Destroy action error: param not found: link

Question

I am building a mock up of reddit. When on my show view that displays the link & title I submit I have included an option(link) to destroy the submission.

When I click on the destroy I get:

ActionController::ParameterMissing in LinksController#destroy
param not found: link

on line:

params.require(:link).permit(:url, :title)

This is my full Links controller:

class LinksController < ApplicationController

    def index
      @link = Link.all
    end

    def show
      @link = Link.find(params[:id])
    end

    def new
      @link = Link.new
    end

    def create
      @link = Link.new(link_params)
        if @link.save
            redirect_to @link 
        else
            render action: 'new'
        end
    end

    def destroy
      @link = Link.find()
      if @link.destroy
        redirect_to index: 'action'
      else
        render show: 'action'
      end
    end


private
    def link_params
      params.require(:link).permit(:url, :title)
    end


end

This is my show view:

<h1> This is the show view </h1>


        <%= @link.title %>
        <%= @link.url %>
        <%= link_to 'Edit', edit_link_path(@link) %>\
        <%= link_to 'Destroy', (@link), method: :delete, data: { confirm: 'Are you sure?' } %>

I'm really confused, have tried multiple things but can't get it to work. How can i fix this?

Answer 1

Looks like you permit is missing :id and your destroy is missing params[:id] in the find clause.

Answer 2

Your problem is:

def destroy
  @link = Link.find()
  ...

You need something like:

def destroy
  @link = Link.find(params[:id])

What's happening is that your Destroy link is sending a DELETE request to some URL like /link/23 with 23 being params[:id]. You need to find the appropriate Link object by using Link.find(params[id]) before you destroy it (similar to how you would in show).