Make a simple method work in view - ruby-on-rails

Question

REFORMULATED FOR MORE INFO
I'll be rather short. As a newbie, that's the error I am getting while developing my rails app:
param is missing or the value is empty: task
The error highlights:
def task_params
params.require(:task).permit(:name, :description, :deadline, :status, :pdf, :done)
end
It happens when I click the button 'Mark as done' I'm creating.
Here follows the code:
app/views/tasks/index.html.erb:
<p id="notice"><%= notice %></p>
<h1>Tasks</h1>
<table>
<thead>
<tr>
<th>Name</th>
<th>Description</th>
<th>Time</th>
<th>Ready?</th>
<th colspan="10"></th>
</tr>
</thead>
<tbody>
<% #tasks.each do |task| %>
<tr>
<td><%= task.name %></td>
<td><%= task.description %></td>
.
.
.
<td><%= (link_to 'Mark done', task_path(task, done: true), method: :PUT) %></td>
</tr>
<% end %>
</tbody>
</table>
<br>
app/controllers/tasks_controller.rb:
class TasksController < ApplicationController
before_action :set_task, only: [:show, :edit, :update, :destroy]
# GET /tasks
# GET /tasks.json
def index
#tasks = Task.all
end
# GET /tasks/1
# GET /tasks/1.json
def show
end
# GET /tasks/new
def new
#task = Task.new
end
# GET /tasks/1/edit
def edit
end
# POST /tasks
# POST /tasks.json
def create
#task = Task.new(task_params)
respond_to do |format|
if #task.save
format.html { redirect_to #task, notice: 'Task was successfully created.' }
format.json { render :show, status: :created, location: #task }
else
format.html { render :new }
format.json { render json: #task.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /tasks/1
# PATCH/PUT /tasks/1.json
def update
respond_to do |format|
if #task.update(task_params)
format.html { redirect_to #task, notice: 'Task was successfully updated.' }
format.json { render :show, status: :ok, location: #task }
else
format.html { render :edit }
format.json { render json: #task.errors, status: :unprocessable_entity }
end
end
end
# DELETE /tasks/1
# DELETE /tasks/1.json
def destroy
#task.destroy
respond_to do |format|
format.html { redirect_to tasks_url, notice: 'Task was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_task
#task = Task.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def task_params
params.require(:task).permit(:name, :description, :deadline, :status, :pdf, :done)
end
end
Thanks for the help!

Answer 1

since you've done this in controller as you said in command
before_action :set_task
def set_task
#task = Task.find(params[:id)
end
you should simply be able to do :
<td><%= 'Mark as done', tasks_setdone_path(task), method: :post %></td>
and not <td><%= 'Mark as done', tasks_setdone_path(task), method: :post %></td>
'#' represent instance variable accessible from controller AND template.
Another thing is that your action controller will require a respond (html or json).
Now that you answer is given, here is the proper way to do it.
task_path(#task, done: true), method: :PUT
POST is use for creation where PUT is use for updating an object.