Controllers / CRUD: Deleting Products

Deleting Products

The last feature we need to implement is deleting products. We will add a destroy action to our ProductsController to handle DELETE /products/:id requests.

Adding destroy to before_action :set_product lets us set the @product instance variable in the same way we do for the other actions.

class ProductsController < ApplicationController
  before_action :set_product, only: %i[ show edit update destroy ]

  def index
    @products = Product.all
  end

  def show
  end

  def new
    @product = Product.new
  end

  def create
    @product = Product.new(product_params)
    if @product.save
      redirect_to @product
    else
      render :new, status: :unprocessable_entity
    end
  end

  def edit
  end

  def update
    if @product.update(product_params)
      redirect_to @product
    else
      render :edit, status: :unprocessable_entity
    end
  end

  def destroy
    @product.destroy
    redirect_to products_path
  end

  private
    def set_product
      @product = Product.find(params[:id])
    end

    def product_params
      params.expect(product: [ :name ])
    end
end

To make this work, we need to add a Delete button to :

<h1><%= @product.name %></h1>

<%= link_to "Back", products_path %>
<%= link_to "Edit", edit_product_path(@product) %>
<%= button_to "Delete", @product, method: :delete, data: { turbo_confirm: "Are you sure?" } %>

button_to generates a form with a single button in it with the “Delete” text. When this button is clicked, it submits the form which makes a DELETE request to /products/:id which triggers the destroy action in our controller.

The turbo_confirm data attribute tells the Turbo JavaScript library to ask the user to confirm before submitting the form. We’ll dig more into that shortly.

Extracting Partials

Adding Authentication

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