boolean field not updating in Rails

Question

I am building a basic crud app; with my controller method for updating a task as follows :-

  def update
    @task = Task.find(params[:id])
    respond_to do |format|
      if @task.update(task_params)
        format.html { redirect_to task_url(@task), notice: "Task was successfully updated." }
        format.json { render :show, status: :ok, location: @task }
      else
        format.html { render :edit, status: :unprocessable_entity }
        format.json { render json: @task.errors, status: :unprocessable_entity }
      end
    end
  end

Tasks have a boolean field completed.

create_table "tasks", force: :cascade do |t|
  t.string "title"
  t.text "content"
  t.string "createdby"
  t.datetime "createdat", precision: 6
  t.boolean "completed"
  t.datetime "created_at", precision: 6, null: false
  t.datetime "updated_at", precision: 6, null: false
end

Issue is when I am trying to update tasks, all fields apart from completed gets updated. Updating completed to false gives me Task updated message successfully, but value of the boolean field reverts back to true no matter how many times I change it.

P.S. I am passing in field completed as params.

Below is the view for rendering the checkbox for boolean field completed :-

<div class="form field-group">
    <%= form.check_box :completed, { class: "class-name", style: "style"}, "checked-value", "unchecked-value" %> Completed
</div>

I am totally new to ROR & any help would be appreciated.

Tried updating task from console as follows :-

=> Task.last.update(:completed => false).save

Does update, but reverts back to true everytime update is done from browser ui

Answer 1

Your values for the checkbox appear to be "checked-value", "unchecked-value" so when it is checked it returns a string of either "checked-value" or "unchecked-value" Since they are both strings they evaluate to true. Change them to true and false.

    <%= form.check_box :completed, { class: "class-name", style: "style"}, "true", "false" %> Completed

Answer 2

<%= form.check_box :completed, { class: "class-name", style: "style"}, "checked-value", "unchecked-value" %>

When the check box is not ticked your server will receive "unchecked-value" as the value for completed. This will still evaluate to true. You can try this by doing the following in the console:

> task = Task.new
> task.completed = "unchecked-value"
> puts task.completed
true

The default unchecked value is "0" which will give the expected behaviour.

> task.completed = "0"
> puts task.completed
false

Unless you have a reason for having "unchecked-value" a fix would be just to use the defaults:

<%= form.check_box :completed, { class: "class-name", style: "style"} %>