+      format.html { redirect_to @project }
     end
+  end
+
 
   def complete
     @task = @project.tasks.find(params[:id])
@@ -30,7 +39,7 @@ class TasksController < ApplicationController
       format.turbo_stream
       format.html { redirect_to @project }
     end
-end
+  end
 
   private
 

app/views/tasks/_task.html.erb

@@ -2,13 +2,12 @@
   <li>
     <%= task.title %> (<%= task.status %>)
 
-    <%= link_to "Destroy", project_task_path(task.project, task), data: {
-                    turbo_method: :delete,
-                    turbo_confirm: "Are you sure?"
-                } %>
+    <%= link_to "Destroy", project_task_path(task.project, task),
+          data: { turbo_method: :delete, turbo_confirm: "Are you sure?" } %>
 
-    <% unless task.status == "completed" %>
-      <%= button_to "Complete", complete_project_task_path(task.project, task),
+    <% unless task.status == "done" %>
+      <%= button_to "Complete",
+            complete_project_task_path(task.project, task),
             method: :patch,
             form: { data: { turbo_frame: dom_id(task) } } %>
     <% end %>